[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Russell King]

Parsing the EDID for HDMI and audio information in the get_modes()
callback is incorrect - this only parses the EDID read from the
connector, not any override or firmware provided EDID.

The correct place to parse the EDID for these parameters is the
fill_modes() callback, after we've called the helper.  Move the parsing
there.  This caused problems for Lu?s Mendes.

Cc: <stable@vger.kernel.org>
Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 9fe407f49986..2516a1c18a10 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
 			edid->width_cm, edid->height_cm);
 
-		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
-		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
 		drm_mode_connector_update_edid_property(connector, edid);
-		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
 		ret = drm_add_edid_modes(connector, edid);
 		/* Store the ELD */
 		drm_edid_to_eld(connector, edid);
@@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 	return ret;
 }
 
+static int dw_hdmi_connector_fill_modes(struct drm_connector *connector,
+					uint32_t maxX, uint32_t maxY)
+{
+	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
+					    connector);
+	int ret;
+
+	ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
+
+	if (connector->edid_blob_ptr) {
+		struct edid *edid = (void *)connector->edid_blob_ptr->data;
+
+		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
+		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
+		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
+	} else {
+		hdmi->sink_is_hdmi = false;
+		hdmi->sink_has_audio = false;
+	}
+
+	return ret;
+}
+
 static void dw_hdmi_connector_force(struct drm_connector *connector)
 {
 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
@@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct drm_connector *connector)
 }
 
 static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
-	.fill_modes = drm_helper_probe_single_connector_modes,
+	.fill_modes = dw_hdmi_connector_fill_modes,
 	.detect = dw_hdmi_connector_detect,
 	.destroy = drm_connector_cleanup,
 	.force = dw_hdmi_connector_force,
-- 
2.7.4

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Archit Taneja]

On 11/07/2017 04:57 PM, Russell King wrote:
> Parsing the EDID for HDMI and audio information in the get_modes()
> callback is incorrect - this only parses the EDID read from the
> connector, not any override or firmware provided EDID.
> 
> The correct place to parse the EDID for these parameters is the
> fill_modes() callback, after we've called the helper.  Move the parsing
> there.  This caused problems for Lu?s Mendes.

Looks good to me. I'll queue it to drm-misc-next-fixes in a few days if no one
else has objections.

Archit

> 
> Cc: <stable@vger.kernel.org>
> Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> ---
>   drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28 ++++++++++++++++++++++++----
>   1 file changed, 24 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 9fe407f49986..2516a1c18a10 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>   		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
>   			edid->width_cm, edid->height_cm);
>   
> -		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> -		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>   		drm_mode_connector_update_edid_property(connector, edid);
> -		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
>   		ret = drm_add_edid_modes(connector, edid);
>   		/* Store the ELD */
>   		drm_edid_to_eld(connector, edid);
> @@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>   	return ret;
>   }
>   
> +static int dw_hdmi_connector_fill_modes(struct drm_connector *connector,
> +					uint32_t maxX, uint32_t maxY)
> +{
> +	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> +					    connector);
> +	int ret;
> +
> +	ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
> +
> +	if (connector->edid_blob_ptr) {
> +		struct edid *edid = (void *)connector->edid_blob_ptr->data;
> +
> +		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> +		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
> +		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
> +	} else {
> +		hdmi->sink_is_hdmi = false;
> +		hdmi->sink_has_audio = false;
> +	}
> +
> +	return ret;
> +}
> +
>   static void dw_hdmi_connector_force(struct drm_connector *connector)
>   {
>   	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> @@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct drm_connector *connector)
>   }
>   
>   static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
> -	.fill_modes = drm_helper_probe_single_connector_modes,
> +	.fill_modes = dw_hdmi_connector_fill_modes,
>   	.detect = dw_hdmi_connector_detect,
>   	.destroy = drm_connector_cleanup,
>   	.force = dw_hdmi_connector_force,
> 

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Daniel Vetter]

On Tue, Nov 07, 2017 at 11:27:21AM +0000, Russell King wrote:
> Parsing the EDID for HDMI and audio information in the get_modes()
> callback is incorrect - this only parses the EDID read from the
> connector, not any override or firmware provided EDID.
> 
> The correct place to parse the EDID for these parameters is the
> fill_modes() callback, after we've called the helper.  Move the parsing
> there.  This caused problems for Lu?s Mendes.
> 
> Cc: <stable@vger.kernel.org>
> Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28 ++++++++++++++++++++++++----
>  1 file changed, 24 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 9fe407f49986..2516a1c18a10 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
>  			edid->width_cm, edid->height_cm);
>  
> -		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> -		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>  		drm_mode_connector_update_edid_property(connector, edid);
> -		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
>  		ret = drm_add_edid_modes(connector, edid);
>  		/* Store the ELD */
>  		drm_edid_to_eld(connector, edid);
> @@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  	return ret;
>  }
>  
> +static int dw_hdmi_connector_fill_modes(struct drm_connector *connector,
> +					uint32_t maxX, uint32_t maxY)
> +{
> +	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> +					    connector);
> +	int ret;
> +
> +	ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
> +
> +	if (connector->edid_blob_ptr) {
> +		struct edid *edid = (void *)connector->edid_blob_ptr->data;
> +
> +		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> +		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
> +		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
> +	} else {
> +		hdmi->sink_is_hdmi = false;
> +		hdmi->sink_has_audio = false;
> +	}
> +
> +	return ret;
> +}
> +
>  static void dw_hdmi_connector_force(struct drm_connector *connector)
>  {
>  	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> @@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct drm_connector *connector)
>  }
>  
>  static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
> -	.fill_modes = drm_helper_probe_single_connector_modes,
> +	.fill_modes = dw_hdmi_connector_fill_modes,

Papering over helper functions shouldn't be necessary, except the helper
functions not handling the override edid is a known issue. Jani Nikula is
working on a proper fix, please coordinate with him.
-Daniel

>  	.detect = dw_hdmi_connector_detect,
>  	.destroy = drm_connector_cleanup,
>  	.force = dw_hdmi_connector_force,
> -- 
> 2.7.4
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Russell King - ARM Linux]

On Thu, Nov 09, 2017 at 09:23:18AM +0100, Daniel Vetter wrote:
> On Tue, Nov 07, 2017 at 11:27:21AM +0000, Russell King wrote:
> > Parsing the EDID for HDMI and audio information in the get_modes()
> > callback is incorrect - this only parses the EDID read from the
> > connector, not any override or firmware provided EDID.
> > 
> > The correct place to parse the EDID for these parameters is the
> > fill_modes() callback, after we've called the helper.  Move the parsing
> > there.  This caused problems for Lu?s Mendes.
> > 
> > Cc: <stable@vger.kernel.org>
> > Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> > Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> > Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> > ---
> >  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28 ++++++++++++++++++++++++----
> >  1 file changed, 24 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > index 9fe407f49986..2516a1c18a10 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > @@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
> >  		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
> >  			edid->width_cm, edid->height_cm);
> >  
> > -		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> > -		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
> >  		drm_mode_connector_update_edid_property(connector, edid);
> > -		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
> >  		ret = drm_add_edid_modes(connector, edid);
> >  		/* Store the ELD */
> >  		drm_edid_to_eld(connector, edid);
> > @@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
> >  	return ret;
> >  }
> >  
> > +static int dw_hdmi_connector_fill_modes(struct drm_connector *connector,
> > +					uint32_t maxX, uint32_t maxY)
> > +{
> > +	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> > +					    connector);
> > +	int ret;
> > +
> > +	ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
> > +
> > +	if (connector->edid_blob_ptr) {
> > +		struct edid *edid = (void *)connector->edid_blob_ptr->data;
> > +
> > +		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> > +		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
> > +		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
> > +	} else {
> > +		hdmi->sink_is_hdmi = false;
> > +		hdmi->sink_has_audio = false;
> > +	}
> > +
> > +	return ret;
> > +}
> > +
> >  static void dw_hdmi_connector_force(struct drm_connector *connector)
> >  {
> >  	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> > @@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct drm_connector *connector)
> >  }
> >  
> >  static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
> > -	.fill_modes = drm_helper_probe_single_connector_modes,
> > +	.fill_modes = dw_hdmi_connector_fill_modes,
> 
> Papering over helper functions shouldn't be necessary, except the helper
> functions not handling the override edid is a known issue. Jani Nikula is
> working on a proper fix, please coordinate with him.

So, what you're basically saying is that fixing real bugs that affect
users is not something that DRM people want.  That's fine, I'll ignore
people who come to me for help with DRM bugs in future then because
it's obviously a dead loss.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
According to speedtest.net: 8.21Mbps down 510kbps up

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Jani Nikula]

On Thu, 09 Nov 2017, Russell King - ARM Linux <linux@armlinux.org.uk> wrote:
> On Thu, Nov 09, 2017 at 09:23:18AM +0100, Daniel Vetter wrote:
>> On Tue, Nov 07, 2017 at 11:27:21AM +0000, Russell King wrote:
>> > Parsing the EDID for HDMI and audio information in the get_modes()
>> > callback is incorrect - this only parses the EDID read from the
>> > connector, not any override or firmware provided EDID.
>> > 
>> > The correct place to parse the EDID for these parameters is the
>> > fill_modes() callback, after we've called the helper.  Move the parsing
>> > there.  This caused problems for Lu?s Mendes.
>> > 
>> > Cc: <stable@vger.kernel.org>
>> > Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
>> > Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
>> > Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
>> > ---
>> >  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28 ++++++++++++++++++++++++----
>> >  1 file changed, 24 insertions(+), 4 deletions(-)
>> > 
>> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> > index 9fe407f49986..2516a1c18a10 100644
>> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> > @@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>> >  		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
>> >  			edid->width_cm, edid->height_cm);
>> >  
>> > -		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
>> > -		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>> >  		drm_mode_connector_update_edid_property(connector, edid);
>> > -		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
>> >  		ret = drm_add_edid_modes(connector, edid);
>> >  		/* Store the ELD */
>> >  		drm_edid_to_eld(connector, edid);
>> > @@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>> >  	return ret;
>> >  }
>> >  
>> > +static int dw_hdmi_connector_fill_modes(struct drm_connector *connector,
>> > +					uint32_t maxX, uint32_t maxY)
>> > +{
>> > +	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
>> > +					    connector);
>> > +	int ret;
>> > +
>> > +	ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
>> > +
>> > +	if (connector->edid_blob_ptr) {
>> > +		struct edid *edid = (void *)connector->edid_blob_ptr->data;
>> > +
>> > +		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
>> > +		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>> > +		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
>> > +	} else {
>> > +		hdmi->sink_is_hdmi = false;
>> > +		hdmi->sink_has_audio = false;
>> > +	}
>> > +
>> > +	return ret;
>> > +}
>> > +
>> >  static void dw_hdmi_connector_force(struct drm_connector *connector)
>> >  {
>> >  	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
>> > @@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct drm_connector *connector)
>> >  }
>> >  
>> >  static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
>> > -	.fill_modes = drm_helper_probe_single_connector_modes,
>> > +	.fill_modes = dw_hdmi_connector_fill_modes,
>> 
>> Papering over helper functions shouldn't be necessary, except the helper
>> functions not handling the override edid is a known issue. Jani Nikula is
>> working on a proper fix, please coordinate with him.
>
> So, what you're basically saying is that fixing real bugs that affect
> users is not something that DRM people want.  That's fine, I'll ignore
> people who come to me for help with DRM bugs in future then because
> it's obviously a dead loss.

We may already have fixed the bug in drm-next at the proper
layer. Please see my other mail.

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Technology Center

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Luís Mendes]

Hi,

I've just applied the referred individual patch to kernel-4.14-rc5 and
the EDID isn't loaded. dw-hdmi gets no firmware at all.

#cat /proc/cmdline
console=ttymxc0,115200 root=/dev/sda2 rw video=HDMI-A-1:1920x1080M at 60
drm.edid_firmware=edid/ktc_edid.bin dw_hdmi.dyndbg=+pfl cma=128M

#zcat /proc/config.gz  | grep EDID
CONFIG_DRM_LOAD_EDID_FIRMWARE=y
# CONFIG_FIRMWARE_EDID is not set

#cat /sys/class/drm/card1-HDMI-A-1/edid
<empty>

#dmesg
...
[    8.815238] imx-drm display-subsystem: bound imx-ipuv3-crtc.2 (ops
ipu_crtc_ops [imxdrm])
[    8.815555] imx-drm display-subsystem: bound imx-ipuv3-crtc.3 (ops
ipu_crtc_ops [imxdrm])
[    8.815832] imx-drm display-subsystem: bound imx-ipuv3-crtc.6 (ops
ipu_crtc_ops [imxdrm])
[    8.816073] imx-drm display-subsystem: bound imx-ipuv3-crtc.7 (ops
ipu_crtc_ops [imxdrm])
[    8.818243] dwhdmi-imx 120000.hdmi: Detected HDMI TX controller
v1.30a with HDCP (DWC HDMI 3D TX PHY)
[    8.821780] hdmi_set_clk_regenerator:521: dwhdmi-imx 120000.hdmi:
hdmi_set_clk_regenerator: fs=48000Hz ftdms=74.250MHz N=6144 cts=74250
[    8.831034] imx-drm display-subsystem: bound 120000.hdmi (ops
dw_hdmi_imx_ops [dw_hdmi_imx])
[    8.832218] [drm] Cannot find any crtc or sizes
[    8.839807] [drm] Initialized imx-drm 1.0.0 20120507 for
display-subsystem on minor 1

Regards,
Lu?s Mendes

On Thu, Nov 9, 2017 at 9:51 AM, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
> Hi everyone,
>
> I can try that patch and see if it fixes the problem.
> Give me a moment so that I can check how it goes.
>
> Lu?s
>
>
>
> On Thu, Nov 9, 2017 at 9:49 AM, Jani Nikula <jani.nikula@linux.intel.com>
> wrote:
>>
>> On Thu, 09 Nov 2017, Russell King - ARM Linux <linux@armlinux.org.uk>
>> wrote:
>> > On Thu, Nov 09, 2017 at 09:23:18AM +0100, Daniel Vetter wrote:
>> >> On Tue, Nov 07, 2017 at 11:27:21AM +0000, Russell King wrote:
>> >> > Parsing the EDID for HDMI and audio information in the get_modes()
>> >> > callback is incorrect - this only parses the EDID read from the
>> >> > connector, not any override or firmware provided EDID.
>> >> >
>> >> > The correct place to parse the EDID for these parameters is the
>> >> > fill_modes() callback, after we've called the helper.  Move the
>> >> > parsing
>> >> > there.  This caused problems for Lu?s Mendes.
>> >> >
>> >> > Cc: <stable@vger.kernel.org>
>> >> > Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
>> >> > Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
>> >> > Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
>> >> > ---
>> >> >  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28
>> >> > ++++++++++++++++++++++++----
>> >> >  1 file changed, 24 insertions(+), 4 deletions(-)
>> >> >
>> >> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> >> > b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> >> > index 9fe407f49986..2516a1c18a10 100644
>> >> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> >> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>> >> > @@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct
>> >> > drm_connector *connector)
>> >> >            dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
>> >> >                    edid->width_cm, edid->height_cm);
>> >> >
>> >> > -          hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
>> >> > -          hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>> >> >            drm_mode_connector_update_edid_property(connector, edid);
>> >> > -          cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier,
>> >> > edid);
>> >> >            ret = drm_add_edid_modes(connector, edid);
>> >> >            /* Store the ELD */
>> >> >            drm_edid_to_eld(connector, edid);
>> >> > @@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct
>> >> > drm_connector *connector)
>> >> >    return ret;
>> >> >  }
>> >> >
>> >> > +static int dw_hdmi_connector_fill_modes(struct drm_connector
>> >> > *connector,
>> >> > +                                  uint32_t maxX, uint32_t maxY)
>> >> > +{
>> >> > +  struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
>> >> > +                                      connector);
>> >> > +  int ret;
>> >> > +
>> >> > +  ret = drm_helper_probe_single_connector_modes(connector, maxX,
>> >> > maxY);
>> >> > +
>> >> > +  if (connector->edid_blob_ptr) {
>> >> > +          struct edid *edid = (void
>> >> > *)connector->edid_blob_ptr->data;
>> >> > +
>> >> > +          hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
>> >> > +          hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>> >> > +          cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier,
>> >> > edid);
>> >> > +  } else {
>> >> > +          hdmi->sink_is_hdmi = false;
>> >> > +          hdmi->sink_has_audio = false;
>> >> > +  }
>> >> > +
>> >> > +  return ret;
>> >> > +}
>> >> > +
>> >> >  static void dw_hdmi_connector_force(struct drm_connector *connector)
>> >> >  {
>> >> >    struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
>> >> > @@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct
>> >> > drm_connector *connector)
>> >> >  }
>> >> >
>> >> >  static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
>> >> > -  .fill_modes = drm_helper_probe_single_connector_modes,
>> >> > +  .fill_modes = dw_hdmi_connector_fill_modes,
>> >>
>> >> Papering over helper functions shouldn't be necessary, except the
>> >> helper
>> >> functions not handling the override edid is a known issue. Jani Nikula
>> >> is
>> >> working on a proper fix, please coordinate with him.
>> >
>> > So, what you're basically saying is that fixing real bugs that affect
>> > users is not something that DRM people want.  That's fine, I'll ignore
>> > people who come to me for help with DRM bugs in future then because
>> > it's obviously a dead loss.
>>
>> We may already have fixed the bug in drm-next at the proper
>> layer. Please see my other mail.
>>
>> BR,
>> Jani.
>>
>> --
>> Jani Nikula, Intel Open Source Technology Center
>
>

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Luís Mendes]

Complementing my previous email information with better dmesg output
(I had booted with my TV monitor off in my previous email):
[    8.687907] [drm] Initialized etnaviv 1.1.0 20151214 for
gpu-subsystem on minor 0
[    8.689356] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    8.689370] [drm] No driver support for vblank timestamp query.
[    8.690733] imx-drm display-subsystem: bound imx-ipuv3-crtc.2 (ops
ipu_crtc_ops [imxdrm])
[    8.691023] imx-drm display-subsystem: bound imx-ipuv3-crtc.3 (ops
ipu_crtc_ops [imxdrm])
[    8.691264] imx-drm display-subsystem: bound imx-ipuv3-crtc.6 (ops
ipu_crtc_ops [imxdrm])
[    8.691507] imx-drm display-subsystem: bound imx-ipuv3-crtc.7 (ops
ipu_crtc_ops [imxdrm])
[    8.693485] dwhdmi-imx 120000.hdmi: Detected HDMI TX controller
v1.30a with HDCP (DWC HDMI 3D TX PHY)
[    8.698677] imx-spdif sound-spdif: snd-soc-dummy-dai <->
2004000.spdif mapping ok
[    8.705511] hdmi_set_clk_regenerator:521: dwhdmi-imx 120000.hdmi:
hdmi_set_clk_regenerator: fs=48000Hz ftdms=74.250MHz N=6144 cts=74250
[    8.706051] dw_hdmi_irq:2146: dwhdmi-imx 120000.hdmi: EVENT=plugin
[    8.707851] imx-drm display-subsystem: bound 120000.hdmi (ops
dw_hdmi_imx_ops [dw_hdmi_imx])
[    8.713970] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[    8.777150] dw_hdmi_setup:1679: dwhdmi-imx 120000.hdmi: Non-CEA
mode used in HDMI
[    8.777179] hdmi_av_composer:1495: dwhdmi-imx 120000.hdmi: final
pixclk = 173106000
[    8.777237] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[    8.817180] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[    8.817214] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[    8.830554] fsl-asoc-card sound: sgtl5000 <-> 2028000.ssi mapping ok
[    8.846647] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[    8.846701] dw_hdmi_setup:1744: dwhdmi-imx 120000.hdmi:
dw_hdmi_setup DVI mode
[    8.872936] Console: switching to colour frame buffer device 240x67
[    8.959468] imx-drm display-subsystem: fb0:  frame buffer device
[    9.042175] [drm] Initialized imx-drm 1.0.0 20120507 for
display-subsystem on minor 1
[   10.078736] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[   11.603962] fec 2188000.ethernet eth0: Link is Up - 1Gbps/Full -
flow control rx/tx
[   11.604795] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   13.690715] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[   13.691803] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[   13.728314] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[   13.736954] dw_hdmi_setup:1679: dwhdmi-imx 120000.hdmi: Non-CEA
mode used in HDMI
[   13.736975] hdmi_av_composer:1495: dwhdmi-imx 120000.hdmi: final
pixclk = 65000000
[   13.737021] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[   13.748240] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[   13.748269] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[   13.759760] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[   13.759841] dw_hdmi_setup:1744: dwhdmi-imx 120000.hdmi:
dw_hdmi_setup DVI mode

On Thu, Nov 9, 2017 at 10:52 AM, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
> Hi,
>
> I've just applied the referred individual patch to kernel-4.14-rc5 and
> the EDID isn't loaded. dw-hdmi gets no firmware at all.
>
> #cat /proc/cmdline
> console=ttymxc0,115200 root=/dev/sda2 rw video=HDMI-A-1:1920x1080M at 60
> drm.edid_firmware=edid/ktc_edid.bin dw_hdmi.dyndbg=+pfl cma=128M
>
> #zcat /proc/config.gz  | grep EDID
> CONFIG_DRM_LOAD_EDID_FIRMWARE=y
> # CONFIG_FIRMWARE_EDID is not set
>
> #cat /sys/class/drm/card1-HDMI-A-1/edid
> <empty>
>
> #dmesg
> ...
> [    8.815238] imx-drm display-subsystem: bound imx-ipuv3-crtc.2 (ops
> ipu_crtc_ops [imxdrm])
> [    8.815555] imx-drm display-subsystem: bound imx-ipuv3-crtc.3 (ops
> ipu_crtc_ops [imxdrm])
> [    8.815832] imx-drm display-subsystem: bound imx-ipuv3-crtc.6 (ops
> ipu_crtc_ops [imxdrm])
> [    8.816073] imx-drm display-subsystem: bound imx-ipuv3-crtc.7 (ops
> ipu_crtc_ops [imxdrm])
> [    8.818243] dwhdmi-imx 120000.hdmi: Detected HDMI TX controller
> v1.30a with HDCP (DWC HDMI 3D TX PHY)
> [    8.821780] hdmi_set_clk_regenerator:521: dwhdmi-imx 120000.hdmi:
> hdmi_set_clk_regenerator: fs=48000Hz ftdms=74.250MHz N=6144 cts=74250
> [    8.831034] imx-drm display-subsystem: bound 120000.hdmi (ops
> dw_hdmi_imx_ops [dw_hdmi_imx])
> [    8.832218] [drm] Cannot find any crtc or sizes
> [    8.839807] [drm] Initialized imx-drm 1.0.0 20120507 for
> display-subsystem on minor 1
>
> Regards,
> Lu?s Mendes
>
> On Thu, Nov 9, 2017 at 9:51 AM, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
>> Hi everyone,
>>
>> I can try that patch and see if it fixes the problem.
>> Give me a moment so that I can check how it goes.
>>
>> Lu?s
>>
>>
>>
>> On Thu, Nov 9, 2017 at 9:49 AM, Jani Nikula <jani.nikula@linux.intel.com>
>> wrote:
>>>
>>> On Thu, 09 Nov 2017, Russell King - ARM Linux <linux@armlinux.org.uk>
>>> wrote:
>>> > On Thu, Nov 09, 2017 at 09:23:18AM +0100, Daniel Vetter wrote:
>>> >> On Tue, Nov 07, 2017 at 11:27:21AM +0000, Russell King wrote:
>>> >> > Parsing the EDID for HDMI and audio information in the get_modes()
>>> >> > callback is incorrect - this only parses the EDID read from the
>>> >> > connector, not any override or firmware provided EDID.
>>> >> >
>>> >> > The correct place to parse the EDID for these parameters is the
>>> >> > fill_modes() callback, after we've called the helper.  Move the
>>> >> > parsing
>>> >> > there.  This caused problems for Lu?s Mendes.
>>> >> >
>>> >> > Cc: <stable@vger.kernel.org>
>>> >> > Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
>>> >> > Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
>>> >> > Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
>>> >> > ---
>>> >> >  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28
>>> >> > ++++++++++++++++++++++++----
>>> >> >  1 file changed, 24 insertions(+), 4 deletions(-)
>>> >> >
>>> >> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>> >> > b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>> >> > index 9fe407f49986..2516a1c18a10 100644
>>> >> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>> >> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
>>> >> > @@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct
>>> >> > drm_connector *connector)
>>> >> >            dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
>>> >> >                    edid->width_cm, edid->height_cm);
>>> >> >
>>> >> > -          hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
>>> >> > -          hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>>> >> >            drm_mode_connector_update_edid_property(connector, edid);
>>> >> > -          cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier,
>>> >> > edid);
>>> >> >            ret = drm_add_edid_modes(connector, edid);
>>> >> >            /* Store the ELD */
>>> >> >            drm_edid_to_eld(connector, edid);
>>> >> > @@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct
>>> >> > drm_connector *connector)
>>> >> >    return ret;
>>> >> >  }
>>> >> >
>>> >> > +static int dw_hdmi_connector_fill_modes(struct drm_connector
>>> >> > *connector,
>>> >> > +                                  uint32_t maxX, uint32_t maxY)
>>> >> > +{
>>> >> > +  struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
>>> >> > +                                      connector);
>>> >> > +  int ret;
>>> >> > +
>>> >> > +  ret = drm_helper_probe_single_connector_modes(connector, maxX,
>>> >> > maxY);
>>> >> > +
>>> >> > +  if (connector->edid_blob_ptr) {
>>> >> > +          struct edid *edid = (void
>>> >> > *)connector->edid_blob_ptr->data;
>>> >> > +
>>> >> > +          hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
>>> >> > +          hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>>> >> > +          cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier,
>>> >> > edid);
>>> >> > +  } else {
>>> >> > +          hdmi->sink_is_hdmi = false;
>>> >> > +          hdmi->sink_has_audio = false;
>>> >> > +  }
>>> >> > +
>>> >> > +  return ret;
>>> >> > +}
>>> >> > +
>>> >> >  static void dw_hdmi_connector_force(struct drm_connector *connector)
>>> >> >  {
>>> >> >    struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
>>> >> > @@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct
>>> >> > drm_connector *connector)
>>> >> >  }
>>> >> >
>>> >> >  static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
>>> >> > -  .fill_modes = drm_helper_probe_single_connector_modes,
>>> >> > +  .fill_modes = dw_hdmi_connector_fill_modes,
>>> >>
>>> >> Papering over helper functions shouldn't be necessary, except the
>>> >> helper
>>> >> functions not handling the override edid is a known issue. Jani Nikula
>>> >> is
>>> >> working on a proper fix, please coordinate with him.
>>> >
>>> > So, what you're basically saying is that fixing real bugs that affect
>>> > users is not something that DRM people want.  That's fine, I'll ignore
>>> > people who come to me for help with DRM bugs in future then because
>>> > it's obviously a dead loss.
>>>
>>> We may already have fixed the bug in drm-next at the proper
>>> layer. Please see my other mail.
>>>
>>> BR,
>>> Jani.
>>>
>>> --
>>> Jani Nikula, Intel Open Source Technology Center
>>
>>

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Jani Nikula]

On Thu, 09 Nov 2017, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
> I've just applied the referred individual patch to kernel-4.14-rc5 and
> the EDID isn't loaded. dw-hdmi gets no firmware at all.

