[PATCH RFC 0/3] Pass pipe to LPE audio

[PATCH RFC 0/3] Pass pipe to LPE audio

[Takashi Iwai]

Hi,

this is a patch series to pass the pipe over LPE audio notification,
based on Pierre's latest patchset ("[RFC PATCH 0/5] DisplayPort Audio
on Cherrytrail").


Takashi

===

Takashi Iwai (3):
  drm/i915: Avoid MST pipe handling for LPE audio
  drm/i915: Pass pipe to LPE audio notification
  ALSA: x86: Use config base depending on the pipe

 drivers/gpu/drm/i915/i915_drv.h        |  2 +-
 drivers/gpu/drm/i915/intel_audio.c     | 27 ++++++++++++++-------------
 drivers/gpu/drm/i915/intel_lpe_audio.c |  3 ++-
 include/drm/intel_lpe_audio.h          |  1 +
 sound/x86/intel_hdmi_lpe_audio.c       | 32 +++++++++++++++++++++-----------
 5 files changed, 39 insertions(+), 26 deletions(-)

-- 
2.11.0

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[PATCH RFC 1/3] drm/i915: Avoid MST pipe handling for LPE audio

[Takashi Iwai]

The pipe gets cleared to -1 for non-MST before the ELD audio
notification due to the MST audio support.  This makes sense for
HD-audio that received the MST handling, but it's useless for LPE
audio.  Handle the MST pipe hack conditionally only for HD-audio.

Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/gpu/drm/i915/intel_audio.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 1645ce42b898..d4e6d1136cfe 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -624,13 +624,14 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder,
 	dev_priv->av_enc_map[pipe] = intel_encoder;
 	mutex_unlock(&dev_priv->av_mutex);
 
-	/* audio drivers expect pipe = -1 to indicate Non-MST cases */
-	if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
-		pipe = -1;
-
-	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
+	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) {
+		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
+		if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
+			pipe = -1;
 		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
 						 (int) port, (int) pipe);
+	}
+
 	switch (intel_encoder->type) {
 	case INTEL_OUTPUT_HDMI:
 		intel_lpe_audio_notify(dev_priv, connector->eld, port,
@@ -671,13 +672,13 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
 	dev_priv->av_enc_map[pipe] = NULL;
 	mutex_unlock(&dev_priv->av_mutex);
 
-	/* audio drivers expect pipe = -1 to indicate Non-MST cases */
-	if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
-		pipe = -1;
-
-	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
+	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) {
+		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
+		if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
+			pipe = -1;
 		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
 						 (int) port, (int) pipe);
+	}
 
 	intel_lpe_audio_notify(dev_priv, NULL, port, 0, false, 0);
 }
-- 
2.11.0

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Re: [alsa-devel] [PATCH RFC 1/3] drm/i915: Avoid MST pipe handling for LPE audio

[Pierre-Louis Bossart]

On 01/27/2017 04:36 AM, Takashi Iwai wrote:
> The pipe gets cleared to -1 for non-MST before the ELD audio
> notification due to the MST audio support.  This makes sense for
> HD-audio that received the MST handling, but it's useless for LPE
> audio.  Handle the MST pipe hack conditionally only for HD-audio.
>
> Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
> ---
>   drivers/gpu/drm/i915/intel_audio.c | 21 +++++++++++----------
>   1 file changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> index 1645ce42b898..d4e6d1136cfe 100644
> --- a/drivers/gpu/drm/i915/intel_audio.c
> +++ b/drivers/gpu/drm/i915/intel_audio.c
> @@ -624,13 +624,14 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder,
>   	dev_priv->av_enc_map[pipe] = intel_encoder;
>   	mutex_unlock(&dev_priv->av_mutex);
>   
> -	/* audio drivers expect pipe = -1 to indicate Non-MST cases */
> -	if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
> -		pipe = -1;
> -
> -	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
> +	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) {
> +		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
> +		if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
> +			pipe = -1;
>   		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
>   						 (int) port, (int) pipe);
> +	}
> +
Cool. I missed this part, couldn't figure out where the -1 was coming from.
So do you get audio working on both of the DP ports now?
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Re: [alsa-devel] [PATCH RFC 1/3] drm/i915: Avoid MST pipe handling for LPE audio

