[PATCH 0/3] Minor i915_dp_mst_info output enhancements

[PATCH 0/3] Minor i915_dp_mst_info output enhancements

[Jim Bride]

While writing a utility that parses information from the debugfs file
i915_dp_mst_info and formats it in a more easily human-readable fashion,
I noticed a few things missing from the debug output that would be nice to
have.  Most notably, there was not an easy way to associate a particular
sink device with a virtual channel in an obvious way.  While I was testing
my changes I discovered that my MST branch device actually has a '\0'
embedded in its devid info that was wreaking havoc with my string parsing
so I prevented that character from being written to debugfs.

Jim Bride (3):
  drm/edid: Add drm_edid_get_monitor_name()
  drm/dp/mst: Enhance DP MST debugfs output
  drm/i915/dp/mst: Add source port info to debugfs output

 drivers/gpu/drm/drm_dp_mst_topology.c | 35 ++++++++++++++++++++++++++++++-----
 drivers/gpu/drm/drm_edid.c            | 28 ++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_debugfs.c   |  3 ++-
 include/drm/drm_crtc.h                |  1 +
 4 files changed, 61 insertions(+), 6 deletions(-)

-- 
2.5.0

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[PATCH 1/3] drm/edid: Add drm_edid_get_monitor_name()

[Jim Bride]

In order to include monitor name information in debugfs
output we needed to add a function that would extract the
monitor name from the EDID, and that function needed to
reside in the file  where the rest of the EDID helper
functions are implemented.

cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/drm_edid.c | 28 ++++++++++++++++++++++++++++
 include/drm/drm_crtc.h     |  1 +
 2 files changed, 29 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 558ef9f..fc69a46 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3569,6 +3569,34 @@ struct drm_connector *drm_select_eld(struct drm_encoder *encoder)
 EXPORT_SYMBOL(drm_select_eld);
 
 /**
+ * drm_edid_get_monitor_name - fetch the monitor name from the edid
+ * @edid: monitor EDID information
+ * @name: pointer to a character array of at least 13 chars to hold the name
+ *
+ * Return: True if the name could be extracted, false otherwise
+ */
+bool drm_edid_get_monitor_name(struct edid *edid, char *name)
+{
+	char *edid_name = NULL;
+	int mnl;
+
+	if (!edid || !name)
+		return false;
+
+	drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
+	for (mnl = 0; edid_name && mnl < 13; mnl++) {
+		if (edid_name[mnl] == 0x0a) {
+			name[mnl] = '\0';
+			break;
+		}
+		name[mnl] = edid_name[mnl];
+	}
+
+	return mnl ? true : false;
+}
+EXPORT_SYMBOL(drm_edid_get_monitor_name);
+
+/**
  * drm_detect_hdmi_monitor - detect whether monitor is HDMI
  * @edid: monitor EDID information
  *
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 8cb377c..2590168 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -2500,6 +2500,7 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid);
 extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
 				 bool *edid_corrupt);
 extern bool drm_edid_is_valid(struct edid *edid);
+extern bool drm_edid_get_monitor_name(struct edid *edid, char *name);
 
 extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
 							 char topology[8]);
-- 
2.5.0

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Re: [PATCH 1/3] drm/edid: Add drm_edid_get_monitor_name()

[Jani Nikula]

On Tue, 05 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> In order to include monitor name information in debugfs
> output we needed to add a function that would extract the
> monitor name from the EDID, and that function needed to
> reside in the file  where the rest of the EDID helper
> functions are implemented.
>
> cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
> ---
>  drivers/gpu/drm/drm_edid.c | 28 ++++++++++++++++++++++++++++
>  include/drm/drm_crtc.h     |  1 +
>  2 files changed, 29 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 558ef9f..fc69a46 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3569,6 +3569,34 @@ struct drm_connector *drm_select_eld(struct drm_encoder *encoder)
>  EXPORT_SYMBOL(drm_select_eld);
>  
>  /**
> + * drm_edid_get_monitor_name - fetch the monitor name from the edid
> + * @edid: monitor EDID information
> + * @name: pointer to a character array of at least 13 chars to hold the name

Mixed feelings about "at least 13 chars". It might be simpler for this
one thing, but I hate to see this assumption of "at least 13 chars" get
spread around in patch 2 to where it's no longer obvious where this
requirement comes from.

Seeing that this is mostly copy-paste from drm_edid_to_eld(), I think
this patch should be an abstraction of that code to a separate function.