Sorry, I didn't mean you could just cherry-pick that one commit and make
it work. There were a number of preparatory patches before that, and I
think some cleanups on top.

Please try drm-next to make sure you have it all.

We didn't intend for the commits to be backported, instead we very much
wanted them to get a gradually increasing amount of exposure first to
make sure we don't break stuff.

And as I said elsewhere in the thread, Russell's patch may be relevant
for current Linus' master and stable. We just need to reconciliate how
the two things should work together in drm-next and v4.15 and on.

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Technology Center

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Luís Mendes]

Hi Jani,

I tried:
git clone git://people.freedesktop.org/~airlied/linux -b drm-next
--depth=1 --single-branch

I got this:
EDID isn't loaded from file

# cat /proc/cmdline
console=ttymxc0,115200 root=/dev/sda2 rw video=HDMI-A-1:1920x1080M at 60
drm.edid_firmware=edid/ktc_edid.bin dw_hdmi.dyndbg=+pfl cma=128M

#zcat /proc/config.gz  | grep EDID
CONFIG_DRM_LOAD_EDID_FIRMWARE=y
# CONFIG_FIRMWARE_EDID is not set

#cat /sys/class/drm/card1-HDMI-A-1/edid
<empty>

dmesg output follows below...

Regards,
Lu?s Mendes

[    7.381500] dwhdmi-imx 120000.hdmi: Detected HDMI TX controller
v1.30a with HDCP (DWC HDMI 3D TX PHY)
[    7.409108] hdmi_set_clk_regenerator:521: dwhdmi-imx 120000.hdmi:
hdmi_set_clk_regenerator: fs=48000Hz ftdms=74.250MHz N=6144 cts=74250
[    7.411001] dw_hdmi_irq:2146: dwhdmi-imx 120000.hdmi: EVENT=plugin
[    7.421524] imx-drm display-subsystem: bound 120000.hdmi (ops
dw_hdmi_imx_ops [dw_hdmi_imx])
[    7.481948] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[    7.537018] fsl-asoc-card sound: sgtl5000 <-> 2028000.ssi mapping ok
[    7.549254] ------------[ cut here ]------------
[    7.549303] WARNING: CPU: 2 PID: 219 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    7.549308] This function requires support for accurate vblank timestamps.
[    7.549312] Modules linked in: snd_soc_imx_spdif(+)
snd_soc_fsl_asoc_card(+) snd_ac97_codec coda videobuf2_dma_contig
imx_vdoa v4l2_mem2mem videobuf2_vmalloc videobuf2_memops dw_hdmi_imx
imxdrm(+) dw_hdmi cec etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev
lp parport
[    7.549396] CPU: 2 PID: 219 Comm: systemd-udevd Tainted: G        W
      4.14.0-rc7-gd65d313-dirty #1
[    7.549401] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    7.549405] Backtrace:
[    7.549427] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    7.549436]  r7:c106eed0 r6:00000000 r5:600d0193 r4:c106eed0
[    7.549465] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    7.549486] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    7.549496]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    7.549501]  r4:edd15688 r3:00000000
[    7.549514] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    7.549523]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    7.549535] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    7.549540]  r3:00000000 r2:c0d50064
[    7.549544]  r4:edc2f000
[    7.549553] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    7.549560]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:eeb3e400
[    7.549614] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    7.549620]  r5:eeb3e680 r4:edc2b018
[    7.549653] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    7.549660]  r5:eeb3e680 r4:00000018
[    7.549682] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    7.549691]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:eeb3e680 r5:bf0ab088
[    7.549695]  r4:eeb3e680
[    7.549723] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    7.549732]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    7.549737]  r4:eeb3e680 r3:bf0a8174
[    7.549762] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    7.549780]  r5:00000000 r4:eeb3e680
[    7.549820] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    7.549843]  r7:eeb3e680 r6:edc2f000 r5:eeb3e680 r4:00000000
[    7.549865] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    7.549874]  r7:eeb3e680 r6:00000001 r5:0000003f r4:000000a0
[    7.549886] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c0501724>] (restore_fbdev_mode+0x30/0x168)
[    7.549895]  r10:edf57800 r9:c17e5a70 r8:00000000 r7:edf56e00
r6:c17e5bc8 r5:edf56ed0
[    7.549899]  r4:edf56e00
[    7.549914] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
[    7.549925]  r10:edf57800 r9:c17e5a70 r8:00000000 r7:c1022ed8
r6:c17e5bc8 r5:edf56ed0
[    7.549931]  r4:edf56e00
[    7.549943] [<c0504718>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c0504834>]
(drm_fb_helper_set_par+0x5c/0x8c)
[    7.549950]  r7:c1022ed8 r6:c17e5bc8 r5:edfe3400 r4:00000000
[    7.549972] [<c05047d8>] (drm_fb_helper_set_par) from [<c0496768>]
(fbcon_init+0x564/0x5b0)
[    7.549977]  r5:edfe3400 r4:ee808c00
[    7.549992] [<c0496204>] (fbcon_init) from [<c04daae8>]
(visual_init+0xcc/0x114)
[    7.550001]  r10:00000001 r9:ee808c00 r8:c17ebfb4 r7:00000000
r6:ee808e08 r5:00000000
[    7.550005]  r4:ee808c00
[    7.550016] [<c04daa1c>] (visual_init) from [<c04dc12c>]
(do_bind_con_driver+0x1b4/0x394)
[    7.550023]  r7:00000000 r6:00000000 r5:c17ebea0 r4:c0b3e0dc
[    7.550033] [<c04dbf78>] (do_bind_con_driver) from [<c04dc700>]
(do_take_over_console+0x15c/0x1c4)
[    7.550041]  r10:00000001 r9:0000003e r8:00000000 r7:c17ebeb0
r6:00000000 r5:00000000
[    7.550045]  r4:00000000
[    7.550057] [<c04dc5a4>] (do_take_over_console) from [<c0496830>]
(do_fbcon_takeover+0x7c/0xd4)
[    7.550065]  r10:edfe3694 r9:edfe3400 r8:00000000 r7:00000000
r6:00000005 r5:c17e5a70
[    7.550069]  r4:c1022ed8
[    7.550080] [<c04967b4>] (do_fbcon_takeover) from [<c049a2d0>]
(fbcon_event_notify+0x8c8/0x908)
[    7.550086]  r5:c1022ed8 r4:c17e5a70
[    7.550105] [<c0499a08>] (fbcon_event_notify) from [<c0147b5c>]
(notifier_call_chain+0x4c/0x8c)
[    7.550114]  r10:edfe3694 r9:edfe340c r8:00000000 r7:00000000
r6:00000005 r5:edd15ab0
[    7.550118]  r4:ffffffff
[    7.550129] [<c0147b10>] (notifier_call_chain) from [<c0147fec>]
(__blocking_notifier_call_chain+0x50/0x68)
[    7.550138]  r9:edfe340c r8:c17e5a38 r7:ffffffff r6:edd15ab0
r5:c1022cfc r4:00000005
[    7.550150] [<c0147f9c>] (__blocking_notifier_call_chain) from
[<c0148024>] (blocking_notifier_call_chain+0x20/0x28)
[    7.550156]  r7:00000000 r6:c1007f10 r5:edfe3400 r4:c1007f10
[    7.550178] [<c0148004>] (blocking_notifier_call_chain) from
[<c048b8fc>] (fb_notifier_call_chain+0x20/0x24)
[    7.550188] [<c048b8dc>] (fb_notifier_call_chain) from [<c048d8a0>]
(register_framebuffer+0x1f8/0x2ac)
[    7.550206] [<c048d6a8>] (register_framebuffer) from [<c05043f4>]
(__drm_fb_helper_initial_config_and_unlock+0x220/0x414)
[    7.550214]  r10:bf0a855c r9:00000000 r8:00000000 r7:c1031728
r6:edc2f000 r5:edfe3400
[    7.550218]  r4:edf56e00
[    7.550230] [<c05041d4>]
(__drm_fb_helper_initial_config_and_unlock) from [<c0504628>]
(drm_fb_helper_initial_config+0x40/0x44)
[    7.550238]  r10:bf0a855c r9:c1031d28 r8:00000010 r7:c0b450e0
r6:edc2f000 r5:00000010
[    7.550242]  r4:edf56e00
[    7.550253] [<c05045e8>] (drm_fb_helper_initial_config) from
[<c0504a9c>] (drm_fbdev_cma_init_with_funcs+0x88/0x100)
[    7.550258]  r5:00000000 r4:edf56e00
[    7.550269] [<c0504a14>] (drm_fbdev_cma_init_with_funcs) from
[<c0504b28>] (drm_fbdev_cma_init+0x14/0x1c)
[    7.550277]  r9:c1031d28 r8:00000000 r7:ed638c90 r6:eea12010
r5:bf0ac000 r4:edc2f000
[    7.550314] [<c0504b14>] (drm_fbdev_cma_init) from [<bf0a83e4>]
(imx_drm_bind+0xf4/0x178 [imxdrm])
[    7.550346] [<bf0a82f0>] (imx_drm_bind [imxdrm]) from [<c0532e7c>]
(try_to_bring_up_master+0x25c/0x2dc)
[    7.550355]  r9:c1031d28 r8:ed638450 r7:ed638940 r6:00000008
r5:000000a0 r4:ed4d9580
[    7.550367] [<c0532c20>] (try_to_bring_up_master) from [<c0532fac>]
(component_add+0xb0/0x178)
[    7.550375]  r10:00000000 r9:bf0ac160 r8:00000000 r7:ed638ac0
r6:c1031d20 r5:00000000
[    7.550380]  r4:ed638940
[    7.550412] [<c0532efc>] (component_add) from [<bf0a8f2c>]
(ipu_drm_probe+0x80/0xa4 [imxdrm])
[    7.550439]  r9:bf0ac160 r8:00000000 r7:fffffdfb r6:bf0ac160
r5:eddcfc10 r4:eddcfde0
[    7.550499] [<bf0a8eac>] (ipu_drm_probe [imxdrm]) from [<c053b140>]
(platform_drv_probe+0x58/0xb8)
[    7.550508]  r5:ffffffed r4:eddcfc10
[    7.550522] [<c053b0e8>] (platform_drv_probe) from [<c053926c>]
(driver_probe_device+0x2d0/0x47c)
[    7.550529]  r7:c17ee208 r6:c1075608 r5:c17ee204 r4:eddcfc10
[    7.550542] [<c0538f9c>] (driver_probe_device) from [<c0539524>]
(__driver_attach+0x10c/0x128)
[    7.550551]  r10:bf0ac280 r9:c053b0e8 r8:00000000 r7:c1075530
r6:bf0ac160 r5:eddcfc44
[    7.550555]  r4:eddcfc10
[    7.550564] [<c0539418>] (__driver_attach) from [<c0537160>]
(bus_for_each_dev+0x70/0xa4)
[    7.550572]  r7:c1075530 r6:c0539418 r5:bf0ac160 r4:00000000
[    7.550582] [<c05370f0>] (bus_for_each_dev) from [<c0538a58>]
(driver_attach+0x24/0x28)
[    7.550588]  r6:c1032490 r5:edd76c00 r4:bf0ac160
[    7.550598] [<c0538a34>] (driver_attach) from [<c0538438>]
(bus_add_driver+0x1ac/0x26c)
[    7.550611] [<c053828c>] (bus_add_driver) from [<c0539f80>]
(driver_register+0x80/0xfc)
[    7.550618]  r8:c053b0a4 r7:c053aa50 r6:c1075830 r5:00000001 r4:bf0ac160
[    7.550629] [<c0539f00>] (driver_register) from [<c053b2ac>]
(__platform_register_drivers+0x80/0x164)
[    7.550634]  r5:00000001 r4:bf0ab090
[    7.550664] [<c053b22c>] (__platform_register_drivers) from
[<bf0b0020>] (imx_drm_init+0x20/0x1000 [imxdrm])
[    7.550672]  r10:edd15f40 r9:edeb9070 r8:bf0ac2c8 r7:edeb9980
r6:00000000 r5:bf0b0000
[    7.550676]  r4:ffffe000
[    7.550701] [<bf0b0000>] (imx_drm_init [imxdrm]) from [<c0101ba4>]
(do_one_initcall+0x4c/0x174)
[    7.550717] [<c0101b58>] (do_one_initcall) from [<c01b0880>]
(do_init_module+0x68/0x1fc)
[    7.550725]  r9:edeb9070 r8:bf0ac2c8 r6:bf0ac280 r5:00000001 r4:bf0ac280
[    7.550735] [<c01b0818>] (do_init_module) from [<c01af89c>]
(load_module+0x2064/0x270c)
[    7.550741]  r7:edeb9040 r6:bf0ac280 r5:00000001 r4:00000001
[    7.550750] [<c01ad838>] (load_module) from [<c01b01c4>]
(SyS_finit_module+0xbc/0xf8)
[    7.550759]  r10:00000000 r9:edd14000 r8:c0108da4 r7:0000017b
r6:b6e24d40 r5:0000000f
[    7.550764]  r4:00000000
[    7.550776] [<c01b0108>] (SyS_finit_module) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[    7.550781]  r6:00000000 r5:bebb39f4 r4:7778f500
[    7.550790] ---[ end trace 3e19c988c4369e1b ]---
[    7.590815] imx-spdif sound-spdif: snd-soc-dummy-dai <->
2004000.spdif mapping ok
[    7.616586] dw_hdmi_setup:1679: dwhdmi-imx 120000.hdmi: Non-CEA
mode used in HDMI
[    7.616616] hdmi_av_composer:1495: dwhdmi-imx 120000.hdmi: final
pixclk = 173106000
[    7.616670] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[    7.678961] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[    7.678991] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[    7.733710] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[    7.733749] dw_hdmi_setup:1744: dwhdmi-imx 120000.hdmi:
dw_hdmi_setup DVI mode
[    7.734455] ------------[ cut here ]------------
[    7.734483] WARNING: CPU: 2 PID: 219 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    7.734491] This function requires support for accurate vblank timestamps.
[    7.734495] Modules linked in: snd_soc_imx_sgtl5000
snd_soc_imx_spdif snd_soc_fsl_asoc_card snd_ac97_codec coda
videobuf2_dma_contig imx_vdoa v4l2_mem2mem videobuf2_vmalloc
videobuf2_memops dw_hdmi_imx imxdrm(+) dw_hdmi cec etnaviv imx_ipu_v3
binfmt_misc parport_pc ppdev lp parport
[    7.734575] CPU: 2 PID: 219 Comm: systemd-udevd Tainted: G        W
      4.14.0-rc7-gd65d313-dirty #1
[    7.734580] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    7.734584] Backtrace:
[    7.734601] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    7.734609]  r7:c106eed0 r6:00000000 r5:600f0093 r4:c106eed0
[    7.734627] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    7.734643] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    7.734652]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    7.734657]  r4:edd15520 r3:00000000
[    7.734667] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    7.734675]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    7.734686] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    7.734691]  r3:00000000 r2:c0d50064
[    7.734695]  r4:edc2f000
[    7.734705] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    7.734711]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edeb5b00
[    7.734751] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    7.734757]  r5:edeb5700 r4:edc2b018
[    7.734785] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    7.734791]  r5:edeb5700 r4:00000018
[    7.734811] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    7.734821]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:edeb5700 r5:bf0ab088
[    7.734825]  r4:edeb5700
[    7.734848] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    7.734857]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    7.734862]  r4:edeb5700 r3:bf0a8174
[    7.734872] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    7.734878]  r5:00000000 r4:edeb5700
[    7.734895] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    7.734902]  r7:edeb5700 r6:edc2f000 r5:edeb5700 r4:00000000
[    7.734916] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    7.734922]  r7:edeb5700 r6:00000001 r5:0000003f r4:000000a0
[    7.734933] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[    7.734942]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[    7.734946]  r4:edf56e00
[    7.734966] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[    7.734974]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[    7.734979]  r4:edfe3400 r3:00000000
[    7.734993] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[    7.735002]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
r6:ee808c00 r5:edfe3400
[    7.735007]  r4:edf57800 r3:c049a648
[    7.735017] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[    7.735022]  r5:edfe3400 r4:ee808dc8
[    7.735034] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[    7.735043]  r10:00000000 r9:00000000 r8:fffffe20 r7:00000001
r6:00000000 r5:00000000
[    7.735047]  r4:ee808c00
[    7.735056] [<c04db4cc>] (redraw_screen) from [<c0496174>]
(fbcon_prepare_logo+0x354/0x3e4)
[    7.735064]  r8:fffffe20 r7:00000043 r6:00000000 r5:00000000 r4:ee808c00
[    7.735076] [<c0495e20>] (fbcon_prepare_logo) from [<c04965d4>]
(fbcon_init+0x3d0/0x5b0)
[    7.735084]  r10:edf57800 r9:c17e5a70 r8:c17e5bc8 r7:c1022ed8
r6:c17e5bc8 r5:edfe3400
[    7.735088]  r4:ee808c00
[    7.735097] [<c0496204>] (fbcon_init) from [<c04daae8>]
(visual_init+0xcc/0x114)
[    7.735105]  r10:00000001 r9:ee808c00 r8:c17ebfb4 r7:00000000
r6:ee808e08 r5:00000000
[    7.735109]  r4:ee808c00
[    7.735118] [<c04daa1c>] (visual_init) from [<c04dc12c>]
(do_bind_con_driver+0x1b4/0x394)
[    7.735125]  r7:00000000 r6:00000000 r5:c17ebea0 r4:c0b3e0dc
[    7.735135] [<c04dbf78>] (do_bind_con_driver) from [<c04dc700>]
(do_take_over_console+0x15c/0x1c4)
[    7.735143]  r10:00000001 r9:0000003e r8:00000000 r7:c17ebeb0
r6:00000000 r5:00000000
[    7.735147]  r4:00000000
[    7.735156] [<c04dc5a4>] (do_take_over_console) from [<c0496830>]
(do_fbcon_takeover+0x7c/0xd4)
[    7.735164]  r10:edfe3694 r9:edfe3400 r8:00000000 r7:00000000
r6:00000005 r5:c17e5a70
[    7.735168]  r4:c1022ed8
[    7.735178] [<c04967b4>] (do_fbcon_takeover) from [<c049a2d0>]
(fbcon_event_notify+0x8c8/0x908)
[    7.735183]  r5:c1022ed8 r4:c17e5a70
[    7.735200] [<c0499a08>] (fbcon_event_notify) from [<c0147b5c>]
(notifier_call_chain+0x4c/0x8c)
[    7.735208]  r10:edfe3694 r9:edfe340c r8:00000000 r7:00000000
r6:00000005 r5:edd15ab0
[    7.735212]  r4:ffffffff
[    7.735223] [<c0147b10>] (notifier_call_chain) from [<c0147fec>]
(__blocking_notifier_call_chain+0x50/0x68)
[    7.735232]  r9:edfe340c r8:c17e5a38 r7:ffffffff r6:edd15ab0
r5:c1022cfc r4:00000005
[    7.735242] [<c0147f9c>] (__blocking_notifier_call_chain) from
[<c0148024>] (blocking_notifier_call_chain+0x20/0x28)
[    7.735248]  r7:00000000 r6:c1007f10 r5:edfe3400 r4:c1007f10
[    7.735260] [<c0148004>] (blocking_notifier_call_chain) from
[<c048b8fc>] (fb_notifier_call_chain+0x20/0x24)
[    7.735272] [<c048b8dc>] (fb_notifier_call_chain) from [<c048d8a0>]
(register_framebuffer+0x1f8/0x2ac)
[    7.735289] [<c048d6a8>] (register_framebuffer) from [<c05043f4>]
(__drm_fb_helper_initial_config_and_unlock+0x220/0x414)
[    7.735297]  r10:bf0a855c r9:00000000 r8:00000000 r7:c1031728
r6:edc2f000 r5:edfe3400
[    7.735301]  r4:edf56e00
[    7.735315] [<c05041d4>]
(__drm_fb_helper_initial_config_and_unlock) from [<c0504628>]
(drm_fb_helper_initial_config+0x40/0x44)
[    7.735323]  r10:bf0a855c r9:c1031d28 r8:00000010 r7:c0b450e0
r6:edc2f000 r5:00000010
[    7.735327]  r4:edf56e00
[    7.735339] [<c05045e8>] (drm_fb_helper_initial_config) from
[<c0504a9c>] (drm_fbdev_cma_init_with_funcs+0x88/0x100)
[    7.735345]  r5:00000000 r4:edf56e00
[    7.735356] [<c0504a14>] (drm_fbdev_cma_init_with_funcs) from
[<c0504b28>] (drm_fbdev_cma_init+0x14/0x1c)
[    7.735364]  r9:c1031d28 r8:00000000 r7:ed638c90 r6:eea12010
r5:bf0ac000 r4:edc2f000
[    7.735394] [<c0504b14>] (drm_fbdev_cma_init) from [<bf0a83e4>]
(imx_drm_bind+0xf4/0x178 [imxdrm])
[    7.735422] [<bf0a82f0>] (imx_drm_bind [imxdrm]) from [<c0532e7c>]
(try_to_bring_up_master+0x25c/0x2dc)
[    7.735431]  r9:c1031d28 r8:ed638450 r7:ed638940 r6:00000008
r5:000000a0 r4:ed4d9580
[    7.735441] [<c0532c20>] (try_to_bring_up_master) from [<c0532fac>]
(component_add+0xb0/0x178)
[    7.735449]  r10:00000000 r9:bf0ac160 r8:00000000 r7:ed638ac0
r6:c1031d20 r5:00000000
[    7.735453]  r4:ed638940
[    7.735473] [<c0532efc>] (component_add) from [<bf0a8f2c>]
(ipu_drm_probe+0x80/0xa4 [imxdrm])
[    7.735482]  r9:bf0ac160 r8:00000000 r7:fffffdfb r6:bf0ac160
r5:eddcfc10 r4:eddcfde0
[    7.735510] [<bf0a8eac>] (ipu_drm_probe [imxdrm]) from [<c053b140>]
(platform_drv_probe+0x58/0xb8)
[    7.735516]  r5:ffffffed r4:eddcfc10
[    7.735530] [<c053b0e8>] (platform_drv_probe) from [<c053926c>]
(driver_probe_device+0x2d0/0x47c)
[    7.735537]  r7:c17ee208 r6:c1075608 r5:c17ee204 r4:eddcfc10
[    7.735548] [<c0538f9c>] (driver_probe_device) from [<c0539524>]
(__driver_attach+0x10c/0x128)
[    7.735556]  r10:bf0ac280 r9:c053b0e8 r8:00000000 r7:c1075530
r6:bf0ac160 r5:eddcfc44
[    7.735560]  r4:eddcfc10
[    7.735570] [<c0539418>] (__driver_attach) from [<c0537160>]
(bus_for_each_dev+0x70/0xa4)
[    7.735577]  r7:c1075530 r6:c0539418 r5:bf0ac160 r4:00000000
[    7.735586] [<c05370f0>] (bus_for_each_dev) from [<c0538a58>]
(driver_attach+0x24/0x28)
[    7.735594]  r6:c1032490 r5:edd76c00 r4:bf0ac160
[    7.735604] [<c0538a34>] (driver_attach) from [<c0538438>]
(bus_add_driver+0x1ac/0x26c)
[    7.735614] [<c053828c>] (bus_add_driver) from [<c0539f80>]
(driver_register+0x80/0xfc)
[    7.735621]  r8:c053b0a4 r7:c053aa50 r6:c1075830 r5:00000001 r4:bf0ac160
[    7.735632] [<c0539f00>] (driver_register) from [<c053b2ac>]
(__platform_register_drivers+0x80/0x164)
[    7.735637]  r5:00000001 r4:bf0ab090
[    7.735663] [<c053b22c>] (__platform_register_drivers) from
[<bf0b0020>] (imx_drm_init+0x20/0x1000 [imxdrm])
[    7.735671]  r10:edd15f40 r9:edeb9070 r8:bf0ac2c8 r7:edeb9980
r6:00000000 r5:bf0b0000
[    7.735675]  r4:ffffe000
[    7.735698] [<bf0b0000>] (imx_drm_init [imxdrm]) from [<c0101ba4>]
(do_one_initcall+0x4c/0x174)
[    7.735715] [<c0101b58>] (do_one_initcall) from [<c01b0880>]
(do_init_module+0x68/0x1fc)
[    7.735723]  r9:edeb9070 r8:bf0ac2c8 r6:bf0ac280 r5:00000001 r4:bf0ac280
[    7.735732] [<c01b0818>] (do_init_module) from [<c01af89c>]
(load_module+0x2064/0x270c)
[    7.735739]  r7:edeb9040 r6:bf0ac280 r5:00000001 r4:00000001
[    7.735748] [<c01ad838>] (load_module) from [<c01b01c4>]
(SyS_finit_module+0xbc/0xf8)
[    7.735757]  r10:00000000 r9:edd14000 r8:c0108da4 r7:0000017b
r6:b6e24d40 r5:0000000f
[    7.735761]  r4:00000000
[    7.735776] [<c01b0108>] (SyS_finit_module) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[    7.735782]  r6:00000000 r5:bebb39f4 r4:7778f500
[    7.735788] ---[ end trace 3e19c988c4369e1c ]---
[    7.748484] Console: switching to colour frame buffer device 240x67
[    7.799927] ------------[ cut here ]------------
[    7.799956] WARNING: CPU: 2 PID: 219 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    7.799962] This function requires support for accurate vblank timestamps.
[    7.799966] Modules linked in: snd_soc_imx_sgtl5000
snd_soc_imx_spdif snd_soc_fsl_asoc_card snd_ac97_codec coda
videobuf2_dma_contig imx_vdoa v4l2_mem2mem videobuf2_vmalloc
videobuf2_memops dw_hdmi_imx imxdrm(+) dw_hdmi cec etnaviv imx_ipu_v3
binfmt_misc parport_pc ppdev lp parport
[    7.800052] CPU: 2 PID: 219 Comm: systemd-udevd Tainted: G        W
      4.14.0-rc7-gd65d313-dirty #1
[    7.800057] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    7.800061] Backtrace:
[    7.800081] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    7.800090]  r7:c106eed0 r6:00000000 r5:600f0093 r4:c106eed0
[    7.800115] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    7.800134] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    7.800143]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    7.800148]  r4:edd155f0 r3:00000000
[    7.800158] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    7.800166]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    7.800177] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    7.800182]  r3:00000000 r2:c0d50064
[    7.800186]  r4:edc2f000
[    7.800196] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    7.800203]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edd94900
[    7.800249] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    7.800257]  r5:edeb6480 r4:edc2b018
[    7.800304] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    7.800323]  r5:edeb6480 r4:00000018
[    7.800360] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    7.800374]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:edeb6480 r5:bf0ab088
[    7.800386]  r4:edeb6480
[    7.800424] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    7.800446]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    7.800459]  r4:edeb6480 r3:bf0a8174
[    7.800471] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    7.800477]  r5:00000000 r4:edeb6480
[    7.800497] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    7.800513]  r7:edeb6480 r6:edc2f000 r5:edeb6480 r4:00000000
[    7.800541] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    7.800559]  r7:edeb6480 r6:00000001 r5:0000003f r4:000000a0
[    7.800579] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[    7.800601]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[    7.800617]  r4:edf56e00
[    7.800661] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[    7.800688]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[    7.800700]  r4:edfe3400 r3:00000000
[    7.800727] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[    7.800746]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
r6:ee808c00 r5:edfe3400
[    7.800763]  r4:edf57800 r3:c049a648
[    7.800793] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[    7.800810]  r5:edfe3400 r4:ee808dc8
[    7.800836] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[    7.800846]  r10:c17ebe94 r9:00000000 r8:c0d3ede8 r7:00000001
r6:00000000 r5:00000000
[    7.800857]  r4:ee808c00
[    7.800883] [<c04db4cc>] (redraw_screen) from [<c04dc234>]
(do_bind_con_driver+0x2bc/0x394)
[    7.800902]  r8:c0d3ede8 r7:00000001 r6:00000000 r5:c17ebe94 r4:00000000
[    7.800926] [<c04dbf78>] (do_bind_con_driver) from [<c04dc700>]
(do_take_over_console+0x15c/0x1c4)
[    7.800949]  r10:00000001 r9:0000003e r8:00000000 r7:c17ebeb0
r6:00000000 r5:00000000
[    7.800957]  r4:00000000
[    7.800969] [<c04dc5a4>] (do_take_over_console) from [<c0496830>]
(do_fbcon_takeover+0x7c/0xd4)
[    7.800979]  r10:edfe3694 r9:edfe3400 r8:00000000 r7:00000000
r6:00000005 r5:c17e5a70
[    7.800983]  r4:c1022ed8
[    7.800994] [<c04967b4>] (do_fbcon_takeover) from [<c049a2d0>]
(fbcon_event_notify+0x8c8/0x908)
[    7.801000]  r5:c1022ed8 r4:c17e5a70
[    7.801028] [<c0499a08>] (fbcon_event_notify) from [<c0147b5c>]
(notifier_call_chain+0x4c/0x8c)
[    7.801049]  r10:edfe3694 r9:edfe340c r8:00000000 r7:00000000
r6:00000005 r5:edd15ab0
[    7.801060]  r4:ffffffff
[    7.801090] [<c0147b10>] (notifier_call_chain) from [<c0147fec>]
(__blocking_notifier_call_chain+0x50/0x68)
[    7.801110]  r9:edfe340c r8:c17e5a38 r7:ffffffff r6:edd15ab0
r5:c1022cfc r4:00000005
[    7.801123] [<c0147f9c>] (__blocking_notifier_call_chain) from
[<c0148024>] (blocking_notifier_call_chain+0x20/0x28)
[    7.801130]  r7:00000000 r6:c1007f10 r5:edfe3400 r4:c1007f10
[    7.801143] [<c0148004>] (blocking_notifier_call_chain) from
[<c048b8fc>] (fb_notifier_call_chain+0x20/0x24)
[    7.801155] [<c048b8dc>] (fb_notifier_call_chain) from [<c048d8a0>]
(register_framebuffer+0x1f8/0x2ac)
[    7.801173] [<c048d6a8>] (register_framebuffer) from [<c05043f4>]
(__drm_fb_helper_initial_config_and_unlock+0x220/0x414)
[    7.801182]  r10:bf0a855c r9:00000000 r8:00000000 r7:c1031728
r6:edc2f000 r5:edfe3400
[    7.801187]  r4:edf56e00
[    7.801200] [<c05041d4>]
(__drm_fb_helper_initial_config_and_unlock) from [<c0504628>]
(drm_fb_helper_initial_config+0x40/0x44)
[    7.801209]  r10:bf0a855c r9:c1031d28 r8:00000010 r7:c0b450e0
r6:edc2f000 r5:00000010
[    7.801213]  r4:edf56e00
[    7.801225] [<c05045e8>] (drm_fb_helper_initial_config) from
[<c0504a9c>] (drm_fbdev_cma_init_with_funcs+0x88/0x100)
[    7.801230]  r5:00000000 r4:edf56e00
[    7.801241] [<c0504a14>] (drm_fbdev_cma_init_with_funcs) from
[<c0504b28>] (drm_fbdev_cma_init+0x14/0x1c)
[    7.801249]  r9:c1031d28 r8:00000000 r7:ed638c90 r6:eea12010
r5:bf0ac000 r4:edc2f000
[    7.801283] [<c0504b14>] (drm_fbdev_cma_init) from [<bf0a83e4>]
(imx_drm_bind+0xf4/0x178 [imxdrm])
[    7.801314] [<bf0a82f0>] (imx_drm_bind [imxdrm]) from [<c0532e7c>]
(try_to_bring_up_master+0x25c/0x2dc)
[    7.801323]  r9:c1031d28 r8:ed638450 r7:ed638940 r6:00000008
r5:000000a0 r4:ed4d9580
[    7.801333] [<c0532c20>] (try_to_bring_up_master) from [<c0532fac>]
(component_add+0xb0/0x178)
[    7.801341]  r10:00000000 r9:bf0ac160 r8:00000000 r7:ed638ac0
r6:c1031d20 r5:00000000
[    7.801345]  r4:ed638940
[    7.801366] [<c0532efc>] (component_add) from [<bf0a8f2c>]
(ipu_drm_probe+0x80/0xa4 [imxdrm])
[    7.801374]  r9:bf0ac160 r8:00000000 r7:fffffdfb r6:bf0ac160
r5:eddcfc10 r4:eddcfde0
[    7.801400] [<bf0a8eac>] (ipu_drm_probe [imxdrm]) from [<c053b140>]
(platform_drv_probe+0x58/0xb8)
[    7.801406]  r5:ffffffed r4:eddcfc10
[    7.801417] [<c053b0e8>] (platform_drv_probe) from [<c053926c>]
(driver_probe_device+0x2d0/0x47c)
[    7.801424]  r7:c17ee208 r6:c1075608 r5:c17ee204 r4:eddcfc10
[    7.801443] [<c0538f9c>] (driver_probe_device) from [<c0539524>]
(__driver_attach+0x10c/0x128)
[    7.801455]  r10:bf0ac280 r9:c053b0e8 r8:00000000 r7:c1075530
r6:bf0ac160 r5:eddcfc44
[    7.801460]  r4:eddcfc10
[    7.801480] [<c0539418>] (__driver_attach) from [<c0537160>]
(bus_for_each_dev+0x70/0xa4)
[    7.801496]  r7:c1075530 r6:c0539418 r5:bf0ac160 r4:00000000
[    7.801522] [<c05370f0>] (bus_for_each_dev) from [<c0538a58>]
(driver_attach+0x24/0x28)
[    7.801536]  r6:c1032490 r5:edd76c00 r4:bf0ac160
[    7.801548] [<c0538a34>] (driver_attach) from [<c0538438>]
(bus_add_driver+0x1ac/0x26c)
[    7.801566] [<c053828c>] (bus_add_driver) from [<c0539f80>]
(driver_register+0x80/0xfc)
[    7.801585]  r8:c053b0a4 r7:c053aa50 r6:c1075830 r5:00000001 r4:bf0ac160
[    7.801611] [<c0539f00>] (driver_register) from [<c053b2ac>]
(__platform_register_drivers+0x80/0x164)
[    7.801626]  r5:00000001 r4:bf0ab090
[    7.801665] [<c053b22c>] (__platform_register_drivers) from
[<bf0b0020>] (imx_drm_init+0x20/0x1000 [imxdrm])
[    7.801678]  r10:edd15f40 r9:edeb9070 r8:bf0ac2c8 r7:edeb9980
r6:00000000 r5:bf0b0000
[    7.801682]  r4:ffffe000
[    7.801721] [<bf0b0000>] (imx_drm_init [imxdrm]) from [<c0101ba4>]
(do_one_initcall+0x4c/0x174)
[    7.801759] [<c0101b58>] (do_one_initcall) from [<c01b0880>]
(do_init_module+0x68/0x1fc)
[    7.801787]  r9:edeb9070 r8:bf0ac2c8 r6:bf0ac280 r5:00000001 r4:bf0ac280
[    7.801815] [<c01b0818>] (do_init_module) from [<c01af89c>]
(load_module+0x2064/0x270c)
[    7.801835]  r7:edeb9040 r6:bf0ac280 r5:00000001 r4:00000001
[    7.801859] [<c01ad838>] (load_module) from [<c01b01c4>]
(SyS_finit_module+0xbc/0xf8)
[    7.801882]  r10:00000000 r9:edd14000 r8:c0108da4 r7:0000017b
r6:b6e24d40 r5:0000000f
[    7.801896]  r4:00000000
[    7.801927] [<c01b0108>] (SyS_finit_module) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[    7.801940]  r6:00000000 r5:bebb39f4 r4:7778f500
[    7.801947] ---[ end trace 3e19c988c4369e1d ]---
[    7.885327] imx-drm display-subsystem: fb0:  frame buffer device
[    7.937166] [drm] Initialized imx-drm 1.0.0 20120507 for
display-subsystem on minor 1
[    8.694540] ------------[ cut here ]------------
[    8.694576] WARNING: CPU: 0 PID: 464 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    8.694583] This function requires support for accurate vblank timestamps.
[    8.694587] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[    8.694682] CPU: 0 PID: 464 Comm: setfont Tainted: G        W
4.14.0-rc7-gd65d313-dirty #1
[    8.694687] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    8.694692] Backtrace:
[    8.694713] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    8.694722]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
[    8.694747] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    8.694766] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    8.694777]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    8.694783]  r4:ed5ab9f0 r3:00000000
[    8.694797] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    8.694809]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    8.694824] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    8.694831]  r3:00000000 r2:c0d50064
[    8.694835]  r4:edc2f000
[    8.694847] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    8.694856]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edd94880
[    8.694906] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    8.694916]  r5:edd94300 r4:edc2b018
[    8.694946] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    8.694951]  r5:edd94300 r4:00000018
[    8.694969] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    8.694980]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:edd94300 r5:bf0ab088
[    8.694984]  r4:edd94300
[    8.695007] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    8.695016]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    8.695021]  r4:edd94300 r3:bf0a8174
[    8.695031] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    8.695037]  r5:00000000 r4:edd94300
[    8.695054] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    8.695060]  r7:edd94300 r6:edc2f000 r5:edd94300 r4:00000000
[    8.695075] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    8.695082]  r7:edd94300 r6:00000001 r5:0000003f r4:000000a0
[    8.695093] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[    8.695101]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[    8.695106]  r4:edf56e00
[    8.695129] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[    8.695138]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[    8.695143]  r4:edfe3400 r3:00000000
[    8.695160] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[    8.695168]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
r6:ee808c00 r5:edfe3400
[    8.695173]  r4:edf57800 r3:c049a648
[    8.695183] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[    8.695188]  r5:edfe3400 r4:ee808dc8
[    8.695205] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[    8.695213]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
r6:c17e5a70 r5:00000000
[    8.695217]  r4:ee808c00
[    8.695230] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
(fbcon_do_set_font+0x1e0/0x27c)
[    8.695238]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:00000000 r4:ee808c00
[    8.695248] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
(fbcon_set_font+0x208/0x224)
[    8.695256]  r10:00001000 r9:0000003e r8:ed5abdd8 r7:20135b36
r6:c17ec890 r5:0000003f
[    8.695260]  r4:c17e7854
[    8.695272] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
(con_font_op+0x438/0x4f0)
[    8.695282]  r10:00000000 r9:010719c8 r8:00000000 r7:ee808c00
r6:00000001 r5:ee808c00
[    8.695285]  r4:ed5abe40
[    8.695304] [<c04e03ec>] (con_font_op) from [<c04d3694>]
(vt_ioctl+0x14a0/0x199c)
[    8.695312]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
r6:00000001 r5:ee808c00
[    8.695316]  r4:bee8a33c
[    8.695336] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
[    8.695345]  r10:00000000 r9:ed5aa000 r8:edfe9c00 r7:bee8a33c
r6:ededf400 r5:edfe9c00
[    8.695349]  r4:00004b72
[    8.695363] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
(do_vfs_ioctl+0xac/0xa2c)
[    8.695374]  r9:ed5aa000 r8:00000003 r7:c023f474 r6:ededf400
r5:ee90b3a8 r4:bee8a33c
[    8.695382] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
(SyS_ioctl+0x3c/0x64)
[    8.695390]  r10:00000000 r9:ed5aa000 r8:bee8a33c r7:00004b72
r6:ededf400 r5:00000003
[    8.695394]  r4:ededf400
[    8.695411] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[    8.695420]  r9:ed5aa000 r8:c0108da4 r7:00000036 r6:00000010
r5:00000008 r4:00027128
[    8.695425] ---[ end trace 3e19c988c4369e1e ]---
[    8.732040] ------------[ cut here ]------------
[    8.732072] WARNING: CPU: 1 PID: 469 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    8.732077] This function requires support for accurate vblank timestamps.
[    8.732083] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[    8.732168] CPU: 1 PID: 469 Comm: setfont Tainted: G        W
4.14.0-rc7-gd65d313-dirty #1
[    8.732175] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    8.732179] Backtrace:
[    8.732196] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    8.732206]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
[    8.732226] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    8.732246] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    8.732255]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    8.732260]  r4:ed0cd9f0 r3:00000000
[    8.732271] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    8.732280]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    8.732297] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    8.732302]  r3:00000000 r2:c0d50064
[    8.732306]  r4:edc2f000
[    8.732316] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    8.732323]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edc80680
[    8.732361] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    8.732367]  r5:ed1cdc00 r4:edc2b018
[    8.732392] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    8.732397]  r5:ed1cdc00 r4:00000018
[    8.732415] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    8.732426]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:ed1cdc00 r5:bf0ab088
[    8.732430]  r4:ed1cdc00
[    8.732454] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    8.732463]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    8.732467]  r4:ed1cdc00 r3:bf0a8174
[    8.732477] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    8.732482]  r5:00000000 r4:ed1cdc00
[    8.732497] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    8.732504]  r7:ed1cdc00 r6:edc2f000 r5:ed1cdc00 r4:00000000
[    8.732519] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    8.732526]  r7:ed1cdc00 r6:00000001 r5:0000003f r4:000000a0
[    8.732537] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[    8.732546]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[    8.732550]  r4:edf56e00
[    8.732568] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[    8.732578]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[    8.732583]  r4:edfe3400 r3:00000000
[    8.732600] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[    8.732615]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
r6:ee808c00 r5:edfe3400
[    8.732621]  r4:edf57800 r3:c049a648
[    8.732638] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[    8.732645]  r5:edfe3400 r4:ee808dc8
[    8.732663] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[    8.732674]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
r6:c17e5a70 r5:00000000
[    8.732678]  r4:ee808c00
[    8.732694] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
(fbcon_do_set_font+0x1e0/0x27c)
[    8.732703]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:ee39c010 r4:ee808c00
[    8.732715] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
(fbcon_set_font+0x208/0x224)
[    8.732726]  r10:c17e5bc8 r9:0000003e r8:ed0cddd8 r7:20135b36
r6:c17ebfb4 r5:00000000
[    8.732730]  r4:c17e5bc8
[    8.732744] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
(con_font_op+0x438/0x4f0)
[    8.732755]  r10:00000000 r9:008379c8 r8:00000000 r7:ee808c00
r6:00000001 r5:ee808c00
[    8.732759]  r4:ed0cde40
[    8.732777] [<c04e03ec>] (con_font_op) from [<c04d3694>]
(vt_ioctl+0x14a0/0x199c)
[    8.732788]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
r6:00000001 r5:ee808c00
[    8.732793]  r4:bed9434c
[    8.732810] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
[    8.732823]  r10:00000000 r9:ed0cc000 r8:edfe9c00 r7:bed9434c
r6:ed0dbcc0 r5:edfe9c00
[    8.732828]  r4:00004b72
[    8.732847] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
(do_vfs_ioctl+0xac/0xa2c)
[    8.732856]  r9:ed0cc000 r8:00000003 r7:c023f474 r6:ed0dbcc0
r5:ee90b3a8 r4:bed9434c
[    8.732867] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
(SyS_ioctl+0x3c/0x64)
[    8.732877]  r10:00000000 r9:ed0cc000 r8:bed9434c r7:00004b72
r6:ed0dbcc0 r5:00000003
[    8.732882]  r4:ed0dbcc0
[    8.732898] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[    8.732909]  r9:ed0cc000 r8:c0108da4 r7:00000036 r6:00000010
r5:00000008 r4:00027128
[    8.732914] ---[ end trace 3e19c988c4369e1f ]---
[    8.903802] ------------[ cut here ]------------
[    8.903857] WARNING: CPU: 2 PID: 483 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    8.903867] This function requires support for accurate vblank timestamps.
[    8.903878] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[    8.904099] CPU: 2 PID: 483 Comm: setfont Tainted: G        W
4.14.0-rc7-gd65d313-dirty #1
[    8.904110] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    8.904114] Backtrace:
[    8.904145] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    8.904165]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
[    8.904209] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    8.904238] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    8.904249]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    8.904255]  r4:ed0e39f0 r3:00000000
[    8.904266] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    8.904274]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    8.904287] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    8.904293]  r3:00000000 r2:c0d50064
[    8.904297]  r4:edc2f000
[    8.904307] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    8.904314]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edef7d00