[Takashi Iwai]

On Fri, 27 Jan 2017 15:15:14 +0100,
Pierre-Louis Bossart wrote:
> 
> 
> 
> On 01/27/2017 04:36 AM, Takashi Iwai wrote:
> > The pipe gets cleared to -1 for non-MST before the ELD audio
> > notification due to the MST audio support.  This makes sense for
> > HD-audio that received the MST handling, but it's useless for LPE
> > audio.  Handle the MST pipe hack conditionally only for HD-audio.
> >
> > Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> > Signed-off-by: Takashi Iwai <tiwai@suse.de>
> > ---
> >   drivers/gpu/drm/i915/intel_audio.c | 21 +++++++++++----------
> >   1 file changed, 11 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> > index 1645ce42b898..d4e6d1136cfe 100644
> > --- a/drivers/gpu/drm/i915/intel_audio.c
> > +++ b/drivers/gpu/drm/i915/intel_audio.c
> > @@ -624,13 +624,14 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder,
> >   	dev_priv->av_enc_map[pipe] = intel_encoder;
> >   	mutex_unlock(&dev_priv->av_mutex);
> >   -	/* audio drivers expect pipe = -1 to indicate Non-MST cases */
> > -	if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
> > -		pipe = -1;
> > -
> > -	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
> > +	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) {
> > +		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
> > +		if (intel_encoder->type != INTEL_OUTPUT_DP_MST)
> > +			pipe = -1;
> >   		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
> >   						 (int) port, (int) pipe);
> > +	}
> > +
> Cool. I missed this part, couldn't figure out where the -1 was coming from.
> So do you get audio working on both of the DP ports now?

DP1 is working now.
DP3 starts streaming, but no audio came out yet :-<


Takashi
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[PATCH RFC 2/3] drm/i915: Pass pipe to LPE audio notification

[Takashi Iwai]

The LPE audio configuration depends on the pipe, thus we need to pass
the currently used pipe.  It's now embedded in struct
intel_hdmi_lpe_audio_eld as well as port id.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/gpu/drm/i915/i915_drv.h        | 2 +-
 drivers/gpu/drm/i915/intel_audio.c     | 6 +++---
 drivers/gpu/drm/i915/intel_lpe_audio.c | 3 ++-
 include/drm/intel_lpe_audio.h          | 1 +
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1c7aa8fcd0fa..1c56c5832735 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3400,7 +3400,7 @@ int  intel_lpe_audio_init(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_irq_handler(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
-			    void *eld, int port, int tmds_clk_speed,
+			    void *eld, int port, int pipe, int tmds_clk_speed,
 			    bool dp_output, int link_rate);
 
 /* intel_i2c.c */
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index d4e6d1136cfe..892169b7952b 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -634,12 +634,12 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder,
 
 	switch (intel_encoder->type) {
 	case INTEL_OUTPUT_HDMI:
-		intel_lpe_audio_notify(dev_priv, connector->eld, port,
+		intel_lpe_audio_notify(dev_priv, connector->eld, port, pipe,
 				       crtc_state->port_clock,
 				       false, 0);
 		break;
 	case INTEL_OUTPUT_DP:
-		intel_lpe_audio_notify(dev_priv, connector->eld, port,
+		intel_lpe_audio_notify(dev_priv, connector->eld, port, pipe,
 				       adjusted_mode->crtc_clock,
 				       true, crtc_state->port_clock);
 		break;
@@ -680,7 +680,7 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
 						 (int) port, (int) pipe);
 	}
 