> + *
> + * Return: True if the name could be extracted, false otherwise
> + */
> +bool drm_edid_get_monitor_name(struct edid *edid, char *name)
> +{
> +	char *edid_name = NULL;
> +	int mnl;
> +
> +	if (!edid || !name)
> +		return false;
> +
> +	drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
> +	for (mnl = 0; edid_name && mnl < 13; mnl++) {
> +		if (edid_name[mnl] == 0x0a) {
> +			name[mnl] = '\0';

Depending on edid_name you might not terminate the string. And, in fact,
if you make this an abstraction for drm_edid_to_eld(), you might be
better off *not* terminating, which OTOH is not nice for your other use
in patch 2.

So how about first adding an internal abstraction:

static int get_monitor_name(struct edid *edid, char name[13])

which does *not* terminate the string, and returns length, 0 for
edid_name == NULL. Works nicely for drm_edid_to_eld().

Then you could add the external interface on top of that:

static void drm_edid_get_monitor_name(struct edid *edid, char *buf, int bufsize)

which would always terminate the string (assuming bufsize > 0), even on
errors so you can get rid of the return value. This simplifies your
follow up code, and if we later on need more robust error handling, it's
easy to add the return value.

BR,
Jani.


> +			break;
> +		}
> +		name[mnl] = edid_name[mnl];
> +	}
> +
> +	return mnl ? true : false;
> +}
> +EXPORT_SYMBOL(drm_edid_get_monitor_name);
> +
> +/**
>   * drm_detect_hdmi_monitor - detect whether monitor is HDMI
>   * @edid: monitor EDID information
>   *
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 8cb377c..2590168 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -2500,6 +2500,7 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid);
>  extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
>  				 bool *edid_corrupt);
>  extern bool drm_edid_is_valid(struct edid *edid);
> +extern bool drm_edid_get_monitor_name(struct edid *edid, char *name);
>  
>  extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
>  							 char topology[8]);

-- 
Jani Nikula, Intel Open Source Technology Center
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Re: [PATCH 1/3] drm/edid: Add drm_edid_get_monitor_name()

[Jim Bride]

On Wed, Apr 06, 2016 at 11:35:44AM +0300, Jani Nikula wrote:
> On Tue, 05 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> > In order to include monitor name information in debugfs
> > output we needed to add a function that would extract the
> > monitor name from the EDID, and that function needed to
> > reside in the file  where the rest of the EDID helper
> > functions are implemented.
> >
> > cc: dri-devel@lists.freedesktop.org
> > Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
> > ---
> >  drivers/gpu/drm/drm_edid.c | 28 ++++++++++++++++++++++++++++
> >  include/drm/drm_crtc.h     |  1 +
> >  2 files changed, 29 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> > index 558ef9f..fc69a46 100644
> > --- a/drivers/gpu/drm/drm_edid.c
> > +++ b/drivers/gpu/drm/drm_edid.c
> > @@ -3569,6 +3569,34 @@ struct drm_connector *drm_select_eld(struct drm_encoder *encoder)
> >  EXPORT_SYMBOL(drm_select_eld);
> >  
> >  /**
> > + * drm_edid_get_monitor_name - fetch the monitor name from the edid
> > + * @edid: monitor EDID information
> > + * @name: pointer to a character array of at least 13 chars to hold the name
> 
> Mixed feelings about "at least 13 chars". It might be simpler for this
> one thing, but I hate to see this assumption of "at least 13 chars" get
> spread around in patch 2 to where it's no longer obvious where this
> requirement comes from.
> 
> Seeing that this is mostly copy-paste from drm_edid_to_eld(), I think
> this patch should be an abstraction of that code to a separate function.

Yeah, I see what you mean.  Writing something that works with both this
use and drm_edid_to_eld() for the name parsing makes sense.

> > + *
> > + * Return: True if the name could be extracted, false otherwise
> > + */
> > +bool drm_edid_get_monitor_name(struct edid *edid, char *name)
> > +{
> > +	char *edid_name = NULL;
> > +	int mnl;
> > +
> > +	if (!edid || !name)
> > +		return false;
> > +
> > +	drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
> > +	for (mnl = 0; edid_name && mnl < 13; mnl++) {
> > +		if (edid_name[mnl] == 0x0a) {
> > +			name[mnl] = '\0';
> 
> Depending on edid_name you might not terminate the string. And, in fact,
> if you make this an abstraction for drm_edid_to_eld(), you might be
> better off *not* terminating, which OTOH is not nice for your other use
> in patch 2.
> 
> So how about first adding an internal abstraction:
> 
> static int get_monitor_name(struct edid *edid, char name[13])
> 
> which does *not* terminate the string, and returns length, 0 for
> edid_name == NULL. Works nicely for drm_edid_to_eld().
> 
> Then you could add the external interface on top of that:
> 
> static void drm_edid_get_monitor_name(struct edid *edid, char *buf, int bufsize)
> 
> which would always terminate the string (assuming bufsize > 0), even on
> errors so you can get rid of the return value. This simplifies your
> follow up code, and if we later on need more robust error handling, it's
> easy to add the return value.