[    8.904349] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    8.904354]  r5:ed787480 r4:edc2b018
[    8.904389] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    8.904407]  r5:ed787480 r4:00000018
[    8.904444] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    8.904466]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:ed787480 r5:bf0ab088
[    8.904474]  r4:ed787480
[    8.904502] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    8.904511]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    8.904516]  r4:ed787480 r3:bf0a8174
[    8.904529] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    8.904534]  r5:00000000 r4:ed787480
[    8.904552] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    8.904561]  r7:ed787480 r6:edc2f000 r5:ed787480 r4:00000000
[    8.904574] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    8.904581]  r7:ed787480 r6:00000001 r5:0000003f r4:000000a0
[    8.904594] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[    8.904603]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[    8.904607]  r4:edf56e00
[    8.904635] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[    8.904643]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[    8.904648]  r4:edfe3400 r3:00000000
[    8.904665] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[    8.904673]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
r6:ee808c00 r5:edfe3400
[    8.904678]  r4:edf57800 r3:c049a648
[    8.904690] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[    8.904695]  r5:edfe3400 r4:ee808dc8
[    8.904713] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[    8.904722]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
r6:c17e5a70 r5:00000000
[    8.904726]  r4:ee808c00
[    8.904737] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
(fbcon_do_set_font+0x1e0/0x27c)
[    8.904747]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:ee39c010 r4:ee808c00
[    8.904757] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
(fbcon_set_font+0x208/0x224)
[    8.904765]  r10:c17e5bc8 r9:0000003e r8:ed0e3dd8 r7:20135b36
r6:c17ebfb4 r5:00000000
[    8.904769]  r4:c17e5bc8
[    8.904782] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
(con_font_op+0x438/0x4f0)
[    8.904791]  r10:00000000 r9:00bdf9c8 r8:00000000 r7:ee808c00
r6:00000001 r5:ee808c00
[    8.904795]  r4:ed0e3e40
[    8.904817] [<c04e03ec>] (con_font_op) from [<c04d3694>]
(vt_ioctl+0x14a0/0x199c)
[    8.904825]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
r6:00000001 r5:ee808c00
[    8.904829]  r4:bef4633c
[    8.904851] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
[    8.904860]  r10:00000000 r9:ed0e2000 r8:edfe8c00 r7:bef4633c
r6:edebe000 r5:edfe8c00
[    8.904865]  r4:00004b72
[    8.904880] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
(do_vfs_ioctl+0xac/0xa2c)
[    8.904888]  r9:ed0e2000 r8:00000003 r7:c023f474 r6:edebe000
r5:eeb242f8 r4:bef4633c
[    8.904896] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
(SyS_ioctl+0x3c/0x64)
[    8.904905]  r10:00000000 r9:ed0e2000 r8:bef4633c r7:00004b72
r6:edebe000 r5:00000003
[    8.904909]  r4:edebe000
[    8.904925] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[    8.904933]  r9:ed0e2000 r8:c0108da4 r7:00000036 r6:00000010
r5:00000008 r4:00027128
[    8.904939] ---[ end trace 3e19c988c4369e20 ]---
[    8.961980] ------------[ cut here ]------------
[    8.962005] WARNING: CPU: 2 PID: 488 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    8.962010] This function requires support for accurate vblank timestamps.
[    8.962014] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[    8.962099] CPU: 2 PID: 488 Comm: setfont Tainted: G        W
4.14.0-rc7-gd65d313-dirty #1
[    8.962104] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    8.962107] Backtrace:
[    8.962126] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    8.962134]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
[    8.962153] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    8.962168] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    8.962177]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    8.962182]  r4:ed41f9f0 r3:00000000
[    8.962192] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    8.962200]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    8.962210] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    8.962215]  r3:00000000 r2:c0d50064
[    8.962220]  r4:edc2f000
[    8.962229] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    8.962236]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed787e80
[    8.962268] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    8.962274]  r5:ed4f9200 r4:edc2b018
[    8.962298] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    8.962304]  r5:ed4f9200 r4:00000018
[    8.962321] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    8.962330]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:ed4f9200 r5:bf0ab088
[    8.962334]  r4:ed4f9200
[    8.962353] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    8.962362]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    8.962367]  r4:ed4f9200 r3:bf0a8174
[    8.962376] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    8.962382]  r5:00000000 r4:ed4f9200
[    8.962397] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    8.962404]  r7:ed4f9200 r6:edc2f000 r5:ed4f9200 r4:00000000
[    8.962419] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    8.962426]  r7:ed4f9200 r6:00000001 r5:0000003f r4:000000a0
[    8.962436] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[    8.962444]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[    8.962448]  r4:edf56e00
[    8.962466] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[    8.962474]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[    8.962479]  r4:edfe3400 r3:00000000
[    8.962493] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[    8.962501]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
r6:ee808c00 r5:edfe3400
[    8.962506]  r4:edf57800 r3:c049a648
[    8.962516] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[    8.962521]  r5:edfe3400 r4:ee808dc8
[    8.962535] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[    8.962543]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
r6:c17e5a70 r5:00000000
[    8.962547]  r4:ee808c00
[    8.962557] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
(fbcon_do_set_font+0x1e0/0x27c)
[    8.962565]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:ee39c010 r4:ee808c00
[    8.962574] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
(fbcon_set_font+0x208/0x224)
[    8.962583]  r10:c17e5bc8 r9:0000003e r8:ed41fdd8 r7:20135b36
r6:c17ebfb4 r5:00000000
[    8.962587]  r4:c17e5bc8
[    8.962600] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
(con_font_op+0x438/0x4f0)
[    8.962608]  r10:00000000 r9:00b409c8 r8:00000000 r7:ee808c00
r6:00000001 r5:ee808c00
[    8.962612]  r4:ed41fe40
[    8.962632] [<c04e03ec>] (con_font_op) from [<c04d3694>]
(vt_ioctl+0x14a0/0x199c)
[    8.962641]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
r6:00000001 r5:ee808c00
[    8.962645]  r4:beb4f34c
[    8.962668] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
[    8.962677]  r10:00000000 r9:ed41e000 r8:edfe8c00 r7:beb4f34c
r6:ededa000 r5:edfe8c00
[    8.962681]  r4:00004b72
[    8.962697] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
(do_vfs_ioctl+0xac/0xa2c)
[    8.962705]  r9:ed41e000 r8:00000003 r7:c023f474 r6:ededa000
r5:eeb242f8 r4:beb4f34c
[    8.962714] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
(SyS_ioctl+0x3c/0x64)
[    8.962723]  r10:00000000 r9:ed41e000 r8:beb4f34c r7:00004b72
r6:ededa000 r5:00000003
[    8.962727]  r4:ededa000
[    8.962743] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[    8.962755]  r9:ed41e000 r8:c0108da4 r7:00000036 r6:00000010
r5:00000008 r4:00027128
[    8.962765] ---[ end trace 3e19c988c4369e21 ]---
[    8.966733] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[    8.967669] ------------[ cut here ]------------
[    8.967706] WARNING: CPU: 1 PID: 15 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[    8.967712] This function requires support for accurate vblank timestamps.
[    8.967716] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[    8.967804] CPU: 1 PID: 15 Comm: kworker/1:0 Tainted: G        W
   4.14.0-rc7-gd65d313-dirty #1
[    8.967809] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    8.967831] Workqueue: events output_poll_execute
[    8.967838] Backtrace:
[    8.967860] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[    8.967868]  r7:c106eed0 r6:00000000 r5:600d0193 r4:c106eed0
[    8.967891] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[    8.967909] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[    8.967919]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[    8.967924]  r4:ee8a7c00 r3:00000000
[    8.967934] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[    8.967943]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[    8.967954] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[    8.967960]  r3:00000000 r2:c0d50064
[    8.967964]  r4:edc2f000
[    8.967975] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[    8.967982]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed1cd900
[    8.968020] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[    8.968027]  r5:ed1cd080 r4:edc2b018
[    8.968051] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[    8.968057]  r5:ed1cd080 r4:00000018
[    8.968076] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[    8.968085]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:ed1cd080 r5:bf0ab088
[    8.968089]  r4:ed1cd080
[    8.968107] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[    8.968116]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[    8.968121]  r4:ed1cd080 r3:bf0a8174
[    8.968131] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[    8.968136]  r5:00000000 r4:ed1cd080
[    8.968151] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[    8.968159]  r7:ed1cd080 r6:edc2f000 r5:ed1cd080 r4:00000000
[    8.968172] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[    8.968179]  r7:ed1cd080 r6:00000001 r5:0000003f r4:000000a0
[    8.968192] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c0501724>] (restore_fbdev_mode+0x30/0x168)
[    8.968200]  r10:00000001 r9:00000000 r8:edc2f254 r7:edf56e00
r6:edf56ed0 r5:edf56ed0
[    8.968204]  r4:edf56e00
[    8.968219] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
[    8.968227]  r10:00000001 r9:00000000 r8:edc2f254 r7:00000001
r6:edf56ed0 r5:edf56ed0
[    8.968231]  r4:edf56e00
[    8.968246] [<c0504718>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c0504834>]
(drm_fb_helper_set_par+0x5c/0x8c)
[    8.968252]  r7:00000001 r6:edf56ed0 r5:00000000 r4:00000000
[    8.968263] [<c05047d8>] (drm_fb_helper_set_par) from [<c05046d0>]
(drm_fb_helper_hotplug_event.part.7+0xa4/0xbc)
[    8.968268]  r5:00000000 r4:edf56e00
[    8.968280] [<c050462c>] (drm_fb_helper_hotplug_event.part.7) from
[<c0504714>] (drm_fb_helper_hotplug_event+0x2c/0x30)
[    8.968286]  r7:00000001 r6:00000000 r5:edc2f000 r4:edc2f000
[    8.968297] [<c05046e8>] (drm_fb_helper_hotplug_event) from
[<c0504e34>] (drm_fbdev_cma_hotplug_event+0x18/0x1c)
[    8.968321] [<c0504e1c>] (drm_fbdev_cma_hotplug_event) from
[<bf0a82d0>] (imx_drm_output_poll_changed+0x18/0x1c [imxdrm])
[    8.968348] [<bf0a82b8>] (imx_drm_output_poll_changed [imxdrm])
from [<c04f3fbc>] (drm_kms_helper_hotplug_event+0x2c/0x30)
[    8.968360] [<c04f3f90>] (drm_kms_helper_hotplug_event) from
[<c04f41a0>] (output_poll_execute+0x190/0x1a4)
[    8.968366]  r5:edc2f000 r4:edc2f418
[    8.968381] [<c04f4010>] (output_poll_execute) from [<c013f1c4>]
(process_one_work+0x258/0x4f0)
[    8.968389]  r10:00000001 r9:00000000 r8:eefaed00 r7:ee8a7ef8
r6:eefabcc0 r5:ee83bb00
[    8.968393]  r4:edc2f418
[    8.968403] [<c013ef6c>] (process_one_work) from [<c01400e8>]
(worker_thread+0x58/0x59c)
[    8.968412]  r10:ee8a6000 r9:eefabcf4 r8:c1004900 r7:00000008
r6:ee83bb18 r5:eefabcc0
[    8.968416]  r4:ee83bb00
[    8.968427] [<c0140090>] (worker_thread) from [<c01462c0>]
(kthread+0x140/0x16c)
[    8.968435]  r10:ee85bd94 r9:ee83bc38 r8:ee83bb00 r7:ee8a6000
r6:ee840180 r5:00000000
[    8.968439]  r4:ee83bc00
[    8.968453] [<c0146180>] (kthread) from [<c0108c88>]
(ret_from_fork+0x14/0x2c)
[    8.968461]  r10:00000000 r9:00000000 r8:00000000 r7:00000000
r6:00000000 r5:c0146180
[    8.968465]  r4:ee840180
[    8.968471] ---[ end trace 3e19c988c4369e22 ]---
[   10.604619] Atheros 8035 ethernet 2188000.ethernet-1:01: attached
PHY driver [Atheros 8035 ethernet]
(mii_bus:phy_addr=2188000.ethernet-1:01, irq=POLL)
[   10.605926] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   14.077150] fec 2188000.ethernet eth0: Link is Up - 1Gbps/Full -
flow control rx/tx
[   14.078035] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   17.600543] ------------[ cut here ]------------
[   17.600578] WARNING: CPU: 2 PID: 782 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[   17.600582] This function requires support for accurate vblank timestamps.
[   17.600586] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[   17.600672] CPU: 2 PID: 782 Comm: Xorg.wrap Tainted: G        W
  4.14.0-rc7-gd65d313-dirty #1
[   17.600676] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   17.600680] Backtrace:
[   17.600697] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[   17.600705]  r7:c106eed0 r6:00000000 r5:600f0093 r4:c106eed0
[   17.600723] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[   17.600737] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[   17.600746]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[   17.600751]  r4:ed059c80 r3:00000000
[   17.600760] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[   17.600769]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[   17.600781] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[   17.600786]  r3:00000000 r2:c0d50064
[   17.600790]  r4:edc2f000
[   17.600800] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[   17.600807]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed042b00
[   17.600836] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[   17.600844]  r5:ed409300 r4:edc2b018
[   17.600867] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[   17.600874]  r5:ed409300 r4:00000018
[   17.600892] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[   17.600901]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:ed409300 r5:bf0ab088
[   17.600905]  r4:ed409300
[   17.600923] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[   17.600932]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[   17.600937]  r4:ed409300 r3:bf0a8174
[   17.600947] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[   17.600952]  r5:00000000 r4:ed409300
[   17.600968] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[   17.600975]  r7:ed409300 r6:edc2f000 r5:ed409300 r4:00000000
[   17.600987] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[   17.600993]  r7:ed409300 r6:00000001 r5:0000003f r4:000000a0
[   17.601004] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c0501724>] (restore_fbdev_mode+0x30/0x168)
[   17.601012]  r10:edf5ecec r9:edc2f214 r8:00000000 r7:edf56e00
r6:edf5ed00 r5:edf56ed0
[   17.601016]  r4:edf56e00
[   17.601029] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
[   17.601037]  r10:edf5ecec r9:edc2f214 r8:00000000 r7:edc2f0f0
r6:edf5ed00 r5:edf56ed0
[   17.601041]  r4:edf56e00
[   17.601053] [<c0504718>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c05047cc>]
(drm_fb_helper_restore_fbdev_mode_unlocked+0x38/0x44)
[   17.601060]  r7:edc2f0f0 r6:edf5ed00 r5:edc2f000 r4:edc2f000
[   17.601071] [<c0504794>]
(drm_fb_helper_restore_fbdev_mode_unlocked) from [<c0504e18>]
(drm_fbdev_cma_restore_mode+0x18/0x1c)
[   17.601091] [<c0504e00>] (drm_fbdev_cma_restore_mode) from
[<bf0a82ec>] (imx_drm_driver_lastclose+0x18/0x1c [imxdrm])
[   17.601108] [<bf0a82d4>] (imx_drm_driver_lastclose [imxdrm]) from
[<c0508ec0>] (drm_lastclose+0x40/0xd4)
[   17.601117] [<c0508e80>] (drm_lastclose) from [<c05091fc>]
(drm_release+0x2a8/0x364)
[   17.601123]  r5:edc2f000 r4:edf5ec00
[   17.601137] [<c0508f54>] (drm_release) from [<c022bf20>] (__fput+0x94/0x1e0)
[   17.601146]  r10:00000008 r9:ed759f28 r8:00000000 r7:edb5fc38
r6:ee8d9410 r5:ed759f28
[   17.601150]  r4:edee97c0
[   17.601158] [<c022be8c>] (__fput) from [<c022c0cc>] (____fput+0x10/0x14)
[   17.601167]  r10:00000000 r9:edee97c0 r8:c1087070 r7:edfc5dc4
r6:edfc5940 r5:edfc5d94
[   17.601171]  r4:00000000
[   17.601186] [<c022c0bc>] (____fput) from [<c0144754>]
(task_work_run+0x9c/0xc0)
[   17.601202] [<c01446b8>] (task_work_run) from [<c010cc70>]
(do_work_pending+0x94/0xbc)
[   17.601210]  r9:ed058000 r8:c0108da4 r7:ed059fb0 r6:c0108da4
r5:ed058000 r4:00000004
[   17.601220] [<c010cbdc>] (do_work_pending) from [<c0108c14>]
(slow_work_pending+0xc/0x20)
[   17.601227]  r7:00000006 r6:00000003 r5:be9c9cb4 r4:00000001
[   17.601231] ---[ end trace 3e19c988c4369e23 ]---
[   17.609550] ------------[ cut here ]------------
[   17.609591] WARNING: CPU: 3 PID: 783 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[   17.609599] This function requires support for accurate vblank timestamps.
[   17.609603] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[   17.609687] CPU: 3 PID: 783 Comm: (agetty) Tainted: G        W
 4.14.0-rc7-gd65d313-dirty #1
[   17.609692] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   17.609696] Backtrace:
[   17.609715] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[   17.609726]  r7:c106eed0 r6:00000000 r5:600b0093 r4:c106eed0
[   17.609744] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[   17.609760] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[   17.609769]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[   17.609774]  r4:ed5e99b8 r3:00000000
[   17.609784] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[   17.609793]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[   17.609804] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[   17.609811]  r3:00000000 r2:c0d50064
[   17.609815]  r4:edc2f000
[   17.609825] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[   17.609832]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed043980
[   17.609872] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[   17.609878]  r5:edc3f780 r4:edc2b018
[   17.609908] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[   17.609914]  r5:edc3f780 r4:00000018
[   17.609933] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[   17.609942]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:edc3f780 r5:bf0ab088
[   17.609947]  r4:edc3f780
[   17.609971] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[   17.609980]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[   17.609985]  r4:edc3f780 r3:bf0a8174
[   17.609996] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[   17.610002]  r5:00000000 r4:edc3f780
[   17.610020] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[   17.610029]  r7:edc3f780 r6:edc2f000 r5:edc3f780 r4:00000000
[   17.610043] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[   17.610050]  r7:edc3f780 r6:00000001 r5:0000003f r4:000000a0
[   17.610061] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[   17.610070]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[   17.610074]  r4:edf56e00
[   17.610104] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[   17.610116]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[   17.610121]  r4:edfe3400 r3:00000000
[   17.610137] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[   17.610146]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
r6:ee808c00 r5:edfe3400
[   17.610152]  r4:edf57800 r3:c049a648
[   17.610163] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[   17.610170]  r5:edfe3400 r4:ee808dc8
[   17.610188] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[   17.610200]  r10:0000000a r9:ee808c00 r8:00000000 r7:00000001
r6:ee808e34 r5:00000000
[   17.610205]  r4:ee808c00
[   17.610219] [<c04db4cc>] (redraw_screen) from [<c04db848>]
(csi_J+0x134/0x160)
[   17.610227]  r8:00000000 r7:c0bb934c r6:ee808e34 r5:ed4d4c00 r4:ee808c00
[   17.610240] [<c04db714>] (csi_J) from [<c04df7cc>]
(do_con_trol+0x14b8/0x1688)
[   17.610247]  r7:c0bb934c r6:ed4d4c00 r5:ed4d4c00 r4:ee808c00
[   17.610259] [<c04de314>] (do_con_trol) from [<c04dfba8>]
(do_con_write.part.9+0x20c/0x95c)
[   17.610268]  r10:0000000a r9:ee808c00 r8:00000000 r7:c0bb934c
r6:ed4d4c00 r5:ffffffff
[   17.610272]  r4:0000004a
[   17.610282] [<c04df99c>] (do_con_write.part.9) from [<c04e03dc>]
(con_write+0x80/0x90)
[   17.610291]  r10:00000000 r9:f27e529c r8:edef2b40 r7:c0bb934c
r6:ed4d4c00 r5:0000000a
[   17.610295]  r4:ffffe000
[   17.610320] [<c04e035c>] (con_write) from [<c04c7dc8>]
(n_tty_write+0x1c8/0x45c)
[   17.610327]  r7:c0bb934c r6:ed4d4000 r5:0000000a r4:ed4d4c00
[   17.610339] [<c04c7c00>] (n_tty_write) from [<c04c3e80>]
(tty_write+0x1f8/0x314)
[   17.610347]  r10:00000400 r9:ed5e8000 r8:00000000 r7:0000000a
r6:004dc55c r5:0000000a
[   17.610351]  r4:ed4d4c00
[   17.610374] [<c04c3c88>] (tty_write) from [<c022ade8>]
(__vfs_write+0x34/0x134)
[   17.610382]  r10:00000000 r9:0000000a r8:ed5e9f78 r7:ed5e9f78
r6:004dc55c r5:c04c3c88
[   17.610386]  r4:edef2b40
[   17.610396] [<c022adb4>] (__vfs_write) from [<c022b06c>]
(vfs_write+0xac/0x170)
[   17.610404]  r10:00000000 r9:0000000a r8:00000000 r7:ed5e9f78
r6:004dc55c r5:edef2b40
[   17.610408]  r4:0000000a
[   17.610418] [<c022afc0>] (vfs_write) from [<c022b248>] (SyS_write+0x44/0x98)
[   17.610429]  r9:0000000a r8:004dc55c r7:00000000 r6:00000000
r5:edef2b40 r4:edef2b40
[   17.610448] [<c022b204>] (SyS_write) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[   17.610460]  r9:ed5e8000 r8:c0108da4 r7:00000004 r6:00000003
r5:004dc55c r4:0000000a
[   17.610466] ---[ end trace 3e19c988c4369e24 ]---
[   17.768287] ------------[ cut here ]------------
[   17.768355] WARNING: CPU: 2 PID: 782 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[   17.768365] This function requires support for accurate vblank timestamps.
[   17.768373] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[   17.768564] CPU: 2 PID: 782 Comm: Xorg Tainted: G        W
4.14.0-rc7-gd65d313-dirty #1
[   17.768573] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   17.768581] Backtrace:
[   17.768608] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[   17.768621]  r7:c106eed0 r6:00000000 r5:60070093 r4:c106eed0
[   17.768646] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[   17.768668] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[   17.768683]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[   17.768693]  r4:ed059c80 r3:00000006
[   17.768709] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[   17.768724]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[   17.768742] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[   17.768752]  r3:00000000 r2:c0d50064
[   17.768761]  r4:edc2f000
[   17.768776] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[   17.768788]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed045800
[   17.768827] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[   17.768838]  r5:ed045200 r4:edc2b018
[   17.768869] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[   17.768880]  r5:ed045200 r4:00000018
[   17.768905] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[   17.768921]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:ed045200 r5:bf0ab088
[   17.768930]  r4:ed045200
[   17.768957] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[   17.768972]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[   17.768982]  r4:ed045200 r3:bf0a8174
[   17.768998] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[   17.769008]  r5:00000000 r4:ed045200
[   17.769030] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[   17.769042]  r7:ed045200 r6:edc2f000 r5:ed045200 r4:00000000
[   17.769061] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[   17.769074]  r7:ed045200 r6:00000001 r5:0000003f r4:000000a0
[   17.769091] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c0501724>] (restore_fbdev_mode+0x30/0x168)
[   17.769105]  r10:ed43baec r9:edc2f214 r8:00000000 r7:edf56e00
r6:ed43bb00 r5:edf56ed0
[   17.769113]  r4:edf56e00
[   17.769133] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
[   17.769147]  r10:ed43baec r9:edc2f214 r8:00000000 r7:edc2f0f0
r6:ed43bb00 r5:edf56ed0
[   17.769156]  r4:edf56e00
[   17.769174] [<c0504718>]
(drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c05047cc>]
(drm_fb_helper_restore_fbdev_mode_unlocked+0x38/0x44)
[   17.769186]  r7:edc2f0f0 r6:ed43bb00 r5:edc2f000 r4:edc2f000
[   17.769204] [<c0504794>]
(drm_fb_helper_restore_fbdev_mode_unlocked) from [<c0504e18>]
(drm_fbdev_cma_restore_mode+0x18/0x1c)
[   17.769234] [<c0504e00>] (drm_fbdev_cma_restore_mode) from
[<bf0a82ec>] (imx_drm_driver_lastclose+0x18/0x1c [imxdrm])
[   17.769261] [<bf0a82d4>] (imx_drm_driver_lastclose [imxdrm]) from
[<c0508ec0>] (drm_lastclose+0x40/0xd4)
[   17.769275] [<c0508e80>] (drm_lastclose) from [<c05091fc>]
(drm_release+0x2a8/0x364)
[   17.769286]  r5:edc2f000 r4:ed43ba00
[   17.769308] [<c0508f54>] (drm_release) from [<c022bf20>] (__fput+0x94/0x1e0)
[   17.769322]  r10:00000008 r9:ed759f28 r8:00000000 r7:edb5fc38
r6:ee8d9410 r5:ed759f28
[   17.769331]  r4:edee8280
[   17.769345] [<c022be8c>] (__fput) from [<c022c0cc>] (____fput+0x10/0x14)
[   17.769359]  r10:00000000 r9:edee8280 r8:c1087070 r7:edfc5dc4
r6:edfc5940 r5:edfc5d94
[   17.769368]  r4:00000000
[   17.769388] [<c022c0bc>] (____fput) from [<c0144754>]
(task_work_run+0x9c/0xc0)
[   17.769413] [<c01446b8>] (task_work_run) from [<c010cc70>]
(do_work_pending+0x94/0xbc)
[   17.769427]  r9:ed058000 r8:c0108da4 r7:ed059fb0 r6:c0108da4
r5:ed058000 r4:00000004
[   17.769444] [<c010cbdc>] (do_work_pending) from [<c0108c14>]
(slow_work_pending+0xc/0x20)
[   17.769457]  r7:00000006 r6:021d01e0 r5:00000000 r4:0000000a
[   17.769466] ---[ end trace 3e19c988c4369e25 ]---
[   17.848753] ------------[ cut here ]------------
[   17.848786] WARNING: CPU: 0 PID: 29 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[   17.848790] This function requires support for accurate vblank timestamps.
[   17.848795] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[   17.848879] CPU: 0 PID: 29 Comm: kworker/0:1 Tainted: G        W
   4.14.0-rc7-gd65d313-dirty #1
[   17.848884] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   17.848896] Workqueue: events console_callback
[   17.848904] Backtrace:
[   17.848919] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[   17.848928]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
[   17.848944] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[   17.848959] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[   17.848968]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[   17.848973]  r4:ee993b48 r3:00000000
[   17.848983] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[   17.848991]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[   17.849002] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[   17.849007]  r3:00000000 r2:c0d50064
[   17.849011]  r4:edc2f000
[   17.849021] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[   17.849028]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed1cca80
[   17.849070] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[   17.849086]  r5:ed1cc580 r4:edc2b018
[   17.849131] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[   17.849147]  r5:ed1cc580 r4:00000018
[   17.849174] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[   17.849193]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:ed1cc580 r5:bf0ab088
[   17.849207]  r4:ed1cc580
[   17.849249] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[   17.849271]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
r6:00000000 r5:bf0ab088
[   17.849283]  r4:ed1cc580 r3:bf0a8174
[   17.849296] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[   17.849301]  r5:00000000 r4:ed1cc580
[   17.849319] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[   17.849326]  r7:ed1cc580 r6:edc2f000 r5:ed1cc580 r4:00000000
[   17.849339] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
(restore_fbdev_mode_atomic+0x19c/0x1f8)
[   17.849346]  r7:ed1cc580 r6:00000001 r5:0000003f r4:000000a0
[   17.849369] [<c05014fc>] (restore_fbdev_mode_atomic) from
[<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
[   17.849389]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
r6:00000000 r5:edf56ed0
[   17.849404]  r4:edf56e00
[   17.849443] [<c05018f4>] (drm_fb_helper_pan_display) from
[<c048bc58>] (fb_pan_display+0xd4/0x140)
[   17.849456]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
r6:00000000 r5:edf5781c
[   17.849461]  r4:edfe3400 r3:00000000
[   17.849488] [<c048bb84>] (fb_pan_display) from [<c049a664>]
(bit_update_start+0x1c/0x38)
[   17.849500]  r10:00000000 r9:edf57800 r8:c17e5e80 r7:c17e5a70
r6:ed686000 r5:edfe3400
[   17.849506]  r4:edf57800 r3:c049a648
[   17.849517] [<c049a648>] (bit_update_start) from [<c049934c>]
(fbcon_switch+0x340/0x558)
[   17.849522]  r5:edfe3400 r4:ed6861c8
[   17.849534] [<c049900c>] (fbcon_switch) from [<c04db61c>]
(redraw_screen+0x150/0x248)
[   17.849543]  r10:00000001 r9:00000000 r8:ee808c00 r7:00000001
r6:c17ebe94 r5:00000001
[   17.849547]  r4:ed686000
[   17.849563] [<c04db4cc>] (redraw_screen) from [<c04d2158>]
(complete_change_console+0x44/0xe0)
[   17.849571]  r8:eef9ed00 r7:00000000 r6:eef9bcc0 r5:00000000 r4:ed686000
[   17.849599] [<c04d2114>] (complete_change_console) from
[<c04d3c44>] (change_console+0x74/0xa0)
[   17.849617]  r7:ee993ef8 r6:eef9bcc0 r5:ee808c00 r4:ed686000
[   17.849645] [<c04d3bd0>] (change_console) from [<c04de00c>]
(console_callback+0xf0/0x150)
[   17.849661]  r5:c102e7ac r4:c17ebe94
[   17.849689] [<c04ddf1c>] (console_callback) from [<c013f1c4>]
(process_one_work+0x258/0x4f0)
[   17.849697]  r5:ee842680 r4:c102e7f8
[   17.849707] [<c013ef6c>] (process_one_work) from [<c01400e8>]
(worker_thread+0x58/0x59c)
[   17.849730]  r10:ee992000 r9:eef9bcf4 r8:c1004900 r7:00000008
r6:ee842698 r5:eef9bcc0
[   17.849743]  r4:ee842680
[   17.849769] [<c0140090>] (worker_thread) from [<c01462c0>]
(kthread+0x140/0x16c)
[   17.849791]  r10:ee87de74 r9:ee855238 r8:ee842680 r7:ee992000
r6:ee963ec0 r5:00000000
[   17.849805]  r4:ee855200
[   17.849828] [<c0146180>] (kthread) from [<c0108c88>]
(ret_from_fork+0x14/0x2c)
[   17.849852]  r10:00000000 r9:00000000 r8:00000000 r7:00000000
r6:00000000 r5:c0146180
[   17.849864]  r4:ee963ec0
[   17.849877] ---[ end trace 3e19c988c4369e26 ]---
[   17.878902] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[   17.879975] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
120000.hdmi: failed to get edid
[   17.919734] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[   17.928202] dw_hdmi_setup:1679: dwhdmi-imx 120000.hdmi: Non-CEA
mode used in HDMI
[   17.928222] hdmi_av_composer:1495: dwhdmi-imx 120000.hdmi: final
pixclk = 65000000
[   17.928266] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[   17.939476] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[   17.939504] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
powered down in 0 iterations
[   17.950712] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
PLL locked 1 iterations
[   17.950743] dw_hdmi_setup:1744: dwhdmi-imx 120000.hdmi:
dw_hdmi_setup DVI mode
[   17.951224] ------------[ cut here ]------------
[   17.951269] WARNING: CPU: 0 PID: 782 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[   17.951277] This function requires support for accurate vblank timestamps.
[   17.951285] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[   17.951438] CPU: 0 PID: 782 Comm: Xorg Tainted: G        W
4.14.0-rc7-gd65d313-dirty #1
[   17.951445] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   17.951451] Backtrace:
[   17.951474] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[   17.951485]  r7:c106eed0 r6:00000000 r5:600e0093 r4:c106eed0
[   17.951505] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[   17.951523] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[   17.951535]  r10:000000ab r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[   17.951543]  r4:ed059c08 r3:00000006
[   17.951556] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[   17.951567]  r9:00000000 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[   17.951580] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[   17.951588]  r3:00000000 r2:c0d50064
[   17.951595]  r4:edc2f000
[   17.951608] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[   17.951618]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ee34b380
[   17.951649] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[   17.951658]  r5:ee34b480 r4:edc2b018
[   17.951685] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[   17.951693]  r5:ee34b480 r4:00000018
[   17.951713] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[   17.951726]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
r6:ee34b480 r5:bf0ab088
[   17.951733]  r4:ee34b480
[   17.951754] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[   17.951766]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
r6:00000000 r5:bf0ab088
[   17.951773]  r4:ee34b480 r3:bf0a8174
[   17.951786] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[   17.951794]  r5:00000000 r4:ee34b480
[   17.951810] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[   17.951820]  r7:00000000 r6:edc2f000 r5:ee34b480 r4:00000000
[   17.951836] [<c051c0e4>] (drm_atomic_commit) from [<c051d2fc>]
(drm_atomic_connector_commit_dpms+0xf0/0x100)
[   17.951846]  r7:00000000 r6:edc2c010 r5:ee34b480 r4:00000001
[   17.951859] [<c051d20c>] (drm_atomic_connector_commit_dpms) from
[<c0522a64>] (drm_mode_obj_set_property_ioctl+0x1b4/0x2ac)
[   17.951871]  r9:ee34b480 r8:00000000 r7:00000000 r6:ed059d78
r5:edc2c024 r4:edd76980
[   17.951884] [<c05228b0>] (drm_mode_obj_set_property_ioctl) from
[<c0521378>] (drm_mode_connector_property_set_ioctl+0x40/0x48)
[   17.951896]  r10:000000ab r9:c01064ab r8:ed059e60 r7:c0521338
r6:edc2f000 r5:00000000
[   17.951903]  r4:00000000
[   17.951919] [<c0521338>] (drm_mode_connector_property_set_ioctl)
from [<c050a7e0>] (drm_ioctl_kernel+0x70/0xb0)
[   17.951927]  r5:ed43b200 r4:0000001a
[   17.951939] [<c050a770>] (drm_ioctl_kernel) from [<c050ac78>]
(drm_ioctl+0x2a4/0x3ac)
[   17.951950]  r9:c01064ab r8:ed43b200 r7:ed059e60 r6:c0b45b9c
r5:00000010 r4:00000010
[   17.951964] [<c050a9d4>] (drm_ioctl) from [<c023eab8>]
(do_vfs_ioctl+0xac/0xa2c)
[   17.951975]  r10:00000000 r9:ed058000 r8:0000000b r7:c023f474
r6:edee9b80 r5:ed759f28
[   17.951982]  r4:bea337d0
[   17.951996] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
(SyS_ioctl+0x3c/0x64)
[   17.952007]  r10:00000000 r9:ed058000 r8:bea337d0 r7:c01064ab
r6:edee9b80 r5:0000000b
[   17.952014]  r4:edee9b80
[   17.952029] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[   17.952041]  r9:ed058000 r8:c0108da4 r7:00000036 r6:c01064ab
r5:bea337d0 r4:00000000
[   17.952048] ---[ end trace 3e19c988c4369e27 ]---
[   19.108300] ------------[ cut here ]------------
[   19.108329] WARNING: CPU: 2 PID: 782 at
drivers/gpu/drm/drm_vblank.c:303
drm_crtc_accurate_vblank_count+0x80/0x84
[   19.108337] This function requires support for accurate vblank timestamps.
[   19.108344] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
[   19.108497] CPU: 2 PID: 782 Comm: Xorg Tainted: G        W
4.14.0-rc7-gd65d313-dirty #1
[   19.108506] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   19.108513] Backtrace:
[   19.108533] [<c010d558>] (dump_backtrace) from [<c010d838>]
(show_stack+0x18/0x1c)
[   19.108544]  r7:c106eed0 r6:00000000 r5:60000093 r4:c106eed0
[   19.108562] [<c010d820>] (show_stack) from [<c09ff10c>]
(dump_stack+0xac/0xd8)
[   19.108579] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
[   19.108592]  r10:000000ab r9:c0527bd8 r8:0000012f r7:00000009
r6:c0d4fc08 r5:00000000
[   19.108600]  r4:ed059c08 r3:00000006
[   19.108612] [<c0122c8c>] (__warn) from [<c0122dd0>]
(warn_slowpath_fmt+0x40/0x48)
[   19.108624]  r9:00000000 r8:00000001 r7:edc2f000 r6:00000000
r5:edc2f000 r4:c0d50064
[   19.108638] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
(drm_crtc_accurate_vblank_count+0x80/0x84)
[   19.108646]  r3:00000000 r2:c0d50064
[   19.108653]  r4:edc2f000
[   19.108665] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
[<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
[   19.108675]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed042180
[   19.108709] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
[<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
[   19.108718]  r5:ed042c80 r4:edc2b018
[   19.108742] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
[<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
[   19.108751]  r5:ed042c80 r4:00000018
[   19.108771] [<c04fa694>] (drm_atomic_helper_commit_planes) from
[<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
[   19.108783]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
r6:ed042c80 r5:bf0ab088
[   19.108791]  r4:ed042c80
[   19.108814] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
[<c04feb1c>] (commit_tail+0x48/0x8c)
[   19.108826]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
r6:00000000 r5:bf0ab088
[   19.108834]  r4:ed042c80 r3:bf0a8174
[   19.108846] [<c04fead4>] (commit_tail) from [<c04fecb8>]
(drm_atomic_helper_commit+0x140/0x148)
[   19.108854]  r5:00000000 r4:ed042c80
[   19.108871] [<c04feb78>] (drm_atomic_helper_commit) from
[<c051c138>] (drm_atomic_commit+0x54/0x60)
[   19.108881]  r7:00000000 r6:edc2f000 r5:ed042c80 r4:00000000
[   19.108895] [<c051c0e4>] (drm_atomic_commit) from [<c051d2fc>]
(drm_atomic_connector_commit_dpms+0xf0/0x100)
[   19.108904]  r7:00000000 r6:edc2c010 r5:ed042c80 r4:00000001
[   19.108917] [<c051d20c>] (drm_atomic_connector_commit_dpms) from
[<c0522a64>] (drm_mode_obj_set_property_ioctl+0x1b4/0x2ac)
[   19.108928]  r9:ed042c80 r8:00000000 r7:00000000 r6:ed059d78
r5:edc2c024 r4:edd76980
[   19.108942] [<c05228b0>] (drm_mode_obj_set_property_ioctl) from
[<c0521378>] (drm_mode_connector_property_set_ioctl+0x40/0x48)
[   19.108954]  r10:000000ab r9:c01064ab r8:ed059e60 r7:c0521338
r6:edc2f000 r5:00000000
[   19.108961]  r4:00000000
[   19.108976] [<c0521338>] (drm_mode_connector_property_set_ioctl)
from [<c050a7e0>] (drm_ioctl_kernel+0x70/0xb0)
[   19.108985]  r5:ed43b200 r4:0000001a
[   19.108996] [<c050a770>] (drm_ioctl_kernel) from [<c050ac78>]
(drm_ioctl+0x2a4/0x3ac)
[   19.109007]  r9:c01064ab r8:ed43b200 r7:ed059e60 r6:c0b45b9c
r5:00000010 r4:00000010
[   19.109022] [<c050a9d4>] (drm_ioctl) from [<c023eab8>]
(do_vfs_ioctl+0xac/0xa2c)
[   19.109034]  r10:00000000 r9:ed058000 r8:0000000b r7:c023f474
r6:edee9b80 r5:ed759f28
[   19.109041]  r4:bea33bb0
[   19.109052] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
(SyS_ioctl+0x3c/0x64)
[   19.109063]  r10:00000000 r9:ed058000 r8:bea33bb0 r7:c01064ab
r6:edee9b80 r5:0000000b
[   19.109070]  r4:edee9b80
[   19.109085] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
(ret_fast_syscall+0x0/0x28)
[   19.109097]  r9:ed058000 r8:c0108da4 r7:00000036 r6:c01064ab
r5:bea33bb0 r4:00000000
[   19.109104] ---[ end trace 3e19c988c4369e28 ]---