-	intel_lpe_audio_notify(dev_priv, NULL, port, 0, false, 0);
+	intel_lpe_audio_notify(dev_priv, NULL, port, pipe, 0, false, 0);
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/intel_lpe_audio.c b/drivers/gpu/drm/i915/intel_lpe_audio.c
index b3134efdcf82..62bc3c6456e4 100644
--- a/drivers/gpu/drm/i915/intel_lpe_audio.c
+++ b/drivers/gpu/drm/i915/intel_lpe_audio.c
@@ -341,7 +341,7 @@ void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv)
  * Notify lpe audio driver of eld change.
  */
 void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
-			    void *eld, int port, int tmds_clk_speed,
+			    void *eld, int port, int pipe, int tmds_clk_speed,
 			    bool dp_output, int link_rate)
 {
 	unsigned long irq_flags;
@@ -359,6 +359,7 @@ void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
 		memcpy(pdata->eld.eld_data, eld,
 			HDMI_MAX_ELD_BYTES);
 		pdata->eld.port_id = port;
+		pdata->eld.pipe_id = pipe;
 		pdata->hdmi_connected = true;
 
 		pdata->dp_output = dp_output;
diff --git a/include/drm/intel_lpe_audio.h b/include/drm/intel_lpe_audio.h
index 857e0eafed79..410128e4cd70 100644
--- a/include/drm/intel_lpe_audio.h
+++ b/include/drm/intel_lpe_audio.h
@@ -31,6 +31,7 @@
 
 struct intel_hdmi_lpe_audio_eld {
 	int port_id;
+	int pipe_id;
 	unsigned char eld_data[HDMI_MAX_ELD_BYTES];
 };
 
-- 
2.11.0

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[PATCH RFC 3/3] ALSA: x86: Use config base depending on the pipe

[Takashi Iwai]

Now the pipe that is being used is passed over i915 notification, we
can re-setup the had_config_offset depending on it at the hotplug.
This allows, at least, the stream transfer on the second DP working on
Dell Wyse 3040 box here (although it's still not audible by other
reasons).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/x86/intel_hdmi_lpe_audio.c | 32 +++++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 11 deletions(-)

diff --git a/sound/x86/intel_hdmi_lpe_audio.c b/sound/x86/intel_hdmi_lpe_audio.c
index 23e5b34dcf41..55bc2cfd21c4 100644
--- a/sound/x86/intel_hdmi_lpe_audio.c
+++ b/sound/x86/intel_hdmi_lpe_audio.c
@@ -463,6 +463,22 @@ static void notify_audio_lpe(void *audio_ptr)
 
 	} else if (eld != NULL) {
 
+		switch (eld->pipe_id) {
+		case 0:
+			ctx->had_config_offset = AUDIO_HDMI_CONFIG_A;
+			break;
+		case 1:
+			ctx->had_config_offset = AUDIO_HDMI_CONFIG_B;
+			break;
+		case 2:
+			ctx->had_config_offset = AUDIO_HDMI_CONFIG_C;
+			break;
+		default:
+			dev_dbg(&hlpe_pdev->dev, "Invalid pipe %d\n",
+				eld->pipe_id);
+			break;
+		}
+
 		hdmi_set_eld(eld->eld_data);
 
 		mid_hdmi_audio_signal_event(HAD_EVENT_HOT_PLUG);
@@ -560,21 +576,15 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
 	ctx->mmio_start = mmio_start;
 	ctx->tmds_clock_speed = DIS_SAMPLE_RATE_148_5;
 
-	if (pci_dev_present(cherryview_ids)) {
+	if (pci_dev_present(cherryview_ids))
 		dev_dbg(&hlpe_pdev->dev, "%s: Cherrytrail LPE - Detected\n",
 				__func__);
-		//ctx->had_config_offset = AUDIO_HDMI_CONFIG_C;
-		/* FIXME: hard-coding to CONFIG_A enables DP audio on CHT,
-		 *  how do I find out which config to use ?
-		 * the pipe is -1 (invalid) when the notify function is called,
-		 * so not sure how to go about this
-		 */
-		ctx->had_config_offset = AUDIO_HDMI_CONFIG_A;
-	} else {
+	else
 		dev_dbg(&hlpe_pdev->dev, "%s: Baytrail LPE - Assume\n",
 				__func__);
-		ctx->had_config_offset = AUDIO_HDMI_CONFIG_A;
-	}
+
+	/* assume pipe A as default */
+	ctx->had_config_offset = AUDIO_HDMI_CONFIG_A;
 
 	pdata = pdev->dev.platform_data;
 
-- 
2.11.0

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