Seems reasonable; I'll update the patch.

Jim

> BR,
> Jani.
> 
> 
> > +			break;
> > +		}
> > +		name[mnl] = edid_name[mnl];
> > +	}
> > +
> > +	return mnl ? true : false;
> > +}
> > +EXPORT_SYMBOL(drm_edid_get_monitor_name);
> > +
> > +/**
> >   * drm_detect_hdmi_monitor - detect whether monitor is HDMI
> >   * @edid: monitor EDID information
> >   *
> > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> > index 8cb377c..2590168 100644
> > --- a/include/drm/drm_crtc.h
> > +++ b/include/drm/drm_crtc.h
> > @@ -2500,6 +2500,7 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid);
> >  extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
> >  				 bool *edid_corrupt);
> >  extern bool drm_edid_is_valid(struct edid *edid);
> > +extern bool drm_edid_get_monitor_name(struct edid *edid, char *name);
> >  
> >  extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
> >  							 char topology[8]);
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center
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[PATCH 2/3] drm/dp/mst: Enhance DP MST debugfs output

[Jim Bride]

Add some additional information (input vs. output port, sink associated
with VC, peer device type, max number of VCs supported) and ensure that
any embedded '\0' characters in a branch device's devid string are not
written to debugfs.

cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 27fbd79..1afa36d 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2729,7 +2729,7 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
 
 	seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports);
 	list_for_each_entry(port, &mstb->ports, next) {
-		seq_printf(m, "%sport: %d: ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
+		seq_printf(m, "%sport: %d: input: %d: pdt: %d, ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->input, port->pdt, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
 		if (port->mstb)
 			drm_dp_mst_dump_mstb(m, port->mstb);
 	}
@@ -2750,6 +2750,17 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
 	return false;
 }
 
+static bool fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr,
+			       struct drm_dp_mst_port *port, char *name)
+{
+	struct edid *mst_edid = NULL;
+
+	mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port);
+	if (mst_edid == NULL)
+		return false;
+	return drm_edid_get_monitor_name(mst_edid, name);
+}
+
 /**
  * drm_dp_mst_dump_topology(): dump topology to seq file.
  * @m: seq_file to dump output to
@@ -2762,6 +2773,8 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 {
 	int i;
 	struct drm_dp_mst_port *port;
+	bool mname_valid = false;
+
 	mutex_lock(&mgr->lock);
 	if (mgr->mst_primary)
 		drm_dp_mst_dump_mstb(m, mgr->mst_primary);
@@ -2770,14 +2783,22 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 	mutex_unlock(&mgr->lock);
 
 	mutex_lock(&mgr->payload_lock);
-	seq_printf(m, "vcpi: %lx %lx\n", mgr->payload_mask, mgr->vcpi_mask);
+	seq_printf(m, "vcpi: %lx %lx %d\n", mgr->payload_mask, mgr->vcpi_mask,
+		mgr->max_payloads);
 
 	for (i = 0; i < mgr->max_payloads; i++) {
 		if (mgr->proposed_vcpis[i]) {
+			char name[13];
+
+			memset(name, 0, 13 * sizeof(char));
 			port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi);
-			seq_printf(m, "vcpi %d: %d %d %d\n", i, port->port_num, port->vcpi.vcpi, port->vcpi.num_slots);
+			mname_valid = fetch_monitor_name(mgr, port, name);
+			seq_printf(m, "vcpi %d: %d %d %d sink name: %s\n", i,
+				   port->port_num, port->vcpi.vcpi,
+				   port->vcpi.num_slots, mname_valid ? name :
+				   "Unknown");
 		} else
-			seq_printf(m, "vcpi %d:unsed\n", i);
+			seq_printf(m, "vcpi %d:unused\n", i);
 	}
 	for (i = 0; i < mgr->max_payloads; i++) {
 		seq_printf(m, "payload %d: %d, %d, %d\n",
@@ -2818,7 +2839,11 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 			seq_printf(m, "%02x", buf[i]);
 		seq_printf(m, " devid: ");
 		for (i = 0x3; i < 0x8; i++)
-			seq_printf(m, "%c", buf[i]);
+			if (buf[i] != '\0')
+				seq_printf(m, "%c", buf[i]);
+			else
+				break;
+
 		seq_printf(m, " revision: hw: %x.%x sw: %x.%x", buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
 		seq_printf(m, "\n");
 		bret = dump_dp_payload_table(mgr, buf);
-- 
2.5.0

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[PATCH 3/3] drm/i915/dp/mst: Add source port info to debugfs output

[Jim Bride]

Modify the debugfs output for i915_dp_mst_info to list the source port for
the DP MST topology in question.

Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index a2e3af0..192f399 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3441,7 +3441,8 @@ static int i915_dp_mst_info(struct seq_file *m, void *unused)
 		intel_dig_port = enc_to_dig_port(encoder);
 		if (!intel_dig_port->dp.can_mst)
 			continue;
-
+		seq_printf(m, "MST Source Port %c\n",
+			   port_name(intel_dig_port->port));
 		drm_dp_mst_dump_topology(m, &intel_dig_port->dp.mst_mgr);
 	}
 	drm_modeset_unlock_all(dev);
-- 
2.5.0

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✗ Fi.CI.BAT: failure for Minor i915_dp_mst_info output enhancements

[Patchwork]

== Series Details ==

Series: Minor i915_dp_mst_info output enhancements
URL   : https://patchwork.freedesktop.org/series/5346/
State : failure

== Summary ==

Series 5346v1 Minor i915_dp_mst_info output enhancements
http://patchwork.freedesktop.org/api/1.0/series/5346/revisions/1/mbox/

Test gem_exec_whisper:
        Subgroup basic:
                pass       -> DMESG-FAIL (bsw-nuc-2)
Test gem_sync:
        Subgroup basic-all:
                dmesg-fail -> PASS       (bsw-nuc-2)
Test kms_flip:
        Subgroup basic-flip-vs-dpms:
                dmesg-warn -> PASS       (ilk-hp8440p) UNSTABLE
Test kms_force_connector_basic:
        Subgroup prune-stale-modes:
                skip       -> PASS       (ivb-t430s)
Test kms_pipe_crc_basic:
        Subgroup suspend-read-crc-pipe-c:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test pm_rpm:
        Subgroup basic-pci-d3-state:
                pass       -> DMESG-WARN (bsw-nuc-2)

bdw-nuci7        total:196  pass:184  dwarn:0   dfail:0   fail:0   skip:12 
bdw-ultra        total:196  pass:175  dwarn:0   dfail:0   fail:0   skip:21 
bsw-nuc-2        total:196  pass:157  dwarn:1   dfail:1   fail:0   skip:37 
byt-nuc          total:196  pass:161  dwarn:0   dfail:0   fail:0   skip:35 
hsw-brixbox      total:196  pass:174  dwarn:0   dfail:0   fail:0   skip:22 
hsw-gt2          total:196  pass:179  dwarn:0   dfail:0   fail:0   skip:17 
ilk-hp8440p      total:196  pass:132  dwarn:0   dfail:0   fail:0   skip:64 
ivb-t430s        total:196  pass:171  dwarn:0   dfail:0   fail:0   skip:25 
skl-i7k-2        total:196  pass:173  dwarn:0   dfail:0   fail:0   skip:23 
skl-nuci5        total:196  pass:185  dwarn:0   dfail:0   fail:0   skip:11 
snb-dellxps      total:196  pass:162  dwarn:0   dfail:0   fail:0   skip:34 
snb-x220t        total:196  pass:162  dwarn:0   dfail:0   fail:1   skip:33 

Results at /archive/results/CI_IGT_test/Patchwork_1810/

12899f13b8ee9a4944f167a08e4db0526a3f3855 drm-intel-nightly: 2016y-04m-05d-19h-09m-25s UTC integration manifest
a5435ff1460a2481b2823c0100e3e000586cfec7 drm/i915/dp/mst: Add source port info to debugfs output
6fb45c2516d4b14be82a00421e2b37c2061f0ee0 drm/dp/mst: Enhance DP MST debugfs output
d632f7a2a3e20fc4751cb245ea934ba40e8ddbb1 drm/edid: Add drm_edid_get_monitor_name()

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[PATCH v2 1/3] drm/edid: Add drm_edid_get_monitor_name()

[Jim Bride]

In order to include monitor name information in debugfs
output we needed to add a function that would extract the
monitor name from the EDID, and that function needed to
reside in the file  where the rest of the EDID helper
functions are implemented.