On Thu, Nov 9, 2017 at 12:12 PM, Jani Nikula
<jani.nikula@linux.intel.com> wrote:
> On Thu, 09 Nov 2017, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
>> I've just applied the referred individual patch to kernel-4.14-rc5 and
>> the EDID isn't loaded. dw-hdmi gets no firmware at all.
>
> Sorry, I didn't mean you could just cherry-pick that one commit and make
> it work. There were a number of preparatory patches before that, and I
> think some cleanups on top.
>
> Please try drm-next to make sure you have it all.
>
> We didn't intend for the commits to be backported, instead we very much
> wanted them to get a gradually increasing amount of exposure first to
> make sure we don't break stuff.
>
> And as I said elsewhere in the thread, Russell's patch may be relevant
> for current Linus' master and stable. We just need to reconciliate how
> the two things should work together in drm-next and v4.15 and on.
>
> BR,
> Jani.
>
> --
> Jani Nikula, Intel Open Source Technology Center

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Jani Nikula]

On Thu, 09 Nov 2017, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
> Hi Jani,
>
> I tried:
> git clone git://people.freedesktop.org/~airlied/linux -b drm-next
> --depth=1 --single-branch
>
> I got this:
> EDID isn't loaded from file
>
> # cat /proc/cmdline
> console=ttymxc0,115200 root=/dev/sda2 rw video=HDMI-A-1:1920x1080M at 60
> drm.edid_firmware=edid/ktc_edid.bin dw_hdmi.dyndbg=+pfl cma=128M

Please try adding D at the end of your video= parameter to force
connector on. Otherwise it'll do a ddc probe which apparently fails with
your display.

BR,
Jani.

>
> #zcat /proc/config.gz  | grep EDID
> CONFIG_DRM_LOAD_EDID_FIRMWARE=y
> # CONFIG_FIRMWARE_EDID is not set
>
> #cat /sys/class/drm/card1-HDMI-A-1/edid
> <empty>
>
> dmesg output follows below...
>
> Regards,
> Lu?s Mendes
>
> [    7.381500] dwhdmi-imx 120000.hdmi: Detected HDMI TX controller
> v1.30a with HDCP (DWC HDMI 3D TX PHY)
> [    7.409108] hdmi_set_clk_regenerator:521: dwhdmi-imx 120000.hdmi:
> hdmi_set_clk_regenerator: fs=48000Hz ftdms=74.250MHz N=6144 cts=74250
> [    7.411001] dw_hdmi_irq:2146: dwhdmi-imx 120000.hdmi: EVENT=plugin
> [    7.421524] imx-drm display-subsystem: bound 120000.hdmi (ops
> dw_hdmi_imx_ops [dw_hdmi_imx])
> [    7.481948] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
> 120000.hdmi: failed to get edid
> [    7.537018] fsl-asoc-card sound: sgtl5000 <-> 2028000.ssi mapping ok
> [    7.549254] ------------[ cut here ]------------
> [    7.549303] WARNING: CPU: 2 PID: 219 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    7.549308] This function requires support for accurate vblank timestamps.
> [    7.549312] Modules linked in: snd_soc_imx_spdif(+)
> snd_soc_fsl_asoc_card(+) snd_ac97_codec coda videobuf2_dma_contig
> imx_vdoa v4l2_mem2mem videobuf2_vmalloc videobuf2_memops dw_hdmi_imx
> imxdrm(+) dw_hdmi cec etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev
> lp parport
> [    7.549396] CPU: 2 PID: 219 Comm: systemd-udevd Tainted: G        W
>       4.14.0-rc7-gd65d313-dirty #1
> [    7.549401] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    7.549405] Backtrace:
> [    7.549427] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    7.549436]  r7:c106eed0 r6:00000000 r5:600d0193 r4:c106eed0
> [    7.549465] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    7.549486] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    7.549496]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    7.549501]  r4:edd15688 r3:00000000
> [    7.549514] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    7.549523]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    7.549535] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    7.549540]  r3:00000000 r2:c0d50064
> [    7.549544]  r4:edc2f000
> [    7.549553] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    7.549560]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:eeb3e400
> [    7.549614] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    7.549620]  r5:eeb3e680 r4:edc2b018
> [    7.549653] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    7.549660]  r5:eeb3e680 r4:00000018
> [    7.549682] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    7.549691]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:eeb3e680 r5:bf0ab088
> [    7.549695]  r4:eeb3e680
> [    7.549723] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    7.549732]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    7.549737]  r4:eeb3e680 r3:bf0a8174
> [    7.549762] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    7.549780]  r5:00000000 r4:eeb3e680
> [    7.549820] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    7.549843]  r7:eeb3e680 r6:edc2f000 r5:eeb3e680 r4:00000000
> [    7.549865] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    7.549874]  r7:eeb3e680 r6:00000001 r5:0000003f r4:000000a0
> [    7.549886] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c0501724>] (restore_fbdev_mode+0x30/0x168)
> [    7.549895]  r10:edf57800 r9:c17e5a70 r8:00000000 r7:edf56e00
> r6:c17e5bc8 r5:edf56ed0
> [    7.549899]  r4:edf56e00
> [    7.549914] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
> [    7.549925]  r10:edf57800 r9:c17e5a70 r8:00000000 r7:c1022ed8
> r6:c17e5bc8 r5:edf56ed0
> [    7.549931]  r4:edf56e00
> [    7.549943] [<c0504718>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c0504834>]
> (drm_fb_helper_set_par+0x5c/0x8c)
> [    7.549950]  r7:c1022ed8 r6:c17e5bc8 r5:edfe3400 r4:00000000
> [    7.549972] [<c05047d8>] (drm_fb_helper_set_par) from [<c0496768>]
> (fbcon_init+0x564/0x5b0)
> [    7.549977]  r5:edfe3400 r4:ee808c00
> [    7.549992] [<c0496204>] (fbcon_init) from [<c04daae8>]
> (visual_init+0xcc/0x114)
> [    7.550001]  r10:00000001 r9:ee808c00 r8:c17ebfb4 r7:00000000
> r6:ee808e08 r5:00000000
> [    7.550005]  r4:ee808c00
> [    7.550016] [<c04daa1c>] (visual_init) from [<c04dc12c>]
> (do_bind_con_driver+0x1b4/0x394)
> [    7.550023]  r7:00000000 r6:00000000 r5:c17ebea0 r4:c0b3e0dc
> [    7.550033] [<c04dbf78>] (do_bind_con_driver) from [<c04dc700>]
> (do_take_over_console+0x15c/0x1c4)
> [    7.550041]  r10:00000001 r9:0000003e r8:00000000 r7:c17ebeb0
> r6:00000000 r5:00000000
> [    7.550045]  r4:00000000
> [    7.550057] [<c04dc5a4>] (do_take_over_console) from [<c0496830>]
> (do_fbcon_takeover+0x7c/0xd4)
> [    7.550065]  r10:edfe3694 r9:edfe3400 r8:00000000 r7:00000000
> r6:00000005 r5:c17e5a70
> [    7.550069]  r4:c1022ed8
> [    7.550080] [<c04967b4>] (do_fbcon_takeover) from [<c049a2d0>]
> (fbcon_event_notify+0x8c8/0x908)
> [    7.550086]  r5:c1022ed8 r4:c17e5a70
> [    7.550105] [<c0499a08>] (fbcon_event_notify) from [<c0147b5c>]
> (notifier_call_chain+0x4c/0x8c)
> [    7.550114]  r10:edfe3694 r9:edfe340c r8:00000000 r7:00000000
> r6:00000005 r5:edd15ab0
> [    7.550118]  r4:ffffffff
> [    7.550129] [<c0147b10>] (notifier_call_chain) from [<c0147fec>]
> (__blocking_notifier_call_chain+0x50/0x68)
> [    7.550138]  r9:edfe340c r8:c17e5a38 r7:ffffffff r6:edd15ab0
> r5:c1022cfc r4:00000005
> [    7.550150] [<c0147f9c>] (__blocking_notifier_call_chain) from
> [<c0148024>] (blocking_notifier_call_chain+0x20/0x28)
> [    7.550156]  r7:00000000 r6:c1007f10 r5:edfe3400 r4:c1007f10
> [    7.550178] [<c0148004>] (blocking_notifier_call_chain) from
> [<c048b8fc>] (fb_notifier_call_chain+0x20/0x24)
> [    7.550188] [<c048b8dc>] (fb_notifier_call_chain) from [<c048d8a0>]
> (register_framebuffer+0x1f8/0x2ac)
> [    7.550206] [<c048d6a8>] (register_framebuffer) from [<c05043f4>]
> (__drm_fb_helper_initial_config_and_unlock+0x220/0x414)
> [    7.550214]  r10:bf0a855c r9:00000000 r8:00000000 r7:c1031728
> r6:edc2f000 r5:edfe3400
> [    7.550218]  r4:edf56e00
> [    7.550230] [<c05041d4>]
> (__drm_fb_helper_initial_config_and_unlock) from [<c0504628>]
> (drm_fb_helper_initial_config+0x40/0x44)
> [    7.550238]  r10:bf0a855c r9:c1031d28 r8:00000010 r7:c0b450e0
> r6:edc2f000 r5:00000010
> [    7.550242]  r4:edf56e00
> [    7.550253] [<c05045e8>] (drm_fb_helper_initial_config) from
> [<c0504a9c>] (drm_fbdev_cma_init_with_funcs+0x88/0x100)
> [    7.550258]  r5:00000000 r4:edf56e00
> [    7.550269] [<c0504a14>] (drm_fbdev_cma_init_with_funcs) from
> [<c0504b28>] (drm_fbdev_cma_init+0x14/0x1c)
> [    7.550277]  r9:c1031d28 r8:00000000 r7:ed638c90 r6:eea12010
> r5:bf0ac000 r4:edc2f000
> [    7.550314] [<c0504b14>] (drm_fbdev_cma_init) from [<bf0a83e4>]
> (imx_drm_bind+0xf4/0x178 [imxdrm])
> [    7.550346] [<bf0a82f0>] (imx_drm_bind [imxdrm]) from [<c0532e7c>]
> (try_to_bring_up_master+0x25c/0x2dc)
> [    7.550355]  r9:c1031d28 r8:ed638450 r7:ed638940 r6:00000008
> r5:000000a0 r4:ed4d9580
> [    7.550367] [<c0532c20>] (try_to_bring_up_master) from [<c0532fac>]
> (component_add+0xb0/0x178)
> [    7.550375]  r10:00000000 r9:bf0ac160 r8:00000000 r7:ed638ac0
> r6:c1031d20 r5:00000000
> [    7.550380]  r4:ed638940
> [    7.550412] [<c0532efc>] (component_add) from [<bf0a8f2c>]
> (ipu_drm_probe+0x80/0xa4 [imxdrm])
> [    7.550439]  r9:bf0ac160 r8:00000000 r7:fffffdfb r6:bf0ac160
> r5:eddcfc10 r4:eddcfde0
> [    7.550499] [<bf0a8eac>] (ipu_drm_probe [imxdrm]) from [<c053b140>]
> (platform_drv_probe+0x58/0xb8)
> [    7.550508]  r5:ffffffed r4:eddcfc10
> [    7.550522] [<c053b0e8>] (platform_drv_probe) from [<c053926c>]
> (driver_probe_device+0x2d0/0x47c)
> [    7.550529]  r7:c17ee208 r6:c1075608 r5:c17ee204 r4:eddcfc10
> [    7.550542] [<c0538f9c>] (driver_probe_device) from [<c0539524>]
> (__driver_attach+0x10c/0x128)
> [    7.550551]  r10:bf0ac280 r9:c053b0e8 r8:00000000 r7:c1075530
> r6:bf0ac160 r5:eddcfc44
> [    7.550555]  r4:eddcfc10
> [    7.550564] [<c0539418>] (__driver_attach) from [<c0537160>]
> (bus_for_each_dev+0x70/0xa4)
> [    7.550572]  r7:c1075530 r6:c0539418 r5:bf0ac160 r4:00000000
> [    7.550582] [<c05370f0>] (bus_for_each_dev) from [<c0538a58>]
> (driver_attach+0x24/0x28)
> [    7.550588]  r6:c1032490 r5:edd76c00 r4:bf0ac160
> [    7.550598] [<c0538a34>] (driver_attach) from [<c0538438>]
> (bus_add_driver+0x1ac/0x26c)
> [    7.550611] [<c053828c>] (bus_add_driver) from [<c0539f80>]
> (driver_register+0x80/0xfc)
> [    7.550618]  r8:c053b0a4 r7:c053aa50 r6:c1075830 r5:00000001 r4:bf0ac160
> [    7.550629] [<c0539f00>] (driver_register) from [<c053b2ac>]
> (__platform_register_drivers+0x80/0x164)
> [    7.550634]  r5:00000001 r4:bf0ab090
> [    7.550664] [<c053b22c>] (__platform_register_drivers) from
> [<bf0b0020>] (imx_drm_init+0x20/0x1000 [imxdrm])
> [    7.550672]  r10:edd15f40 r9:edeb9070 r8:bf0ac2c8 r7:edeb9980
> r6:00000000 r5:bf0b0000
> [    7.550676]  r4:ffffe000
> [    7.550701] [<bf0b0000>] (imx_drm_init [imxdrm]) from [<c0101ba4>]
> (do_one_initcall+0x4c/0x174)
> [    7.550717] [<c0101b58>] (do_one_initcall) from [<c01b0880>]
> (do_init_module+0x68/0x1fc)
> [    7.550725]  r9:edeb9070 r8:bf0ac2c8 r6:bf0ac280 r5:00000001 r4:bf0ac280
> [    7.550735] [<c01b0818>] (do_init_module) from [<c01af89c>]
> (load_module+0x2064/0x270c)
> [    7.550741]  r7:edeb9040 r6:bf0ac280 r5:00000001 r4:00000001
> [    7.550750] [<c01ad838>] (load_module) from [<c01b01c4>]
> (SyS_finit_module+0xbc/0xf8)
> [    7.550759]  r10:00000000 r9:edd14000 r8:c0108da4 r7:0000017b
> r6:b6e24d40 r5:0000000f
> [    7.550764]  r4:00000000
> [    7.550776] [<c01b0108>] (SyS_finit_module) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [    7.550781]  r6:00000000 r5:bebb39f4 r4:7778f500
> [    7.550790] ---[ end trace 3e19c988c4369e1b ]---
> [    7.590815] imx-spdif sound-spdif: snd-soc-dummy-dai <->
> 2004000.spdif mapping ok
> [    7.616586] dw_hdmi_setup:1679: dwhdmi-imx 120000.hdmi: Non-CEA
> mode used in HDMI
> [    7.616616] hdmi_av_composer:1495: dwhdmi-imx 120000.hdmi: final
> pixclk = 173106000
> [    7.616670] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
> powered down in 0 iterations
> [    7.678961] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
> PLL locked 1 iterations
> [    7.678991] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
> powered down in 0 iterations
> [    7.733710] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
> PLL locked 1 iterations
> [    7.733749] dw_hdmi_setup:1744: dwhdmi-imx 120000.hdmi:
> dw_hdmi_setup DVI mode
> [    7.734455] ------------[ cut here ]------------
> [    7.734483] WARNING: CPU: 2 PID: 219 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    7.734491] This function requires support for accurate vblank timestamps.
> [    7.734495] Modules linked in: snd_soc_imx_sgtl5000
> snd_soc_imx_spdif snd_soc_fsl_asoc_card snd_ac97_codec coda
> videobuf2_dma_contig imx_vdoa v4l2_mem2mem videobuf2_vmalloc
> videobuf2_memops dw_hdmi_imx imxdrm(+) dw_hdmi cec etnaviv imx_ipu_v3
> binfmt_misc parport_pc ppdev lp parport
> [    7.734575] CPU: 2 PID: 219 Comm: systemd-udevd Tainted: G        W
>       4.14.0-rc7-gd65d313-dirty #1
> [    7.734580] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    7.734584] Backtrace:
> [    7.734601] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    7.734609]  r7:c106eed0 r6:00000000 r5:600f0093 r4:c106eed0
> [    7.734627] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    7.734643] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    7.734652]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    7.734657]  r4:edd15520 r3:00000000
> [    7.734667] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    7.734675]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    7.734686] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    7.734691]  r3:00000000 r2:c0d50064
> [    7.734695]  r4:edc2f000
> [    7.734705] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    7.734711]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edeb5b00
> [    7.734751] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    7.734757]  r5:edeb5700 r4:edc2b018
> [    7.734785] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    7.734791]  r5:edeb5700 r4:00000018
> [    7.734811] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    7.734821]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:edeb5700 r5:bf0ab088
> [    7.734825]  r4:edeb5700
> [    7.734848] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    7.734857]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    7.734862]  r4:edeb5700 r3:bf0a8174
> [    7.734872] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    7.734878]  r5:00000000 r4:edeb5700
> [    7.734895] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    7.734902]  r7:edeb5700 r6:edc2f000 r5:edeb5700 r4:00000000
> [    7.734916] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    7.734922]  r7:edeb5700 r6:00000001 r5:0000003f r4:000000a0
> [    7.734933] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [    7.734942]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [    7.734946]  r4:edf56e00
> [    7.734966] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [    7.734974]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [    7.734979]  r4:edfe3400 r3:00000000
> [    7.734993] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [    7.735002]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
> r6:ee808c00 r5:edfe3400
> [    7.735007]  r4:edf57800 r3:c049a648
> [    7.735017] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [    7.735022]  r5:edfe3400 r4:ee808dc8
> [    7.735034] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [    7.735043]  r10:00000000 r9:00000000 r8:fffffe20 r7:00000001
> r6:00000000 r5:00000000
> [    7.735047]  r4:ee808c00
> [    7.735056] [<c04db4cc>] (redraw_screen) from [<c0496174>]
> (fbcon_prepare_logo+0x354/0x3e4)
> [    7.735064]  r8:fffffe20 r7:00000043 r6:00000000 r5:00000000 r4:ee808c00
> [    7.735076] [<c0495e20>] (fbcon_prepare_logo) from [<c04965d4>]
> (fbcon_init+0x3d0/0x5b0)
> [    7.735084]  r10:edf57800 r9:c17e5a70 r8:c17e5bc8 r7:c1022ed8
> r6:c17e5bc8 r5:edfe3400
> [    7.735088]  r4:ee808c00
> [    7.735097] [<c0496204>] (fbcon_init) from [<c04daae8>]
> (visual_init+0xcc/0x114)
> [    7.735105]  r10:00000001 r9:ee808c00 r8:c17ebfb4 r7:00000000
> r6:ee808e08 r5:00000000
> [    7.735109]  r4:ee808c00
> [    7.735118] [<c04daa1c>] (visual_init) from [<c04dc12c>]
> (do_bind_con_driver+0x1b4/0x394)
> [    7.735125]  r7:00000000 r6:00000000 r5:c17ebea0 r4:c0b3e0dc
> [    7.735135] [<c04dbf78>] (do_bind_con_driver) from [<c04dc700>]
> (do_take_over_console+0x15c/0x1c4)
> [    7.735143]  r10:00000001 r9:0000003e r8:00000000 r7:c17ebeb0
> r6:00000000 r5:00000000
> [    7.735147]  r4:00000000
> [    7.735156] [<c04dc5a4>] (do_take_over_console) from [<c0496830>]
> (do_fbcon_takeover+0x7c/0xd4)
> [    7.735164]  r10:edfe3694 r9:edfe3400 r8:00000000 r7:00000000
> r6:00000005 r5:c17e5a70
> [    7.735168]  r4:c1022ed8
> [    7.735178] [<c04967b4>] (do_fbcon_takeover) from [<c049a2d0>]
> (fbcon_event_notify+0x8c8/0x908)
> [    7.735183]  r5:c1022ed8 r4:c17e5a70
> [    7.735200] [<c0499a08>] (fbcon_event_notify) from [<c0147b5c>]
> (notifier_call_chain+0x4c/0x8c)
> [    7.735208]  r10:edfe3694 r9:edfe340c r8:00000000 r7:00000000
> r6:00000005 r5:edd15ab0
> [    7.735212]  r4:ffffffff
> [    7.735223] [<c0147b10>] (notifier_call_chain) from [<c0147fec>]
> (__blocking_notifier_call_chain+0x50/0x68)
> [    7.735232]  r9:edfe340c r8:c17e5a38 r7:ffffffff r6:edd15ab0
> r5:c1022cfc r4:00000005
> [    7.735242] [<c0147f9c>] (__blocking_notifier_call_chain) from
> [<c0148024>] (blocking_notifier_call_chain+0x20/0x28)
> [    7.735248]  r7:00000000 r6:c1007f10 r5:edfe3400 r4:c1007f10
> [    7.735260] [<c0148004>] (blocking_notifier_call_chain) from
> [<c048b8fc>] (fb_notifier_call_chain+0x20/0x24)
> [    7.735272] [<c048b8dc>] (fb_notifier_call_chain) from [<c048d8a0>]
> (register_framebuffer+0x1f8/0x2ac)
> [    7.735289] [<c048d6a8>] (register_framebuffer) from [<c05043f4>]
> (__drm_fb_helper_initial_config_and_unlock+0x220/0x414)
> [    7.735297]  r10:bf0a855c r9:00000000 r8:00000000 r7:c1031728
> r6:edc2f000 r5:edfe3400
> [    7.735301]  r4:edf56e00
> [    7.735315] [<c05041d4>]
> (__drm_fb_helper_initial_config_and_unlock) from [<c0504628>]
> (drm_fb_helper_initial_config+0x40/0x44)
> [    7.735323]  r10:bf0a855c r9:c1031d28 r8:00000010 r7:c0b450e0
> r6:edc2f000 r5:00000010
> [    7.735327]  r4:edf56e00
> [    7.735339] [<c05045e8>] (drm_fb_helper_initial_config) from
> [<c0504a9c>] (drm_fbdev_cma_init_with_funcs+0x88/0x100)
> [    7.735345]  r5:00000000 r4:edf56e00
> [    7.735356] [<c0504a14>] (drm_fbdev_cma_init_with_funcs) from
> [<c0504b28>] (drm_fbdev_cma_init+0x14/0x1c)
> [    7.735364]  r9:c1031d28 r8:00000000 r7:ed638c90 r6:eea12010
> r5:bf0ac000 r4:edc2f000
> [    7.735394] [<c0504b14>] (drm_fbdev_cma_init) from [<bf0a83e4>]
> (imx_drm_bind+0xf4/0x178 [imxdrm])
> [    7.735422] [<bf0a82f0>] (imx_drm_bind [imxdrm]) from [<c0532e7c>]
> (try_to_bring_up_master+0x25c/0x2dc)
> [    7.735431]  r9:c1031d28 r8:ed638450 r7:ed638940 r6:00000008
> r5:000000a0 r4:ed4d9580
> [    7.735441] [<c0532c20>] (try_to_bring_up_master) from [<c0532fac>]
> (component_add+0xb0/0x178)
> [    7.735449]  r10:00000000 r9:bf0ac160 r8:00000000 r7:ed638ac0
> r6:c1031d20 r5:00000000
> [    7.735453]  r4:ed638940
> [    7.735473] [<c0532efc>] (component_add) from [<bf0a8f2c>]
> (ipu_drm_probe+0x80/0xa4 [imxdrm])
> [    7.735482]  r9:bf0ac160 r8:00000000 r7:fffffdfb r6:bf0ac160
> r5:eddcfc10 r4:eddcfde0
> [    7.735510] [<bf0a8eac>] (ipu_drm_probe [imxdrm]) from [<c053b140>]
> (platform_drv_probe+0x58/0xb8)
> [    7.735516]  r5:ffffffed r4:eddcfc10
> [    7.735530] [<c053b0e8>] (platform_drv_probe) from [<c053926c>]
> (driver_probe_device+0x2d0/0x47c)
> [    7.735537]  r7:c17ee208 r6:c1075608 r5:c17ee204 r4:eddcfc10
> [    7.735548] [<c0538f9c>] (driver_probe_device) from [<c0539524>]
> (__driver_attach+0x10c/0x128)
> [    7.735556]  r10:bf0ac280 r9:c053b0e8 r8:00000000 r7:c1075530
> r6:bf0ac160 r5:eddcfc44
> [    7.735560]  r4:eddcfc10
> [    7.735570] [<c0539418>] (__driver_attach) from [<c0537160>]
> (bus_for_each_dev+0x70/0xa4)
> [    7.735577]  r7:c1075530 r6:c0539418 r5:bf0ac160 r4:00000000
> [    7.735586] [<c05370f0>] (bus_for_each_dev) from [<c0538a58>]
> (driver_attach+0x24/0x28)
> [    7.735594]  r6:c1032490 r5:edd76c00 r4:bf0ac160
> [    7.735604] [<c0538a34>] (driver_attach) from [<c0538438>]
> (bus_add_driver+0x1ac/0x26c)
> [    7.735614] [<c053828c>] (bus_add_driver) from [<c0539f80>]
> (driver_register+0x80/0xfc)
> [    7.735621]  r8:c053b0a4 r7:c053aa50 r6:c1075830 r5:00000001 r4:bf0ac160
> [    7.735632] [<c0539f00>] (driver_register) from [<c053b2ac>]
> (__platform_register_drivers+0x80/0x164)
> [    7.735637]  r5:00000001 r4:bf0ab090
> [    7.735663] [<c053b22c>] (__platform_register_drivers) from
> [<bf0b0020>] (imx_drm_init+0x20/0x1000 [imxdrm])
> [    7.735671]  r10:edd15f40 r9:edeb9070 r8:bf0ac2c8 r7:edeb9980
> r6:00000000 r5:bf0b0000
> [    7.735675]  r4:ffffe000
> [    7.735698] [<bf0b0000>] (imx_drm_init [imxdrm]) from [<c0101ba4>]
> (do_one_initcall+0x4c/0x174)
> [    7.735715] [<c0101b58>] (do_one_initcall) from [<c01b0880>]
> (do_init_module+0x68/0x1fc)
> [    7.735723]  r9:edeb9070 r8:bf0ac2c8 r6:bf0ac280 r5:00000001 r4:bf0ac280
> [    7.735732] [<c01b0818>] (do_init_module) from [<c01af89c>]
> (load_module+0x2064/0x270c)
> [    7.735739]  r7:edeb9040 r6:bf0ac280 r5:00000001 r4:00000001
> [    7.735748] [<c01ad838>] (load_module) from [<c01b01c4>]
> (SyS_finit_module+0xbc/0xf8)
> [    7.735757]  r10:00000000 r9:edd14000 r8:c0108da4 r7:0000017b
> r6:b6e24d40 r5:0000000f
> [    7.735761]  r4:00000000
> [    7.735776] [<c01b0108>] (SyS_finit_module) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [    7.735782]  r6:00000000 r5:bebb39f4 r4:7778f500
> [    7.735788] ---[ end trace 3e19c988c4369e1c ]---
> [    7.748484] Console: switching to colour frame buffer device 240x67
> [    7.799927] ------------[ cut here ]------------
> [    7.799956] WARNING: CPU: 2 PID: 219 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    7.799962] This function requires support for accurate vblank timestamps.
> [    7.799966] Modules linked in: snd_soc_imx_sgtl5000
> snd_soc_imx_spdif snd_soc_fsl_asoc_card snd_ac97_codec coda
> videobuf2_dma_contig imx_vdoa v4l2_mem2mem videobuf2_vmalloc
> videobuf2_memops dw_hdmi_imx imxdrm(+) dw_hdmi cec etnaviv imx_ipu_v3
> binfmt_misc parport_pc ppdev lp parport
> [    7.800052] CPU: 2 PID: 219 Comm: systemd-udevd Tainted: G        W
>       4.14.0-rc7-gd65d313-dirty #1
> [    7.800057] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    7.800061] Backtrace:
> [    7.800081] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    7.800090]  r7:c106eed0 r6:00000000 r5:600f0093 r4:c106eed0
> [    7.800115] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    7.800134] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    7.800143]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    7.800148]  r4:edd155f0 r3:00000000
> [    7.800158] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    7.800166]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    7.800177] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    7.800182]  r3:00000000 r2:c0d50064
> [    7.800186]  r4:edc2f000
> [    7.800196] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    7.800203]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edd94900
> [    7.800249] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    7.800257]  r5:edeb6480 r4:edc2b018
> [    7.800304] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    7.800323]  r5:edeb6480 r4:00000018
> [    7.800360] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    7.800374]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:edeb6480 r5:bf0ab088
> [    7.800386]  r4:edeb6480
> [    7.800424] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    7.800446]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    7.800459]  r4:edeb6480 r3:bf0a8174
> [    7.800471] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    7.800477]  r5:00000000 r4:edeb6480
> [    7.800497] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    7.800513]  r7:edeb6480 r6:edc2f000 r5:edeb6480 r4:00000000
> [    7.800541] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    7.800559]  r7:edeb6480 r6:00000001 r5:0000003f r4:000000a0
> [    7.800579] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [    7.800601]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [    7.800617]  r4:edf56e00
> [    7.800661] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [    7.800688]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [    7.800700]  r4:edfe3400 r3:00000000
> [    7.800727] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [    7.800746]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
> r6:ee808c00 r5:edfe3400
> [    7.800763]  r4:edf57800 r3:c049a648
> [    7.800793] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [    7.800810]  r5:edfe3400 r4:ee808dc8
> [    7.800836] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [    7.800846]  r10:c17ebe94 r9:00000000 r8:c0d3ede8 r7:00000001
> r6:00000000 r5:00000000
> [    7.800857]  r4:ee808c00
> [    7.800883] [<c04db4cc>] (redraw_screen) from [<c04dc234>]
> (do_bind_con_driver+0x2bc/0x394)
> [    7.800902]  r8:c0d3ede8 r7:00000001 r6:00000000 r5:c17ebe94 r4:00000000
> [    7.800926] [<c04dbf78>] (do_bind_con_driver) from [<c04dc700>]
> (do_take_over_console+0x15c/0x1c4)
> [    7.800949]  r10:00000001 r9:0000003e r8:00000000 r7:c17ebeb0
> r6:00000000 r5:00000000
> [    7.800957]  r4:00000000
> [    7.800969] [<c04dc5a4>] (do_take_over_console) from [<c0496830>]
> (do_fbcon_takeover+0x7c/0xd4)
> [    7.800979]  r10:edfe3694 r9:edfe3400 r8:00000000 r7:00000000
> r6:00000005 r5:c17e5a70
> [    7.800983]  r4:c1022ed8
> [    7.800994] [<c04967b4>] (do_fbcon_takeover) from [<c049a2d0>]
> (fbcon_event_notify+0x8c8/0x908)
> [    7.801000]  r5:c1022ed8 r4:c17e5a70
> [    7.801028] [<c0499a08>] (fbcon_event_notify) from [<c0147b5c>]
> (notifier_call_chain+0x4c/0x8c)
> [    7.801049]  r10:edfe3694 r9:edfe340c r8:00000000 r7:00000000
> r6:00000005 r5:edd15ab0
> [    7.801060]  r4:ffffffff
> [    7.801090] [<c0147b10>] (notifier_call_chain) from [<c0147fec>]
> (__blocking_notifier_call_chain+0x50/0x68)
> [    7.801110]  r9:edfe340c r8:c17e5a38 r7:ffffffff r6:edd15ab0
> r5:c1022cfc r4:00000005
> [    7.801123] [<c0147f9c>] (__blocking_notifier_call_chain) from
> [<c0148024>] (blocking_notifier_call_chain+0x20/0x28)
> [    7.801130]  r7:00000000 r6:c1007f10 r5:edfe3400 r4:c1007f10
> [    7.801143] [<c0148004>] (blocking_notifier_call_chain) from
> [<c048b8fc>] (fb_notifier_call_chain+0x20/0x24)
> [    7.801155] [<c048b8dc>] (fb_notifier_call_chain) from [<c048d8a0>]
> (register_framebuffer+0x1f8/0x2ac)
> [    7.801173] [<c048d6a8>] (register_framebuffer) from [<c05043f4>]
> (__drm_fb_helper_initial_config_and_unlock+0x220/0x414)
> [    7.801182]  r10:bf0a855c r9:00000000 r8:00000000 r7:c1031728
> r6:edc2f000 r5:edfe3400
> [    7.801187]  r4:edf56e00
> [    7.801200] [<c05041d4>]
> (__drm_fb_helper_initial_config_and_unlock) from [<c0504628>]
> (drm_fb_helper_initial_config+0x40/0x44)
> [    7.801209]  r10:bf0a855c r9:c1031d28 r8:00000010 r7:c0b450e0
> r6:edc2f000 r5:00000010
> [    7.801213]  r4:edf56e00
> [    7.801225] [<c05045e8>] (drm_fb_helper_initial_config) from
> [<c0504a9c>] (drm_fbdev_cma_init_with_funcs+0x88/0x100)
> [    7.801230]  r5:00000000 r4:edf56e00
> [    7.801241] [<c0504a14>] (drm_fbdev_cma_init_with_funcs) from
> [<c0504b28>] (drm_fbdev_cma_init+0x14/0x1c)
> [    7.801249]  r9:c1031d28 r8:00000000 r7:ed638c90 r6:eea12010
> r5:bf0ac000 r4:edc2f000
> [    7.801283] [<c0504b14>] (drm_fbdev_cma_init) from [<bf0a83e4>]
> (imx_drm_bind+0xf4/0x178 [imxdrm])
> [    7.801314] [<bf0a82f0>] (imx_drm_bind [imxdrm]) from [<c0532e7c>]
> (try_to_bring_up_master+0x25c/0x2dc)
> [    7.801323]  r9:c1031d28 r8:ed638450 r7:ed638940 r6:00000008
> r5:000000a0 r4:ed4d9580
> [    7.801333] [<c0532c20>] (try_to_bring_up_master) from [<c0532fac>]
> (component_add+0xb0/0x178)
> [    7.801341]  r10:00000000 r9:bf0ac160 r8:00000000 r7:ed638ac0
> r6:c1031d20 r5:00000000
> [    7.801345]  r4:ed638940
> [    7.801366] [<c0532efc>] (component_add) from [<bf0a8f2c>]
> (ipu_drm_probe+0x80/0xa4 [imxdrm])
> [    7.801374]  r9:bf0ac160 r8:00000000 r7:fffffdfb r6:bf0ac160
> r5:eddcfc10 r4:eddcfde0
> [    7.801400] [<bf0a8eac>] (ipu_drm_probe [imxdrm]) from [<c053b140>]
> (platform_drv_probe+0x58/0xb8)
> [    7.801406]  r5:ffffffed r4:eddcfc10
> [    7.801417] [<c053b0e8>] (platform_drv_probe) from [<c053926c>]
> (driver_probe_device+0x2d0/0x47c)
> [    7.801424]  r7:c17ee208 r6:c1075608 r5:c17ee204 r4:eddcfc10
> [    7.801443] [<c0538f9c>] (driver_probe_device) from [<c0539524>]
> (__driver_attach+0x10c/0x128)
> [    7.801455]  r10:bf0ac280 r9:c053b0e8 r8:00000000 r7:c1075530
> r6:bf0ac160 r5:eddcfc44
> [    7.801460]  r4:eddcfc10
> [    7.801480] [<c0539418>] (__driver_attach) from [<c0537160>]
> (bus_for_each_dev+0x70/0xa4)
> [    7.801496]  r7:c1075530 r6:c0539418 r5:bf0ac160 r4:00000000