v2: Refactor to have drm_edid_get_monitor_name() and drm_edid_to_eld()
    use a common helper function to extract the monitor name from the
    edid. [Jani] + rebase.

cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/drm_edid.c | 50 +++++++++++++++++++++++++++++++++++++---------
 include/drm/drm_crtc.h     |  2 ++
 2 files changed, 43 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 558ef9f..daf53df 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3293,6 +3293,45 @@ monitor_name(struct detailed_timing *t, void *data)
 		*(u8 **)data = t->data.other_data.data.str.str;
 }
 
+static int get_monitor_name(struct edid *edid, char name[13])
+{
+	char *edid_name = NULL;
+	int mnl;
+
+	if (!edid || !name)
+		return 0;
+
+	drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
+	for (mnl = 0; edid_name && mnl < 13; mnl++) {
+		if (edid_name[mnl] == 0x0a)
+			break;
+
+		name[mnl] = edid_name[mnl];
+	}
+
+	return mnl;
+}
+
+/**
+ * drm_edid_get_monitor_name - fetch the monitor name from the edid
+ * @edid: monitor EDID information
+ * @name: pointer to a character array to hold the name of the monitor
+ * @bufsize: The size of the name buffer (should be at least 13 chars.)
+ *
+ */
+void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize)
+{
+	int name_length = -1;
+
+	if (bufsize < 13)
+		return;
+
+	name_length = get_monitor_name(edid, name);
+	if (name_length)
+		name[name_length] = '\0';
+}
+EXPORT_SYMBOL(drm_edid_get_monitor_name);
+
 /**
  * drm_edid_to_eld - build ELD from EDID
  * @connector: connector corresponding to the HDMI/DP sink
@@ -3306,7 +3345,6 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
 {
 	uint8_t *eld = connector->eld;
 	u8 *cea;
-	u8 *name;
 	u8 *db;
 	int total_sad_count = 0;
 	int mnl;
@@ -3320,14 +3358,8 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
 		return;
 	}
 
-	name = NULL;
-	drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
-	/* max: 13 bytes EDID, 16 bytes ELD */
-	for (mnl = 0; name && mnl < 13; mnl++) {
-		if (name[mnl] == 0x0a)
-			break;
-		eld[20 + mnl] = name[mnl];
-	}
+	mnl = get_monitor_name(edid, eld + 20);
+
 	eld[4] = (cea[1] << 5) | mnl;
 	DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
 
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 8cb377c..6d46842 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -2500,6 +2500,8 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid);
 extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
 				 bool *edid_corrupt);
 extern bool drm_edid_is_valid(struct edid *edid);
+extern void drm_edid_get_monitor_name(struct edid *edid, char *name,
+				      int buflen);
 
 extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
 							 char topology[8]);
-- 
2.5.0

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Re: [Intel-gfx] [PATCH v2 1/3] drm/edid: Add drm_edid_get_monitor_name()

[Jani Nikula]

On Thu, 07 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> In order to include monitor name information in debugfs
> output we needed to add a function that would extract the
> monitor name from the EDID, and that function needed to
> reside in the file  where the rest of the EDID helper
> functions are implemented.
>
> v2: Refactor to have drm_edid_get_monitor_name() and drm_edid_to_eld()
>     use a common helper function to extract the monitor name from the
>     edid. [Jani] + rebase.
>
> cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
> ---
>  drivers/gpu/drm/drm_edid.c | 50 +++++++++++++++++++++++++++++++++++++---------
>  include/drm/drm_crtc.h     |  2 ++
>  2 files changed, 43 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 558ef9f..daf53df 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3293,6 +3293,45 @@ monitor_name(struct detailed_timing *t, void *data)
>  		*(u8 **)data = t->data.other_data.data.str.str;
>  }
>  
> +static int get_monitor_name(struct edid *edid, char name[13])
> +{
> +	char *edid_name = NULL;
> +	int mnl;
> +
> +	if (!edid || !name)
> +		return 0;
> +
> +	drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
> +	for (mnl = 0; edid_name && mnl < 13; mnl++) {
> +		if (edid_name[mnl] == 0x0a)
> +			break;
> +
> +		name[mnl] = edid_name[mnl];
> +	}
> +
> +	return mnl;
> +}
> +
> +/**
> + * drm_edid_get_monitor_name - fetch the monitor name from the edid
> + * @edid: monitor EDID information
> + * @name: pointer to a character array to hold the name of the monitor
> + * @bufsize: The size of the name buffer (should be at least 13 chars.)
> + *
> + */
> +void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize)
> +{
> +	int name_length = -1;
> +
> +	if (bufsize < 13)
> +		return;
> +
> +	name_length = get_monitor_name(edid, name);
> +	if (name_length)
> +		name[name_length] = '\0';

I was thinking something along the lines of:

	char buf[13];
	int len;

	if (bufsize <= 0)
		return;

	len = min(get_monitor_name(edid, buf), bufsize - 1);
	memcpy(name, buf, len);
	name[len] = '\0';

BR,
Jani.