> [    7.801522] [<c05370f0>] (bus_for_each_dev) from [<c0538a58>]
> (driver_attach+0x24/0x28)
> [    7.801536]  r6:c1032490 r5:edd76c00 r4:bf0ac160
> [    7.801548] [<c0538a34>] (driver_attach) from [<c0538438>]
> (bus_add_driver+0x1ac/0x26c)
> [    7.801566] [<c053828c>] (bus_add_driver) from [<c0539f80>]
> (driver_register+0x80/0xfc)
> [    7.801585]  r8:c053b0a4 r7:c053aa50 r6:c1075830 r5:00000001 r4:bf0ac160
> [    7.801611] [<c0539f00>] (driver_register) from [<c053b2ac>]
> (__platform_register_drivers+0x80/0x164)
> [    7.801626]  r5:00000001 r4:bf0ab090
> [    7.801665] [<c053b22c>] (__platform_register_drivers) from
> [<bf0b0020>] (imx_drm_init+0x20/0x1000 [imxdrm])
> [    7.801678]  r10:edd15f40 r9:edeb9070 r8:bf0ac2c8 r7:edeb9980
> r6:00000000 r5:bf0b0000
> [    7.801682]  r4:ffffe000
> [    7.801721] [<bf0b0000>] (imx_drm_init [imxdrm]) from [<c0101ba4>]
> (do_one_initcall+0x4c/0x174)
> [    7.801759] [<c0101b58>] (do_one_initcall) from [<c01b0880>]
> (do_init_module+0x68/0x1fc)
> [    7.801787]  r9:edeb9070 r8:bf0ac2c8 r6:bf0ac280 r5:00000001 r4:bf0ac280
> [    7.801815] [<c01b0818>] (do_init_module) from [<c01af89c>]
> (load_module+0x2064/0x270c)
> [    7.801835]  r7:edeb9040 r6:bf0ac280 r5:00000001 r4:00000001
> [    7.801859] [<c01ad838>] (load_module) from [<c01b01c4>]
> (SyS_finit_module+0xbc/0xf8)
> [    7.801882]  r10:00000000 r9:edd14000 r8:c0108da4 r7:0000017b
> r6:b6e24d40 r5:0000000f
> [    7.801896]  r4:00000000
> [    7.801927] [<c01b0108>] (SyS_finit_module) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [    7.801940]  r6:00000000 r5:bebb39f4 r4:7778f500
> [    7.801947] ---[ end trace 3e19c988c4369e1d ]---
> [    7.885327] imx-drm display-subsystem: fb0:  frame buffer device
> [    7.937166] [drm] Initialized imx-drm 1.0.0 20120507 for
> display-subsystem on minor 1
> [    8.694540] ------------[ cut here ]------------
> [    8.694576] WARNING: CPU: 0 PID: 464 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    8.694583] This function requires support for accurate vblank timestamps.
> [    8.694587] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [    8.694682] CPU: 0 PID: 464 Comm: setfont Tainted: G        W
> 4.14.0-rc7-gd65d313-dirty #1
> [    8.694687] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    8.694692] Backtrace:
> [    8.694713] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    8.694722]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
> [    8.694747] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    8.694766] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    8.694777]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    8.694783]  r4:ed5ab9f0 r3:00000000
> [    8.694797] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    8.694809]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    8.694824] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    8.694831]  r3:00000000 r2:c0d50064
> [    8.694835]  r4:edc2f000
> [    8.694847] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    8.694856]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edd94880
> [    8.694906] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    8.694916]  r5:edd94300 r4:edc2b018
> [    8.694946] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    8.694951]  r5:edd94300 r4:00000018
> [    8.694969] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    8.694980]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:edd94300 r5:bf0ab088
> [    8.694984]  r4:edd94300
> [    8.695007] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    8.695016]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    8.695021]  r4:edd94300 r3:bf0a8174
> [    8.695031] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    8.695037]  r5:00000000 r4:edd94300
> [    8.695054] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    8.695060]  r7:edd94300 r6:edc2f000 r5:edd94300 r4:00000000
> [    8.695075] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    8.695082]  r7:edd94300 r6:00000001 r5:0000003f r4:000000a0
> [    8.695093] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [    8.695101]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [    8.695106]  r4:edf56e00
> [    8.695129] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [    8.695138]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [    8.695143]  r4:edfe3400 r3:00000000
> [    8.695160] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [    8.695168]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
> r6:ee808c00 r5:edfe3400
> [    8.695173]  r4:edf57800 r3:c049a648
> [    8.695183] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [    8.695188]  r5:edfe3400 r4:ee808dc8
> [    8.695205] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [    8.695213]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
> r6:c17e5a70 r5:00000000
> [    8.695217]  r4:ee808c00
> [    8.695230] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
> (fbcon_do_set_font+0x1e0/0x27c)
> [    8.695238]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:00000000 r4:ee808c00
> [    8.695248] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
> (fbcon_set_font+0x208/0x224)
> [    8.695256]  r10:00001000 r9:0000003e r8:ed5abdd8 r7:20135b36
> r6:c17ec890 r5:0000003f
> [    8.695260]  r4:c17e7854
> [    8.695272] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
> (con_font_op+0x438/0x4f0)
> [    8.695282]  r10:00000000 r9:010719c8 r8:00000000 r7:ee808c00
> r6:00000001 r5:ee808c00
> [    8.695285]  r4:ed5abe40
> [    8.695304] [<c04e03ec>] (con_font_op) from [<c04d3694>]
> (vt_ioctl+0x14a0/0x199c)
> [    8.695312]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
> r6:00000001 r5:ee808c00
> [    8.695316]  r4:bee8a33c
> [    8.695336] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
> [    8.695345]  r10:00000000 r9:ed5aa000 r8:edfe9c00 r7:bee8a33c
> r6:ededf400 r5:edfe9c00
> [    8.695349]  r4:00004b72
> [    8.695363] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
> (do_vfs_ioctl+0xac/0xa2c)
> [    8.695374]  r9:ed5aa000 r8:00000003 r7:c023f474 r6:ededf400
> r5:ee90b3a8 r4:bee8a33c
> [    8.695382] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
> (SyS_ioctl+0x3c/0x64)
> [    8.695390]  r10:00000000 r9:ed5aa000 r8:bee8a33c r7:00004b72
> r6:ededf400 r5:00000003
> [    8.695394]  r4:ededf400
> [    8.695411] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [    8.695420]  r9:ed5aa000 r8:c0108da4 r7:00000036 r6:00000010
> r5:00000008 r4:00027128
> [    8.695425] ---[ end trace 3e19c988c4369e1e ]---
> [    8.732040] ------------[ cut here ]------------
> [    8.732072] WARNING: CPU: 1 PID: 469 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    8.732077] This function requires support for accurate vblank timestamps.
> [    8.732083] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [    8.732168] CPU: 1 PID: 469 Comm: setfont Tainted: G        W
> 4.14.0-rc7-gd65d313-dirty #1
> [    8.732175] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    8.732179] Backtrace:
> [    8.732196] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    8.732206]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
> [    8.732226] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    8.732246] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    8.732255]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    8.732260]  r4:ed0cd9f0 r3:00000000
> [    8.732271] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    8.732280]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    8.732297] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    8.732302]  r3:00000000 r2:c0d50064
> [    8.732306]  r4:edc2f000
> [    8.732316] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    8.732323]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edc80680
> [    8.732361] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    8.732367]  r5:ed1cdc00 r4:edc2b018
> [    8.732392] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    8.732397]  r5:ed1cdc00 r4:00000018
> [    8.732415] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    8.732426]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:ed1cdc00 r5:bf0ab088
> [    8.732430]  r4:ed1cdc00
> [    8.732454] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    8.732463]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    8.732467]  r4:ed1cdc00 r3:bf0a8174
> [    8.732477] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    8.732482]  r5:00000000 r4:ed1cdc00
> [    8.732497] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    8.732504]  r7:ed1cdc00 r6:edc2f000 r5:ed1cdc00 r4:00000000
> [    8.732519] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    8.732526]  r7:ed1cdc00 r6:00000001 r5:0000003f r4:000000a0
> [    8.732537] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [    8.732546]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [    8.732550]  r4:edf56e00
> [    8.732568] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [    8.732578]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [    8.732583]  r4:edfe3400 r3:00000000
> [    8.732600] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [    8.732615]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
> r6:ee808c00 r5:edfe3400
> [    8.732621]  r4:edf57800 r3:c049a648
> [    8.732638] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [    8.732645]  r5:edfe3400 r4:ee808dc8
> [    8.732663] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [    8.732674]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
> r6:c17e5a70 r5:00000000
> [    8.732678]  r4:ee808c00
> [    8.732694] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
> (fbcon_do_set_font+0x1e0/0x27c)
> [    8.732703]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:ee39c010 r4:ee808c00
> [    8.732715] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
> (fbcon_set_font+0x208/0x224)
> [    8.732726]  r10:c17e5bc8 r9:0000003e r8:ed0cddd8 r7:20135b36
> r6:c17ebfb4 r5:00000000
> [    8.732730]  r4:c17e5bc8
> [    8.732744] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
> (con_font_op+0x438/0x4f0)
> [    8.732755]  r10:00000000 r9:008379c8 r8:00000000 r7:ee808c00
> r6:00000001 r5:ee808c00
> [    8.732759]  r4:ed0cde40
> [    8.732777] [<c04e03ec>] (con_font_op) from [<c04d3694>]
> (vt_ioctl+0x14a0/0x199c)
> [    8.732788]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
> r6:00000001 r5:ee808c00
> [    8.732793]  r4:bed9434c
> [    8.732810] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
> [    8.732823]  r10:00000000 r9:ed0cc000 r8:edfe9c00 r7:bed9434c
> r6:ed0dbcc0 r5:edfe9c00
> [    8.732828]  r4:00004b72
> [    8.732847] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
> (do_vfs_ioctl+0xac/0xa2c)
> [    8.732856]  r9:ed0cc000 r8:00000003 r7:c023f474 r6:ed0dbcc0
> r5:ee90b3a8 r4:bed9434c
> [    8.732867] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
> (SyS_ioctl+0x3c/0x64)
> [    8.732877]  r10:00000000 r9:ed0cc000 r8:bed9434c r7:00004b72
> r6:ed0dbcc0 r5:00000003
> [    8.732882]  r4:ed0dbcc0
> [    8.732898] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [    8.732909]  r9:ed0cc000 r8:c0108da4 r7:00000036 r6:00000010
> r5:00000008 r4:00027128
> [    8.732914] ---[ end trace 3e19c988c4369e1f ]---
> [    8.903802] ------------[ cut here ]------------
> [    8.903857] WARNING: CPU: 2 PID: 483 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    8.903867] This function requires support for accurate vblank timestamps.
> [    8.903878] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [    8.904099] CPU: 2 PID: 483 Comm: setfont Tainted: G        W
> 4.14.0-rc7-gd65d313-dirty #1
> [    8.904110] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    8.904114] Backtrace:
> [    8.904145] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    8.904165]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
> [    8.904209] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    8.904238] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    8.904249]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    8.904255]  r4:ed0e39f0 r3:00000000
> [    8.904266] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    8.904274]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    8.904287] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    8.904293]  r3:00000000 r2:c0d50064
> [    8.904297]  r4:edc2f000
> [    8.904307] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    8.904314]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:edef7d00
> [    8.904349] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    8.904354]  r5:ed787480 r4:edc2b018
> [    8.904389] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    8.904407]  r5:ed787480 r4:00000018
> [    8.904444] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    8.904466]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:ed787480 r5:bf0ab088
> [    8.904474]  r4:ed787480
> [    8.904502] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    8.904511]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    8.904516]  r4:ed787480 r3:bf0a8174
> [    8.904529] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    8.904534]  r5:00000000 r4:ed787480
> [    8.904552] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    8.904561]  r7:ed787480 r6:edc2f000 r5:ed787480 r4:00000000
> [    8.904574] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    8.904581]  r7:ed787480 r6:00000001 r5:0000003f r4:000000a0
> [    8.904594] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [    8.904603]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [    8.904607]  r4:edf56e00
> [    8.904635] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [    8.904643]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [    8.904648]  r4:edfe3400 r3:00000000
> [    8.904665] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [    8.904673]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
> r6:ee808c00 r5:edfe3400
> [    8.904678]  r4:edf57800 r3:c049a648
> [    8.904690] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [    8.904695]  r5:edfe3400 r4:ee808dc8
> [    8.904713] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [    8.904722]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
> r6:c17e5a70 r5:00000000
> [    8.904726]  r4:ee808c00
> [    8.904737] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
> (fbcon_do_set_font+0x1e0/0x27c)
> [    8.904747]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:ee39c010 r4:ee808c00
> [    8.904757] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
> (fbcon_set_font+0x208/0x224)
> [    8.904765]  r10:c17e5bc8 r9:0000003e r8:ed0e3dd8 r7:20135b36
> r6:c17ebfb4 r5:00000000
> [    8.904769]  r4:c17e5bc8
> [    8.904782] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
> (con_font_op+0x438/0x4f0)
> [    8.904791]  r10:00000000 r9:00bdf9c8 r8:00000000 r7:ee808c00
> r6:00000001 r5:ee808c00
> [    8.904795]  r4:ed0e3e40
> [    8.904817] [<c04e03ec>] (con_font_op) from [<c04d3694>]
> (vt_ioctl+0x14a0/0x199c)
> [    8.904825]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
> r6:00000001 r5:ee808c00
> [    8.904829]  r4:bef4633c
> [    8.904851] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
> [    8.904860]  r10:00000000 r9:ed0e2000 r8:edfe8c00 r7:bef4633c
> r6:edebe000 r5:edfe8c00
> [    8.904865]  r4:00004b72
> [    8.904880] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
> (do_vfs_ioctl+0xac/0xa2c)
> [    8.904888]  r9:ed0e2000 r8:00000003 r7:c023f474 r6:edebe000
> r5:eeb242f8 r4:bef4633c
> [    8.904896] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
> (SyS_ioctl+0x3c/0x64)
> [    8.904905]  r10:00000000 r9:ed0e2000 r8:bef4633c r7:00004b72
> r6:edebe000 r5:00000003
> [    8.904909]  r4:edebe000
> [    8.904925] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [    8.904933]  r9:ed0e2000 r8:c0108da4 r7:00000036 r6:00000010
> r5:00000008 r4:00027128
> [    8.904939] ---[ end trace 3e19c988c4369e20 ]---
> [    8.961980] ------------[ cut here ]------------
> [    8.962005] WARNING: CPU: 2 PID: 488 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    8.962010] This function requires support for accurate vblank timestamps.
> [    8.962014] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [    8.962099] CPU: 2 PID: 488 Comm: setfont Tainted: G        W
> 4.14.0-rc7-gd65d313-dirty #1
> [    8.962104] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    8.962107] Backtrace:
> [    8.962126] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    8.962134]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
> [    8.962153] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    8.962168] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    8.962177]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    8.962182]  r4:ed41f9f0 r3:00000000
> [    8.962192] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    8.962200]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    8.962210] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    8.962215]  r3:00000000 r2:c0d50064
> [    8.962220]  r4:edc2f000
> [    8.962229] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    8.962236]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed787e80
> [    8.962268] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    8.962274]  r5:ed4f9200 r4:edc2b018
> [    8.962298] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    8.962304]  r5:ed4f9200 r4:00000018
> [    8.962321] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    8.962330]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:ed4f9200 r5:bf0ab088
> [    8.962334]  r4:ed4f9200
> [    8.962353] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    8.962362]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    8.962367]  r4:ed4f9200 r3:bf0a8174
> [    8.962376] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    8.962382]  r5:00000000 r4:ed4f9200
> [    8.962397] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    8.962404]  r7:ed4f9200 r6:edc2f000 r5:ed4f9200 r4:00000000
> [    8.962419] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    8.962426]  r7:ed4f9200 r6:00000001 r5:0000003f r4:000000a0
> [    8.962436] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [    8.962444]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [    8.962448]  r4:edf56e00
> [    8.962466] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [    8.962474]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [    8.962479]  r4:edfe3400 r3:00000000
> [    8.962493] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [    8.962501]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
> r6:ee808c00 r5:edfe3400
> [    8.962506]  r4:edf57800 r3:c049a648
> [    8.962516] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [    8.962521]  r5:edfe3400 r4:ee808dc8
> [    8.962535] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [    8.962543]  r10:00000000 r9:edfe3400 r8:00000008 r7:00000001
> r6:c17e5a70 r5:00000000
> [    8.962547]  r4:ee808c00
> [    8.962557] [<c04db4cc>] (redraw_screen) from [<c0498c50>]
> (fbcon_do_set_font+0x1e0/0x27c)
> [    8.962565]  r8:00000008 r7:c17e5bc8 r6:c17e5a70 r5:ee39c010 r4:ee808c00
> [    8.962574] [<c0498a70>] (fbcon_do_set_font) from [<c0498ff0>]
> (fbcon_set_font+0x208/0x224)
> [    8.962583]  r10:c17e5bc8 r9:0000003e r8:ed41fdd8 r7:20135b36
> r6:c17ebfb4 r5:00000000
> [    8.962587]  r4:c17e5bc8
> [    8.962600] [<c0498de8>] (fbcon_set_font) from [<c04e0824>]
> (con_font_op+0x438/0x4f0)
> [    8.962608]  r10:00000000 r9:00b409c8 r8:00000000 r7:ee808c00
> r6:00000001 r5:ee808c00
> [    8.962612]  r4:ed41fe40
> [    8.962632] [<c04e03ec>] (con_font_op) from [<c04d3694>]
> (vt_ioctl+0x14a0/0x199c)
> [    8.962641]  r10:00000000 r9:ee808dc8 r8:00000000 r7:00000051
> r6:00000001 r5:ee808c00
> [    8.962645]  r4:beb4f34c
> [    8.962668] [<c04d21f4>] (vt_ioctl) from [<c04c4c6c>] (tty_ioctl+0x190/0xbcc)
> [    8.962677]  r10:00000000 r9:ed41e000 r8:edfe8c00 r7:beb4f34c
> r6:ededa000 r5:edfe8c00
> [    8.962681]  r4:00004b72
> [    8.962697] [<c04c4adc>] (tty_ioctl) from [<c023eab8>]
> (do_vfs_ioctl+0xac/0xa2c)
> [    8.962705]  r9:ed41e000 r8:00000003 r7:c023f474 r6:ededa000
> r5:eeb242f8 r4:beb4f34c
> [    8.962714] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
> (SyS_ioctl+0x3c/0x64)
> [    8.962723]  r10:00000000 r9:ed41e000 r8:beb4f34c r7:00004b72
> r6:ededa000 r5:00000003
> [    8.962727]  r4:ededa000
> [    8.962743] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [    8.962755]  r9:ed41e000 r8:c0108da4 r7:00000036 r6:00000010
> r5:00000008 r4:00027128
> [    8.962765] ---[ end trace 3e19c988c4369e21 ]---
> [    8.966733] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
> 120000.hdmi: failed to get edid
> [    8.967669] ------------[ cut here ]------------
> [    8.967706] WARNING: CPU: 1 PID: 15 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [    8.967712] This function requires support for accurate vblank timestamps.
> [    8.967716] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [    8.967804] CPU: 1 PID: 15 Comm: kworker/1:0 Tainted: G        W
>    4.14.0-rc7-gd65d313-dirty #1
> [    8.967809] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    8.967831] Workqueue: events output_poll_execute
> [    8.967838] Backtrace:
> [    8.967860] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [    8.967868]  r7:c106eed0 r6:00000000 r5:600d0193 r4:c106eed0
> [    8.967891] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [    8.967909] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [    8.967919]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [    8.967924]  r4:ee8a7c00 r3:00000000
> [    8.967934] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [    8.967943]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [    8.967954] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [    8.967960]  r3:00000000 r2:c0d50064
> [    8.967964]  r4:edc2f000
> [    8.967975] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [    8.967982]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed1cd900
> [    8.968020] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [    8.968027]  r5:ed1cd080 r4:edc2b018
> [    8.968051] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [    8.968057]  r5:ed1cd080 r4:00000018
> [    8.968076] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [    8.968085]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:ed1cd080 r5:bf0ab088
> [    8.968089]  r4:ed1cd080
> [    8.968107] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [    8.968116]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [    8.968121]  r4:ed1cd080 r3:bf0a8174
> [    8.968131] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [    8.968136]  r5:00000000 r4:ed1cd080
> [    8.968151] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [    8.968159]  r7:ed1cd080 r6:edc2f000 r5:ed1cd080 r4:00000000
> [    8.968172] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [    8.968179]  r7:ed1cd080 r6:00000001 r5:0000003f r4:000000a0
> [    8.968192] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c0501724>] (restore_fbdev_mode+0x30/0x168)
> [    8.968200]  r10:00000001 r9:00000000 r8:edc2f254 r7:edf56e00
> r6:edf56ed0 r5:edf56ed0
> [    8.968204]  r4:edf56e00
> [    8.968219] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
> [    8.968227]  r10:00000001 r9:00000000 r8:edc2f254 r7:00000001
> r6:edf56ed0 r5:edf56ed0
> [    8.968231]  r4:edf56e00
> [    8.968246] [<c0504718>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c0504834>]
> (drm_fb_helper_set_par+0x5c/0x8c)
> [    8.968252]  r7:00000001 r6:edf56ed0 r5:00000000 r4:00000000
> [    8.968263] [<c05047d8>] (drm_fb_helper_set_par) from [<c05046d0>]
> (drm_fb_helper_hotplug_event.part.7+0xa4/0xbc)
> [    8.968268]  r5:00000000 r4:edf56e00
> [    8.968280] [<c050462c>] (drm_fb_helper_hotplug_event.part.7) from
> [<c0504714>] (drm_fb_helper_hotplug_event+0x2c/0x30)
> [    8.968286]  r7:00000001 r6:00000000 r5:edc2f000 r4:edc2f000
> [    8.968297] [<c05046e8>] (drm_fb_helper_hotplug_event) from
> [<c0504e34>] (drm_fbdev_cma_hotplug_event+0x18/0x1c)
> [    8.968321] [<c0504e1c>] (drm_fbdev_cma_hotplug_event) from
> [<bf0a82d0>] (imx_drm_output_poll_changed+0x18/0x1c [imxdrm])
> [    8.968348] [<bf0a82b8>] (imx_drm_output_poll_changed [imxdrm])
> from [<c04f3fbc>] (drm_kms_helper_hotplug_event+0x2c/0x30)
> [    8.968360] [<c04f3f90>] (drm_kms_helper_hotplug_event) from
> [<c04f41a0>] (output_poll_execute+0x190/0x1a4)
> [    8.968366]  r5:edc2f000 r4:edc2f418
> [    8.968381] [<c04f4010>] (output_poll_execute) from [<c013f1c4>]
> (process_one_work+0x258/0x4f0)
> [    8.968389]  r10:00000001 r9:00000000 r8:eefaed00 r7:ee8a7ef8
> r6:eefabcc0 r5:ee83bb00
> [    8.968393]  r4:edc2f418
> [    8.968403] [<c013ef6c>] (process_one_work) from [<c01400e8>]
> (worker_thread+0x58/0x59c)
> [    8.968412]  r10:ee8a6000 r9:eefabcf4 r8:c1004900 r7:00000008
> r6:ee83bb18 r5:eefabcc0
> [    8.968416]  r4:ee83bb00
> [    8.968427] [<c0140090>] (worker_thread) from [<c01462c0>]
> (kthread+0x140/0x16c)
> [    8.968435]  r10:ee85bd94 r9:ee83bc38 r8:ee83bb00 r7:ee8a6000
> r6:ee840180 r5:00000000
> [    8.968439]  r4:ee83bc00
> [    8.968453] [<c0146180>] (kthread) from [<c0108c88>]
> (ret_from_fork+0x14/0x2c)
> [    8.968461]  r10:00000000 r9:00000000 r8:00000000 r7:00000000
> r6:00000000 r5:c0146180
> [    8.968465]  r4:ee840180
> [    8.968471] ---[ end trace 3e19c988c4369e22 ]---
> [   10.604619] Atheros 8035 ethernet 2188000.ethernet-1:01: attached
> PHY driver [Atheros 8035 ethernet]
> (mii_bus:phy_addr=2188000.ethernet-1:01, irq=POLL)
> [   10.605926] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [   14.077150] fec 2188000.ethernet eth0: Link is Up - 1Gbps/Full -
> flow control rx/tx
> [   14.078035] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> [   17.600543] ------------[ cut here ]------------
> [   17.600578] WARNING: CPU: 2 PID: 782 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [   17.600582] This function requires support for accurate vblank timestamps.
> [   17.600586] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [   17.600672] CPU: 2 PID: 782 Comm: Xorg.wrap Tainted: G        W
>   4.14.0-rc7-gd65d313-dirty #1
> [   17.600676] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [   17.600680] Backtrace:
> [   17.600697] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [   17.600705]  r7:c106eed0 r6:00000000 r5:600f0093 r4:c106eed0
> [   17.600723] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [   17.600737] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [   17.600746]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [   17.600751]  r4:ed059c80 r3:00000000
> [   17.600760] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [   17.600769]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [   17.600781] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [   17.600786]  r3:00000000 r2:c0d50064
> [   17.600790]  r4:edc2f000
> [   17.600800] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [   17.600807]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed042b00
> [   17.600836] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [   17.600844]  r5:ed409300 r4:edc2b018
> [   17.600867] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [   17.600874]  r5:ed409300 r4:00000018
> [   17.600892] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [   17.600901]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:ed409300 r5:bf0ab088
> [   17.600905]  r4:ed409300
> [   17.600923] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [   17.600932]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [   17.600937]  r4:ed409300 r3:bf0a8174
> [   17.600947] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [   17.600952]  r5:00000000 r4:ed409300
> [   17.600968] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [   17.600975]  r7:ed409300 r6:edc2f000 r5:ed409300 r4:00000000
> [   17.600987] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [   17.600993]  r7:ed409300 r6:00000001 r5:0000003f r4:000000a0
> [   17.601004] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c0501724>] (restore_fbdev_mode+0x30/0x168)
> [   17.601012]  r10:edf5ecec r9:edc2f214 r8:00000000 r7:edf56e00
> r6:edf5ed00 r5:edf56ed0
> [   17.601016]  r4:edf56e00
> [   17.601029] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
> [   17.601037]  r10:edf5ecec r9:edc2f214 r8:00000000 r7:edc2f0f0
> r6:edf5ed00 r5:edf56ed0
> [   17.601041]  r4:edf56e00
> [   17.601053] [<c0504718>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c05047cc>]
> (drm_fb_helper_restore_fbdev_mode_unlocked+0x38/0x44)
> [   17.601060]  r7:edc2f0f0 r6:edf5ed00 r5:edc2f000 r4:edc2f000
> [   17.601071] [<c0504794>]
> (drm_fb_helper_restore_fbdev_mode_unlocked) from [<c0504e18>]
> (drm_fbdev_cma_restore_mode+0x18/0x1c)
> [   17.601091] [<c0504e00>] (drm_fbdev_cma_restore_mode) from
> [<bf0a82ec>] (imx_drm_driver_lastclose+0x18/0x1c [imxdrm])
> [   17.601108] [<bf0a82d4>] (imx_drm_driver_lastclose [imxdrm]) from
> [<c0508ec0>] (drm_lastclose+0x40/0xd4)
> [   17.601117] [<c0508e80>] (drm_lastclose) from [<c05091fc>]
> (drm_release+0x2a8/0x364)
> [   17.601123]  r5:edc2f000 r4:edf5ec00
> [   17.601137] [<c0508f54>] (drm_release) from [<c022bf20>] (__fput+0x94/0x1e0)
> [   17.601146]  r10:00000008 r9:ed759f28 r8:00000000 r7:edb5fc38
> r6:ee8d9410 r5:ed759f28
> [   17.601150]  r4:edee97c0
> [   17.601158] [<c022be8c>] (__fput) from [<c022c0cc>] (____fput+0x10/0x14)
> [   17.601167]  r10:00000000 r9:edee97c0 r8:c1087070 r7:edfc5dc4
> r6:edfc5940 r5:edfc5d94
> [   17.601171]  r4:00000000
> [   17.601186] [<c022c0bc>] (____fput) from [<c0144754>]
> (task_work_run+0x9c/0xc0)
> [   17.601202] [<c01446b8>] (task_work_run) from [<c010cc70>]
> (do_work_pending+0x94/0xbc)
> [   17.601210]  r9:ed058000 r8:c0108da4 r7:ed059fb0 r6:c0108da4
> r5:ed058000 r4:00000004
> [   17.601220] [<c010cbdc>] (do_work_pending) from [<c0108c14>]
> (slow_work_pending+0xc/0x20)
> [   17.601227]  r7:00000006 r6:00000003 r5:be9c9cb4 r4:00000001
> [   17.601231] ---[ end trace 3e19c988c4369e23 ]---
> [   17.609550] ------------[ cut here ]------------
> [   17.609591] WARNING: CPU: 3 PID: 783 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [   17.609599] This function requires support for accurate vblank timestamps.
> [   17.609603] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [   17.609687] CPU: 3 PID: 783 Comm: (agetty) Tainted: G        W
>  4.14.0-rc7-gd65d313-dirty #1
> [   17.609692] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [   17.609696] Backtrace:
> [   17.609715] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [   17.609726]  r7:c106eed0 r6:00000000 r5:600b0093 r4:c106eed0
> [   17.609744] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [   17.609760] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [   17.609769]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [   17.609774]  r4:ed5e99b8 r3:00000000
> [   17.609784] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [   17.609793]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [   17.609804] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [   17.609811]  r3:00000000 r2:c0d50064
> [   17.609815]  r4:edc2f000
> [   17.609825] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [   17.609832]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed043980
> [   17.609872] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [   17.609878]  r5:edc3f780 r4:edc2b018
> [   17.609908] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [   17.609914]  r5:edc3f780 r4:00000018
> [   17.609933] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [   17.609942]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:edc3f780 r5:bf0ab088
> [   17.609947]  r4:edc3f780
> [   17.609971] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [   17.609980]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [   17.609985]  r4:edc3f780 r3:bf0a8174
> [   17.609996] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [   17.610002]  r5:00000000 r4:edc3f780
> [   17.610020] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [   17.610029]  r7:edc3f780 r6:edc2f000 r5:edc3f780 r4:00000000
> [   17.610043] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [   17.610050]  r7:edc3f780 r6:00000001 r5:0000003f r4:000000a0
> [   17.610061] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [   17.610070]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [   17.610074]  r4:edf56e00
> [   17.610104] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [   17.610116]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [   17.610121]  r4:edfe3400 r3:00000000
> [   17.610137] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [   17.610146]  r10:00000000 r9:edf57800 r8:c17e5bc8 r7:c17e5a70
> r6:ee808c00 r5:edfe3400
> [   17.610152]  r4:edf57800 r3:c049a648
> [   17.610163] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [   17.610170]  r5:edfe3400 r4:ee808dc8
> [   17.610188] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [   17.610200]  r10:0000000a r9:ee808c00 r8:00000000 r7:00000001
> r6:ee808e34 r5:00000000
> [   17.610205]  r4:ee808c00
> [   17.610219] [<c04db4cc>] (redraw_screen) from [<c04db848>]
> (csi_J+0x134/0x160)
> [   17.610227]  r8:00000000 r7:c0bb934c r6:ee808e34 r5:ed4d4c00 r4:ee808c00
> [   17.610240] [<c04db714>] (csi_J) from [<c04df7cc>]
> (do_con_trol+0x14b8/0x1688)
> [   17.610247]  r7:c0bb934c r6:ed4d4c00 r5:ed4d4c00 r4:ee808c00
> [   17.610259] [<c04de314>] (do_con_trol) from [<c04dfba8>]
> (do_con_write.part.9+0x20c/0x95c)
> [   17.610268]  r10:0000000a r9:ee808c00 r8:00000000 r7:c0bb934c
> r6:ed4d4c00 r5:ffffffff
> [   17.610272]  r4:0000004a
> [   17.610282] [<c04df99c>] (do_con_write.part.9) from [<c04e03dc>]
> (con_write+0x80/0x90)
> [   17.610291]  r10:00000000 r9:f27e529c r8:edef2b40 r7:c0bb934c
> r6:ed4d4c00 r5:0000000a
> [   17.610295]  r4:ffffe000
> [   17.610320] [<c04e035c>] (con_write) from [<c04c7dc8>]
> (n_tty_write+0x1c8/0x45c)
> [   17.610327]  r7:c0bb934c r6:ed4d4000 r5:0000000a r4:ed4d4c00
> [   17.610339] [<c04c7c00>] (n_tty_write) from [<c04c3e80>]
> (tty_write+0x1f8/0x314)
> [   17.610347]  r10:00000400 r9:ed5e8000 r8:00000000 r7:0000000a
> r6:004dc55c r5:0000000a
> [   17.610351]  r4:ed4d4c00
> [   17.610374] [<c04c3c88>] (tty_write) from [<c022ade8>]
> (__vfs_write+0x34/0x134)
> [   17.610382]  r10:00000000 r9:0000000a r8:ed5e9f78 r7:ed5e9f78
> r6:004dc55c r5:c04c3c88
> [   17.610386]  r4:edef2b40
> [   17.610396] [<c022adb4>] (__vfs_write) from [<c022b06c>]
> (vfs_write+0xac/0x170)
> [   17.610404]  r10:00000000 r9:0000000a r8:00000000 r7:ed5e9f78
> r6:004dc55c r5:edef2b40
> [   17.610408]  r4:0000000a
> [   17.610418] [<c022afc0>] (vfs_write) from [<c022b248>] (SyS_write+0x44/0x98)
> [   17.610429]  r9:0000000a r8:004dc55c r7:00000000 r6:00000000
> r5:edef2b40 r4:edef2b40
> [   17.610448] [<c022b204>] (SyS_write) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [   17.610460]  r9:ed5e8000 r8:c0108da4 r7:00000004 r6:00000003
> r5:004dc55c r4:0000000a
> [   17.610466] ---[ end trace 3e19c988c4369e24 ]---
> [   17.768287] ------------[ cut here ]------------
> [   17.768355] WARNING: CPU: 2 PID: 782 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [   17.768365] This function requires support for accurate vblank timestamps.
> [   17.768373] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [   17.768564] CPU: 2 PID: 782 Comm: Xorg Tainted: G        W
> 4.14.0-rc7-gd65d313-dirty #1
> [   17.768573] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [   17.768581] Backtrace:
> [   17.768608] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [   17.768621]  r7:c106eed0 r6:00000000 r5:60070093 r4:c106eed0
> [   17.768646] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [   17.768668] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [   17.768683]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [   17.768693]  r4:ed059c80 r3:00000006
> [   17.768709] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [   17.768724]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [   17.768742] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [   17.768752]  r3:00000000 r2:c0d50064
> [   17.768761]  r4:edc2f000
> [   17.768776] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [   17.768788]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed045800
> [   17.768827] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [   17.768838]  r5:ed045200 r4:edc2b018
> [   17.768869] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [   17.768880]  r5:ed045200 r4:00000018
> [   17.768905] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [   17.768921]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:ed045200 r5:bf0ab088
> [   17.768930]  r4:ed045200
> [   17.768957] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [   17.768972]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [   17.768982]  r4:ed045200 r3:bf0a8174
> [   17.768998] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [   17.769008]  r5:00000000 r4:ed045200
> [   17.769030] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [   17.769042]  r7:ed045200 r6:edc2f000 r5:ed045200 r4:00000000
> [   17.769061] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [   17.769074]  r7:ed045200 r6:00000001 r5:0000003f r4:000000a0
> [   17.769091] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c0501724>] (restore_fbdev_mode+0x30/0x168)
> [   17.769105]  r10:ed43baec r9:edc2f214 r8:00000000 r7:edf56e00
> r6:ed43bb00 r5:edf56ed0
> [   17.769113]  r4:edf56e00
> [   17.769133] [<c05016f4>] (restore_fbdev_mode) from [<c0504740>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8+0x28/0x7c)
> [   17.769147]  r10:ed43baec r9:edc2f214 r8:00000000 r7:edc2f0f0
> r6:ed43bb00 r5:edf56ed0
> [   17.769156]  r4:edf56e00
> [   17.769174] [<c0504718>]
> (drm_fb_helper_restore_fbdev_mode_unlocked.part.8) from [<c05047cc>]
> (drm_fb_helper_restore_fbdev_mode_unlocked+0x38/0x44)
> [   17.769186]  r7:edc2f0f0 r6:ed43bb00 r5:edc2f000 r4:edc2f000
> [   17.769204] [<c0504794>]
> (drm_fb_helper_restore_fbdev_mode_unlocked) from [<c0504e18>]
> (drm_fbdev_cma_restore_mode+0x18/0x1c)
> [   17.769234] [<c0504e00>] (drm_fbdev_cma_restore_mode) from
> [<bf0a82ec>] (imx_drm_driver_lastclose+0x18/0x1c [imxdrm])
> [   17.769261] [<bf0a82d4>] (imx_drm_driver_lastclose [imxdrm]) from
> [<c0508ec0>] (drm_lastclose+0x40/0xd4)
> [   17.769275] [<c0508e80>] (drm_lastclose) from [<c05091fc>]
> (drm_release+0x2a8/0x364)
> [   17.769286]  r5:edc2f000 r4:ed43ba00
> [   17.769308] [<c0508f54>] (drm_release) from [<c022bf20>] (__fput+0x94/0x1e0)
> [   17.769322]  r10:00000008 r9:ed759f28 r8:00000000 r7:edb5fc38
> r6:ee8d9410 r5:ed759f28
> [   17.769331]  r4:edee8280
> [   17.769345] [<c022be8c>] (__fput) from [<c022c0cc>] (____fput+0x10/0x14)
> [   17.769359]  r10:00000000 r9:edee8280 r8:c1087070 r7:edfc5dc4
> r6:edfc5940 r5:edfc5d94
> [   17.769368]  r4:00000000
> [   17.769388] [<c022c0bc>] (____fput) from [<c0144754>]
> (task_work_run+0x9c/0xc0)
> [   17.769413] [<c01446b8>] (task_work_run) from [<c010cc70>]
> (do_work_pending+0x94/0xbc)
> [   17.769427]  r9:ed058000 r8:c0108da4 r7:ed059fb0 r6:c0108da4
> r5:ed058000 r4:00000004
> [   17.769444] [<c010cbdc>] (do_work_pending) from [<c0108c14>]
> (slow_work_pending+0xc/0x20)
> [   17.769457]  r7:00000006 r6:021d01e0 r5:00000000 r4:0000000a
> [   17.769466] ---[ end trace 3e19c988c4369e25 ]---
> [   17.848753] ------------[ cut here ]------------
> [   17.848786] WARNING: CPU: 0 PID: 29 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [   17.848790] This function requires support for accurate vblank timestamps.
> [   17.848795] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [   17.848879] CPU: 0 PID: 29 Comm: kworker/0:1 Tainted: G        W
>    4.14.0-rc7-gd65d313-dirty #1
> [   17.848884] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [   17.848896] Workqueue: events console_callback
> [   17.848904] Backtrace:
> [   17.848919] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [   17.848928]  r7:c106eed0 r6:00000000 r5:60080093 r4:c106eed0
> [   17.848944] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [   17.848959] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [   17.848968]  r10:edf56e00 r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [   17.848973]  r4:ee993b48 r3:00000000
> [   17.848983] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [   17.848991]  r9:edc2f3e0 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [   17.849002] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [   17.849007]  r3:00000000 r2:c0d50064
> [   17.849011]  r4:edc2f000
> [   17.849021] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [   17.849028]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed1cca80
> [   17.849070] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [   17.849086]  r5:ed1cc580 r4:edc2b018
> [   17.849131] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [   17.849147]  r5:ed1cc580 r4:00000018
> [   17.849174] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [   17.849193]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:ed1cc580 r5:bf0ab088
> [   17.849207]  r4:ed1cc580
> [   17.849249] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [   17.849271]  r10:edf56e00 r9:edc2f3e0 r8:edfafdf8 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [   17.849283]  r4:ed1cc580 r3:bf0a8174
> [   17.849296] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [   17.849301]  r5:00000000 r4:ed1cc580
> [   17.849319] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [   17.849326]  r7:ed1cc580 r6:edc2f000 r5:ed1cc580 r4:00000000
> [   17.849339] [<c051c0e4>] (drm_atomic_commit) from [<c0501698>]
> (restore_fbdev_mode_atomic+0x19c/0x1f8)
> [   17.849346]  r7:ed1cc580 r6:00000001 r5:0000003f r4:000000a0
> [   17.849369] [<c05014fc>] (restore_fbdev_mode_atomic) from
> [<c05019a4>] (drm_fb_helper_pan_display+0xb0/0x1bc)
> [   17.849389]  r10:00000000 r9:c04feb78 r8:edfe3400 r7:edf5781c
> r6:00000000 r5:edf56ed0
> [   17.849404]  r4:edf56e00
> [   17.849443] [<c05018f4>] (drm_fb_helper_pan_display) from
> [<c048bc58>] (fb_pan_display+0xd4/0x140)
> [   17.849456]  r10:00000000 r9:edf57800 r8:00000438 r7:00000000
> r6:00000000 r5:edf5781c
> [   17.849461]  r4:edfe3400 r3:00000000
> [   17.849488] [<c048bb84>] (fb_pan_display) from [<c049a664>]
> (bit_update_start+0x1c/0x38)
> [   17.849500]  r10:00000000 r9:edf57800 r8:c17e5e80 r7:c17e5a70
> r6:ed686000 r5:edfe3400
> [   17.849506]  r4:edf57800 r3:c049a648
> [   17.849517] [<c049a648>] (bit_update_start) from [<c049934c>]
> (fbcon_switch+0x340/0x558)
> [   17.849522]  r5:edfe3400 r4:ed6861c8
> [   17.849534] [<c049900c>] (fbcon_switch) from [<c04db61c>]
> (redraw_screen+0x150/0x248)
> [   17.849543]  r10:00000001 r9:00000000 r8:ee808c00 r7:00000001
> r6:c17ebe94 r5:00000001
> [   17.849547]  r4:ed686000
> [   17.849563] [<c04db4cc>] (redraw_screen) from [<c04d2158>]
> (complete_change_console+0x44/0xe0)
> [   17.849571]  r8:eef9ed00 r7:00000000 r6:eef9bcc0 r5:00000000 r4:ed686000
> [   17.849599] [<c04d2114>] (complete_change_console) from
> [<c04d3c44>] (change_console+0x74/0xa0)
> [   17.849617]  r7:ee993ef8 r6:eef9bcc0 r5:ee808c00 r4:ed686000
> [   17.849645] [<c04d3bd0>] (change_console) from [<c04de00c>]
> (console_callback+0xf0/0x150)
> [   17.849661]  r5:c102e7ac r4:c17ebe94
> [   17.849689] [<c04ddf1c>] (console_callback) from [<c013f1c4>]
> (process_one_work+0x258/0x4f0)
> [   17.849697]  r5:ee842680 r4:c102e7f8
> [   17.849707] [<c013ef6c>] (process_one_work) from [<c01400e8>]
> (worker_thread+0x58/0x59c)
> [   17.849730]  r10:ee992000 r9:eef9bcf4 r8:c1004900 r7:00000008
> r6:ee842698 r5:eef9bcc0
> [   17.849743]  r4:ee842680
> [   17.849769] [<c0140090>] (worker_thread) from [<c01462c0>]
> (kthread+0x140/0x16c)
> [   17.849791]  r10:ee87de74 r9:ee855238 r8:ee842680 r7:ee992000
> r6:ee963ec0 r5:00000000
> [   17.849805]  r4:ee855200
> [   17.849828] [<c0146180>] (kthread) from [<c0108c88>]
> (ret_from_fork+0x14/0x2c)
> [   17.849852]  r10:00000000 r9:00000000 r8:00000000 r7:00000000
> r6:00000000 r5:c0146180
> [   17.849864]  r4:ee963ec0
> [   17.849877] ---[ end trace 3e19c988c4369e26 ]---
> [   17.878902] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
> 120000.hdmi: failed to get edid
> [   17.879975] dw_hdmi_connector_get_modes:1917: dwhdmi-imx
> 120000.hdmi: failed to get edid
> [   17.919734] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
> powered down in 0 iterations
> [   17.928202] dw_hdmi_setup:1679: dwhdmi-imx 120000.hdmi: Non-CEA
> mode used in HDMI
> [   17.928222] hdmi_av_composer:1495: dwhdmi-imx 120000.hdmi: final
> pixclk = 65000000
> [   17.928266] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
> powered down in 0 iterations
> [   17.939476] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
> PLL locked 1 iterations
> [   17.939504] dw_hdmi_phy_power_off:1096: dwhdmi-imx 120000.hdmi: PHY
> powered down in 0 iterations
> [   17.950712] dw_hdmi_phy_power_on:1133: dwhdmi-imx 120000.hdmi: PHY
> PLL locked 1 iterations
> [   17.950743] dw_hdmi_setup:1744: dwhdmi-imx 120000.hdmi:
> dw_hdmi_setup DVI mode
> [   17.951224] ------------[ cut here ]------------
> [   17.951269] WARNING: CPU: 0 PID: 782 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [   17.951277] This function requires support for accurate vblank timestamps.
> [   17.951285] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [   17.951438] CPU: 0 PID: 782 Comm: Xorg Tainted: G        W
> 4.14.0-rc7-gd65d313-dirty #1
> [   17.951445] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [   17.951451] Backtrace:
> [   17.951474] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [   17.951485]  r7:c106eed0 r6:00000000 r5:600e0093 r4:c106eed0
> [   17.951505] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [   17.951523] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [   17.951535]  r10:000000ab r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [   17.951543]  r4:ed059c08 r3:00000006
> [   17.951556] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [   17.951567]  r9:00000000 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [   17.951580] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [   17.951588]  r3:00000000 r2:c0d50064
> [   17.951595]  r4:edc2f000
> [   17.951608] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [   17.951618]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ee34b380
> [   17.951649] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [   17.951658]  r5:ee34b480 r4:edc2b018
> [   17.951685] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [   17.951693]  r5:ee34b480 r4:00000018
> [   17.951713] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [   17.951726]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
> r6:ee34b480 r5:bf0ab088
> [   17.951733]  r4:ee34b480
> [   17.951754] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [   17.951766]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [   17.951773]  r4:ee34b480 r3:bf0a8174
> [   17.951786] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [   17.951794]  r5:00000000 r4:ee34b480
> [   17.951810] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [   17.951820]  r7:00000000 r6:edc2f000 r5:ee34b480 r4:00000000
> [   17.951836] [<c051c0e4>] (drm_atomic_commit) from [<c051d2fc>]
> (drm_atomic_connector_commit_dpms+0xf0/0x100)
> [   17.951846]  r7:00000000 r6:edc2c010 r5:ee34b480 r4:00000001
> [   17.951859] [<c051d20c>] (drm_atomic_connector_commit_dpms) from
> [<c0522a64>] (drm_mode_obj_set_property_ioctl+0x1b4/0x2ac)
> [   17.951871]  r9:ee34b480 r8:00000000 r7:00000000 r6:ed059d78
> r5:edc2c024 r4:edd76980
> [   17.951884] [<c05228b0>] (drm_mode_obj_set_property_ioctl) from
> [<c0521378>] (drm_mode_connector_property_set_ioctl+0x40/0x48)
> [   17.951896]  r10:000000ab r9:c01064ab r8:ed059e60 r7:c0521338
> r6:edc2f000 r5:00000000
> [   17.951903]  r4:00000000
> [   17.951919] [<c0521338>] (drm_mode_connector_property_set_ioctl)
> from [<c050a7e0>] (drm_ioctl_kernel+0x70/0xb0)
> [   17.951927]  r5:ed43b200 r4:0000001a
> [   17.951939] [<c050a770>] (drm_ioctl_kernel) from [<c050ac78>]
> (drm_ioctl+0x2a4/0x3ac)
> [   17.951950]  r9:c01064ab r8:ed43b200 r7:ed059e60 r6:c0b45b9c
> r5:00000010 r4:00000010
> [   17.951964] [<c050a9d4>] (drm_ioctl) from [<c023eab8>]
> (do_vfs_ioctl+0xac/0xa2c)
> [   17.951975]  r10:00000000 r9:ed058000 r8:0000000b r7:c023f474
> r6:edee9b80 r5:ed759f28
> [   17.951982]  r4:bea337d0
> [   17.951996] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
> (SyS_ioctl+0x3c/0x64)
> [   17.952007]  r10:00000000 r9:ed058000 r8:bea337d0 r7:c01064ab
> r6:edee9b80 r5:0000000b
> [   17.952014]  r4:edee9b80
> [   17.952029] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [   17.952041]  r9:ed058000 r8:c0108da4 r7:00000036 r6:c01064ab
> r5:bea337d0 r4:00000000
> [   17.952048] ---[ end trace 3e19c988c4369e27 ]---
> [   19.108300] ------------[ cut here ]------------
> [   19.108329] WARNING: CPU: 2 PID: 782 at
> drivers/gpu/drm/drm_vblank.c:303
> drm_crtc_accurate_vblank_count+0x80/0x84
> [   19.108337] This function requires support for accurate vblank timestamps.
> [   19.108344] Modules linked in: dw_hdmi_cec dw_hdmi_ahb_audio
> snd_soc_imx_sgtl5000 snd_soc_imx_spdif snd_soc_fsl_asoc_card
> snd_ac97_codec coda videobuf2_dma_contig imx_vdoa v4l2_mem2mem
> videobuf2_vmalloc videobuf2_memops dw_hdmi_imx imxdrm dw_hdmi cec
> etnaviv imx_ipu_v3 binfmt_misc parport_pc ppdev lp parport
> [   19.108497] CPU: 2 PID: 782 Comm: Xorg Tainted: G        W
> 4.14.0-rc7-gd65d313-dirty #1
> [   19.108506] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [   19.108513] Backtrace:
> [   19.108533] [<c010d558>] (dump_backtrace) from [<c010d838>]
> (show_stack+0x18/0x1c)
> [   19.108544]  r7:c106eed0 r6:00000000 r5:60000093 r4:c106eed0
> [   19.108562] [<c010d820>] (show_stack) from [<c09ff10c>]
> (dump_stack+0xac/0xd8)
> [   19.108579] [<c09ff060>] (dump_stack) from [<c0122d78>] (__warn+0xec/0x104)
> [   19.108592]  r10:000000ab r9:c0527bd8 r8:0000012f r7:00000009
> r6:c0d4fc08 r5:00000000
> [   19.108600]  r4:ed059c08 r3:00000006
> [   19.108612] [<c0122c8c>] (__warn) from [<c0122dd0>]
> (warn_slowpath_fmt+0x40/0x48)
> [   19.108624]  r9:00000000 r8:00000001 r7:edc2f000 r6:00000000
> r5:edc2f000 r4:c0d50064
> [   19.108638] [<c0122d94>] (warn_slowpath_fmt) from [<c0527bd8>]
> (drm_crtc_accurate_vblank_count+0x80/0x84)
> [   19.108646]  r3:00000000 r2:c0d50064
> [   19.108653]  r4:edc2f000
> [   19.108665] [<c0527b58>] (drm_crtc_accurate_vblank_count) from
> [<c052800c>] (drm_crtc_arm_vblank_event+0x30/0x64)
> [   19.108675]  r7:edc2f000 r6:00000001 r5:edc2f000 r4:ed042180
> [   19.108709] [<c0527fdc>] (drm_crtc_arm_vblank_event) from
> [<bf0a89bc>] (ipu_crtc_atomic_begin+0x50/0x80 [imxdrm])
> [   19.108718]  r5:ed042c80 r4:edc2b018
> [   19.108742] [<bf0a896c>] (ipu_crtc_atomic_begin [imxdrm]) from
> [<c04fa720>] (drm_atomic_helper_commit_planes+0x8c/0x2a8)
> [   19.108751]  r5:ed042c80 r4:00000018
> [   19.108771] [<c04fa694>] (drm_atomic_helper_commit_planes) from
> [<bf0a81a4>] (imx_drm_atomic_commit_tail+0x30/0x144 [imxdrm])
> [   19.108783]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
> r6:ed042c80 r5:bf0ab088
> [   19.108791]  r4:ed042c80
> [   19.108814] [<bf0a8174>] (imx_drm_atomic_commit_tail [imxdrm]) from
> [<c04feb1c>] (commit_tail+0x48/0x8c)
> [   19.108826]  r10:000000ab r9:00000000 r8:edc2b018 r7:edc2f000
> r6:00000000 r5:bf0ab088
> [   19.108834]  r4:ed042c80 r3:bf0a8174
> [   19.108846] [<c04fead4>] (commit_tail) from [<c04fecb8>]
> (drm_atomic_helper_commit+0x140/0x148)
> [   19.108854]  r5:00000000 r4:ed042c80
> [   19.108871] [<c04feb78>] (drm_atomic_helper_commit) from
> [<c051c138>] (drm_atomic_commit+0x54/0x60)
> [   19.108881]  r7:00000000 r6:edc2f000 r5:ed042c80 r4:00000000
> [   19.108895] [<c051c0e4>] (drm_atomic_commit) from [<c051d2fc>]
> (drm_atomic_connector_commit_dpms+0xf0/0x100)
> [   19.108904]  r7:00000000 r6:edc2c010 r5:ed042c80 r4:00000001
> [   19.108917] [<c051d20c>] (drm_atomic_connector_commit_dpms) from
> [<c0522a64>] (drm_mode_obj_set_property_ioctl+0x1b4/0x2ac)
> [   19.108928]  r9:ed042c80 r8:00000000 r7:00000000 r6:ed059d78
> r5:edc2c024 r4:edd76980
> [   19.108942] [<c05228b0>] (drm_mode_obj_set_property_ioctl) from
> [<c0521378>] (drm_mode_connector_property_set_ioctl+0x40/0x48)
> [   19.108954]  r10:000000ab r9:c01064ab r8:ed059e60 r7:c0521338
> r6:edc2f000 r5:00000000
> [   19.108961]  r4:00000000
> [   19.108976] [<c0521338>] (drm_mode_connector_property_set_ioctl)
> from [<c050a7e0>] (drm_ioctl_kernel+0x70/0xb0)
> [   19.108985]  r5:ed43b200 r4:0000001a
> [   19.108996] [<c050a770>] (drm_ioctl_kernel) from [<c050ac78>]
> (drm_ioctl+0x2a4/0x3ac)
> [   19.109007]  r9:c01064ab r8:ed43b200 r7:ed059e60 r6:c0b45b9c
> r5:00000010 r4:00000010
> [   19.109022] [<c050a9d4>] (drm_ioctl) from [<c023eab8>]
> (do_vfs_ioctl+0xac/0xa2c)
> [   19.109034]  r10:00000000 r9:ed058000 r8:0000000b r7:c023f474
> r6:edee9b80 r5:ed759f28
> [   19.109041]  r4:bea33bb0
> [   19.109052] [<c023ea0c>] (do_vfs_ioctl) from [<c023f474>]
> (SyS_ioctl+0x3c/0x64)
> [   19.109063]  r10:00000000 r9:ed058000 r8:bea33bb0 r7:c01064ab
> r6:edee9b80 r5:0000000b
> [   19.109070]  r4:edee9b80
> [   19.109085] [<c023f438>] (SyS_ioctl) from [<c0108be0>]
> (ret_fast_syscall+0x0/0x28)
> [   19.109097]  r9:ed058000 r8:c0108da4 r7:00000036 r6:c01064ab
> r5:bea33bb0 r4:00000000
> [   19.109104] ---[ end trace 3e19c988c4369e28 ]---
>
> On Thu, Nov 9, 2017 at 12:12 PM, Jani Nikula
> <jani.nikula@linux.intel.com> wrote:
>> On Thu, 09 Nov 2017, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
>>> I've just applied the referred individual patch to kernel-4.14-rc5 and
>>> the EDID isn't loaded. dw-hdmi gets no firmware at all.
>>
>> Sorry, I didn't mean you could just cherry-pick that one commit and make
>> it work. There were a number of preparatory patches before that, and I
>> think some cleanups on top.
>>
>> Please try drm-next to make sure you have it all.
>>
>> We didn't intend for the commits to be backported, instead we very much
>> wanted them to get a gradually increasing amount of exposure first to
>> make sure we don't break stuff.
>>
>> And as I said elsewhere in the thread, Russell's patch may be relevant
>> for current Linus' master and stable. We just need to reconciliate how
>> the two things should work together in drm-next and v4.15 and on.
>>
>> BR,
>> Jani.
>>
>> --
>> Jani Nikula, Intel Open Source Technology Center