> +}
> +EXPORT_SYMBOL(drm_edid_get_monitor_name);
> +
>  /**
>   * drm_edid_to_eld - build ELD from EDID
>   * @connector: connector corresponding to the HDMI/DP sink
> @@ -3306,7 +3345,6 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
>  {
>  	uint8_t *eld = connector->eld;
>  	u8 *cea;
> -	u8 *name;
>  	u8 *db;
>  	int total_sad_count = 0;
>  	int mnl;
> @@ -3320,14 +3358,8 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
>  		return;
>  	}
>  
> -	name = NULL;
> -	drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
> -	/* max: 13 bytes EDID, 16 bytes ELD */
> -	for (mnl = 0; name && mnl < 13; mnl++) {
> -		if (name[mnl] == 0x0a)
> -			break;
> -		eld[20 + mnl] = name[mnl];
> -	}
> +	mnl = get_monitor_name(edid, eld + 20);
> +
>  	eld[4] = (cea[1] << 5) | mnl;
>  	DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
>  
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 8cb377c..6d46842 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -2500,6 +2500,8 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid);
>  extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
>  				 bool *edid_corrupt);
>  extern bool drm_edid_is_valid(struct edid *edid);
> +extern void drm_edid_get_monitor_name(struct edid *edid, char *name,
> +				      int buflen);
>  
>  extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
>  							 char topology[8]);

-- 
Jani Nikula, Intel Open Source Technology Center
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[PATCH v2 2/3] drm/dp/mst: Enhance DP MST debugfs output

[Jim Bride]

Add some additional information (input vs. output port, sink associated
with VC, peer device type, max number of VCs supported) and ensure that
any embedded '\0' characters in a branch device's devid string are not
written to debugfs.

v2: Rebase + change drm_edid_get_monitor_name() call to reflect new
    signature.

cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 27fbd79..0d3873e 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2729,7 +2729,7 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
 
 	seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports);
 	list_for_each_entry(port, &mstb->ports, next) {
-		seq_printf(m, "%sport: %d: ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
+		seq_printf(m, "%sport: %d: input: %d: pdt: %d, ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->input, port->pdt, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
 		if (port->mstb)
 			drm_dp_mst_dump_mstb(m, port->mstb);
 	}
@@ -2750,6 +2750,18 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
 	return false;
 }
 
+static void fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr,
+			       struct drm_dp_mst_port *port, char *name,
+			       int namelen)
+{
+	struct edid *mst_edid = NULL;
+
+	mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port);
+	if (mst_edid == NULL)
+		return;
+	drm_edid_get_monitor_name(mst_edid, name, namelen);
+}
+
 /**
  * drm_dp_mst_dump_topology(): dump topology to seq file.
  * @m: seq_file to dump output to
@@ -2762,6 +2774,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 {
 	int i;
 	struct drm_dp_mst_port *port;
+
 	mutex_lock(&mgr->lock);
 	if (mgr->mst_primary)
 		drm_dp_mst_dump_mstb(m, mgr->mst_primary);
@@ -2770,14 +2783,22 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 	mutex_unlock(&mgr->lock);
 
 	mutex_lock(&mgr->payload_lock);
-	seq_printf(m, "vcpi: %lx %lx\n", mgr->payload_mask, mgr->vcpi_mask);
+	seq_printf(m, "vcpi: %lx %lx %d\n", mgr->payload_mask, mgr->vcpi_mask,
+		mgr->max_payloads);
 