-- 
Jani Nikula, Intel Open Source Technology Center

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Russell King - ARM Linux]

On Thu, Nov 09, 2017 at 05:01:35PM +0200, Jani Nikula wrote:
> On Thu, 09 Nov 2017, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
> > Hi Jani,
> >
> > I tried:
> > git clone git://people.freedesktop.org/~airlied/linux -b drm-next
> > --depth=1 --single-branch
> >
> > I got this:
> > EDID isn't loaded from file
> >
> > # cat /proc/cmdline
> > console=ttymxc0,115200 root=/dev/sda2 rw video=HDMI-A-1:1920x1080M at 60
> > drm.edid_firmware=edid/ktc_edid.bin dw_hdmi.dyndbg=+pfl cma=128M
> 
> Please try adding D at the end of your video= parameter to force
> connector on. Otherwise it'll do a ddc probe which apparently fails with
> your display.

I do hope you're not converting dw-hdmi to use DDC probing and having it
ignore the hotplug signal.  dw-hdmi has to work with AV setups, which
include an AV receiver, and that includes the AV receiver modifying the
HDMI data when:

(a) the TV is turned off or on.
(b) the AV receiver is placed into or out of standby

and it informs sources by pulsing the HDMI HPD signal, as per the HDMI
specification.  Proving the presence of DDC as a means of detection
won't pick up on these changes, and will cause a regression in the
driver.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
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[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Luís Mendes]

I've verified that dw_hdmi tracks when there is a monitor connected or
not and reacts to it, there are logs that are generated when the
TV/Monitor goes into standby and this is true even if DDC cannot be
read.
My original problem is that if the EDID data cannot be read then
dw_hdmi will enter DVI mode confiuration, with which I cannot get
sound, other than that the driver works properly.

On Thu, Nov 9, 2017 at 4:28 PM, Russell King - ARM Linux
<linux@armlinux.org.uk> wrote:
> On Thu, Nov 09, 2017 at 05:01:35PM +0200, Jani Nikula wrote:
>> On Thu, 09 Nov 2017, Lu?s Mendes <luis.p.mendes@gmail.com> wrote:
>> > Hi Jani,
>> >
>> > I tried:
>> > git clone git://people.freedesktop.org/~airlied/linux -b drm-next
>> > --depth=1 --single-branch
>> >
>> > I got this:
>> > EDID isn't loaded from file
>> >
>> > # cat /proc/cmdline
>> > console=ttymxc0,115200 root=/dev/sda2 rw video=HDMI-A-1:1920x1080M at 60
>> > drm.edid_firmware=edid/ktc_edid.bin dw_hdmi.dyndbg=+pfl cma=128M
>>
>> Please try adding D at the end of your video= parameter to force
>> connector on. Otherwise it'll do a ddc probe which apparently fails with
>> your display.
>
> I do hope you're not converting dw-hdmi to use DDC probing and having it
> ignore the hotplug signal.  dw-hdmi has to work with AV setups, which
> include an AV receiver, and that includes the AV receiver modifying the
> HDMI data when:
>
> (a) the TV is turned off or on.
> (b) the AV receiver is placed into or out of standby
>
> and it informs sources by pulsing the HDMI HPD signal, as per the HDMI
> specification.  Proving the presence of DDC as a means of detection
> won't pick up on these changes, and will cause a regression in the
> driver.
>
> --
> RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
> FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
> According to speedtest.net: 8.21Mbps down 510kbps up

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Russell King - ARM Linux]

On Thu, Nov 09, 2017 at 02:12:45PM +0200, Jani Nikula wrote:
> And as I said elsewhere in the thread, Russell's patch may be relevant
> for current Linus' master and stable. We just need to reconciliate how
> the two things should work together in drm-next and v4.15 and on.

Exactly, the patch is intended for current kernels.  The hint is that
(a) it's a bug fix, (b) it says "fix" in the title, and (c) it has the
stable attributation which says "apply me to previous kernels".

Daniel's response effectively says "no, we're not going to accept the
patch, work on a fix with some development code."

So, unless someone wants to tell me that it's acceptable to develop bug
fixes against Linus' tree _for_ Linus' tree and accept this patch, or
show some other solution that can be applied to Linus' current tree and
backported to stable trees, I'm just not going to bother in future -
someone else can end up doing the work.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
According to speedtest.net: 8.21Mbps down 510kbps up

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Jani Nikula]

On Thu, 09 Nov 2017, Russell King - ARM Linux <linux@armlinux.org.uk> wrote:
> On Thu, Nov 09, 2017 at 02:12:45PM +0200, Jani Nikula wrote:
>> And as I said elsewhere in the thread, Russell's patch may be relevant
>> for current Linus' master and stable. We just need to reconciliate how
>> the two things should work together in drm-next and v4.15 and on.
>
> Exactly, the patch is intended for current kernels.  The hint is that
> (a) it's a bug fix, (b) it says "fix" in the title, and (c) it has the
> stable attributation which says "apply me to previous kernels".
>
> Daniel's response effectively says "no, we're not going to accept the
> patch, work on a fix with some development code."

Please don't turn a technical discussion into an unnecessary
altercation. Focusing on finding the best solution instead would be much
appreciated.

> So, unless someone wants to tell me that it's acceptable to develop bug
> fixes against Linus' tree _for_ Linus' tree and accept this patch, or
> show some other solution that can be applied to Linus' current tree and
> backported to stable trees, I'm just not going to bother in future -
> someone else can end up doing the work.

I also don't want non-regression fixes merged to Linus' tree if they're
known to regress much wider impact work queued to Linus' tree for the
next merge window. And it's not just some development code, it's been in
drm-next and linux-next for more than 1? months now. So I want to figure
this out first.

Lu?s, can you try try drm-next *with* Russell's patch, please?


BR,
Jani.

-- 
Jani Nikula, Intel Open Source Technology Center

[PATCH] drm/bridge: dw-hdmi: fix EDID parsing

[Jani Nikula]

On Tue, 07 Nov 2017, Russell King <rmk+kernel@armlinux.org.uk> wrote:
> Parsing the EDID for HDMI and audio information in the get_modes()
> callback is incorrect - this only parses the EDID read from the
> connector, not any override or firmware provided EDID.
>
> The correct place to parse the EDID for these parameters is the
> fill_modes() callback, after we've called the helper.  Move the parsing
> there.  This caused problems for Lu?s Mendes.
>
> Cc: <stable@vger.kernel.org>
> Reported-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> Tested-by: Lu?s Mendes <luis.p.mendes@gmail.com>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

Is this still needed after 53fd40a90f3c ("drm: handle override and
firmware EDID at drm_do_get_edid() level") that is headed for v4.15? I'm
thinking this might be applicable only for current Linus master and
stable.

BR,
Jani.


> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28 ++++++++++++++++++++++++----
>  1 file changed, 24 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 9fe407f49986..2516a1c18a10 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1905,10 +1905,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
>  			edid->width_cm, edid->height_cm);
>  
> -		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> -		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
>  		drm_mode_connector_update_edid_property(connector, edid);
> -		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
>  		ret = drm_add_edid_modes(connector, edid);
>  		/* Store the ELD */
>  		drm_edid_to_eld(connector, edid);
> @@ -1920,6 +1917,29 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  	return ret;
>  }
>  
> +static int dw_hdmi_connector_fill_modes(struct drm_connector *connector,
> +					uint32_t maxX, uint32_t maxY)
> +{
> +	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> +					    connector);
> +	int ret;
> +
> +	ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
> +
> +	if (connector->edid_blob_ptr) {
> +		struct edid *edid = (void *)connector->edid_blob_ptr->data;
> +
> +		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
> +		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
> +		cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
> +	} else {
> +		hdmi->sink_is_hdmi = false;
> +		hdmi->sink_has_audio = false;
> +	}
> +
> +	return ret;
> +}
> +
>  static void dw_hdmi_connector_force(struct drm_connector *connector)
>  {
>  	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> @@ -1933,7 +1953,7 @@ static void dw_hdmi_connector_force(struct drm_connector *connector)
>  }
>  
>  static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
> -	.fill_modes = drm_helper_probe_single_connector_modes,
> +	.fill_modes = dw_hdmi_connector_fill_modes,
>  	.detect = dw_hdmi_connector_detect,
>  	.destroy = drm_connector_cleanup,
>  	.force = dw_hdmi_connector_force,

-- 
Jani Nikula, Intel Open Source Technology Center