 	for (i = 0; i < mgr->max_payloads; i++) {
 		if (mgr->proposed_vcpis[i]) {
+			char name[13];
+
+			memset(name, 0, 13 * sizeof(char));
 			port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi);
-			seq_printf(m, "vcpi %d: %d %d %d\n", i, port->port_num, port->vcpi.vcpi, port->vcpi.num_slots);
+			fetch_monitor_name(mgr, port, name, 13);
+			seq_printf(m, "vcpi %d: %d %d %d sink name: %s\n", i,
+				   port->port_num, port->vcpi.vcpi,
+				   port->vcpi.num_slots,
+				   (name[0] != 0) ? name :  "Unknown");
 		} else
-			seq_printf(m, "vcpi %d:unsed\n", i);
+			seq_printf(m, "vcpi %d:unused\n", i);
 	}
 	for (i = 0; i < mgr->max_payloads; i++) {
 		seq_printf(m, "payload %d: %d, %d, %d\n",
@@ -2818,7 +2839,11 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 			seq_printf(m, "%02x", buf[i]);
 		seq_printf(m, " devid: ");
 		for (i = 0x3; i < 0x8; i++)
-			seq_printf(m, "%c", buf[i]);
+			if (buf[i] != '\0')
+				seq_printf(m, "%c", buf[i]);
+			else
+				break;
+
 		seq_printf(m, " revision: hw: %x.%x sw: %x.%x", buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
 		seq_printf(m, "\n");
 		bret = dump_dp_payload_table(mgr, buf);
-- 
2.5.0

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Re: [PATCH v2 2/3] drm/dp/mst: Enhance DP MST debugfs output

[Jani Nikula]

On Thu, 07 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> Add some additional information (input vs. output port, sink associated
> with VC, peer device type, max number of VCs supported) and ensure that
> any embedded '\0' characters in a branch device's devid string are not
> written to debugfs.
>
> v2: Rebase + change drm_edid_get_monitor_name() call to reflect new
>     signature.
>
> cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
> ---
>  drivers/gpu/drm/drm_dp_mst_topology.c | 35 ++++++++++++++++++++++++++++++-----
>  1 file changed, 30 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 27fbd79..0d3873e 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -2729,7 +2729,7 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
>  
>  	seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports);
>  	list_for_each_entry(port, &mstb->ports, next) {
> -		seq_printf(m, "%sport: %d: ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
> +		seq_printf(m, "%sport: %d: input: %d: pdt: %d, ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->input, port->pdt, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
>  		if (port->mstb)
>  			drm_dp_mst_dump_mstb(m, port->mstb);
>  	}
> @@ -2750,6 +2750,18 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
>  	return false;
>  }
>  
> +static void fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr,
> +			       struct drm_dp_mst_port *port, char *name,
> +			       int namelen)
> +{
> +	struct edid *mst_edid = NULL;

No need to initialize.

> +
> +	mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port);
> +	if (mst_edid == NULL)
> +		return;

Leave this check out to ensure a terminated name for mst_edid == NULL
from the call below.

> +	drm_edid_get_monitor_name(mst_edid, name, namelen);
> +}
> +
>  /**
>   * drm_dp_mst_dump_topology(): dump topology to seq file.
>   * @m: seq_file to dump output to
> @@ -2762,6 +2774,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
>  {
>  	int i;
>  	struct drm_dp_mst_port *port;
> +
>  	mutex_lock(&mgr->lock);
>  	if (mgr->mst_primary)
>  		drm_dp_mst_dump_mstb(m, mgr->mst_primary);
> @@ -2770,14 +2783,22 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
>  	mutex_unlock(&mgr->lock);
>  
>  	mutex_lock(&mgr->payload_lock);
> -	seq_printf(m, "vcpi: %lx %lx\n", mgr->payload_mask, mgr->vcpi_mask);
> +	seq_printf(m, "vcpi: %lx %lx %d\n", mgr->payload_mask, mgr->vcpi_mask,
> +		mgr->max_payloads);
>  
>  	for (i = 0; i < mgr->max_payloads; i++) {
>  		if (mgr->proposed_vcpis[i]) {
> +			char name[13];

You'll need 14 chars (i.e. +1 for termination).

> +
> +			memset(name, 0, 13 * sizeof(char));

This is no longer needed.

>  			port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi);
> -			seq_printf(m, "vcpi %d: %d %d %d\n", i, port->port_num, port->vcpi.vcpi, port->vcpi.num_slots);
> +			fetch_monitor_name(mgr, port, name, 13);

Replace 13 with sizeof(name).

> +			seq_printf(m, "vcpi %d: %d %d %d sink name: %s\n", i,
> +				   port->port_num, port->vcpi.vcpi,
> +				   port->vcpi.num_slots,
> +				   (name[0] != 0) ? name :  "Unknown");

Perhaps *name ? name : "Unknown"?

>  		} else
> -			seq_printf(m, "vcpi %d:unsed\n", i);
> +			seq_printf(m, "vcpi %d:unused\n", i);
>  	}
>  	for (i = 0; i < mgr->max_payloads; i++) {
>  		seq_printf(m, "payload %d: %d, %d, %d\n",
> @@ -2818,7 +2839,11 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
>  			seq_printf(m, "%02x", buf[i]);
>  		seq_printf(m, " devid: ");
>  		for (i = 0x3; i < 0x8; i++)

You could just make the loop condition i < 0x8 && buf[i].

> -			seq_printf(m, "%c", buf[i]);
> +			if (buf[i] != '\0')
> +				seq_printf(m, "%c", buf[i]);
> +			else
> +				break;
> +
>  		seq_printf(m, " revision: hw: %x.%x sw: %x.%x", buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
>  		seq_printf(m, "\n");
>  		bret = dump_dp_payload_table(mgr, buf);

-- 
Jani Nikula, Intel Open Source Technology Center
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[PATCH v2 3/3] drm/i915/dp/mst: Add source port info to debugfs output

[Jim Bride]

Modify the debugfs output for i915_dp_mst_info to list the source port for
the DP MST topology in question.

v2: rebase

Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index a2e3af0..192f399 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3441,7 +3441,8 @@ static int i915_dp_mst_info(struct seq_file *m, void *unused)
 		intel_dig_port = enc_to_dig_port(encoder);
 		if (!intel_dig_port->dp.can_mst)
 			continue;
-
+		seq_printf(m, "MST Source Port %c\n",
+			   port_name(intel_dig_port->port));
 		drm_dp_mst_dump_topology(m, &intel_dig_port->dp.mst_mgr);
 	}
 	drm_modeset_unlock_all(dev);
-- 
2.5.0

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✗ Fi.CI.BAT: failure for Minor i915_dp_mst_info output enhancements (rev2)

[Patchwork]

== Series Details ==

Series: Minor i915_dp_mst_info output enhancements (rev2)
URL   : https://patchwork.freedesktop.org/series/5346/
State : failure

== Summary ==

Series 5346v2 Minor i915_dp_mst_info output enhancements
http://patchwork.freedesktop.org/api/1.0/series/5346/revisions/2/mbox/

Test drv_getparams_basic:
        Subgroup basic-subslice-total:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test drv_module_reload_basic:
                incomplete -> PASS       (bsw-nuc-2)
Test gem_basic:
        Subgroup bad-close:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup create-close:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup create-fd-close:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test gem_ctx_param_basic:
        Subgroup basic:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup invalid-ctx-set:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup invalid-param-get:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup invalid-param-set:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup root-set:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test gem_ctx_switch:
        Subgroup basic-default:
                skip       -> PASS       (bsw-nuc-2)
Test gem_exec_basic:
        Subgroup basic-blt:
                skip       -> PASS       (bsw-nuc-2)
        Subgroup gtt-bsd:
                skip       -> PASS       (bsw-nuc-2)
        Subgroup readonly-bsd:
                skip       -> PASS       (bsw-nuc-2)
        Subgroup readonly-render:
                skip       -> PASS       (bsw-nuc-2)
        Subgroup readonly-vebox:
                skip       -> PASS       (bsw-nuc-2)
Test gem_exec_store:
        Subgroup basic-bsd:
                skip       -> PASS       (bsw-nuc-2)
        Subgroup basic-default:
                skip       -> PASS       (bsw-nuc-2)
        Subgroup basic-vebox:
                skip       -> PASS       (bsw-nuc-2)
Test gem_exec_whisper:
        Subgroup basic:
                skip       -> PASS       (bsw-nuc-2)
Test gem_mmap:
        Subgroup basic-small-bo:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test gem_mmap_gtt:
        Subgroup basic-write:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup basic-write-gtt:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test gem_ringfill:
        Subgroup basic-default-hang:
                skip       -> PASS       (bsw-nuc-2)
Test gem_sync:
        Subgroup basic-blt:
                skip       -> PASS       (bsw-nuc-2)
        Subgroup basic-vebox:
                skip       -> PASS       (bsw-nuc-2)
Test gem_tiled_pread_basic:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test kms_addfb_basic:
        Subgroup addfb25-modifier-no-flag:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup addfb25-y-tiled:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup bad-pitch-65536:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup basic-x-tiled:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup framebuffer-vs-set-tiling:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup too-wide:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test kms_flip:
        Subgroup basic-flip-vs-wf_vblank:
                dmesg-fail -> PASS       (bsw-nuc-2)
Test kms_pipe_crc_basic:
        Subgroup read-crc-pipe-c-frame-sequence:
                dmesg-fail -> PASS       (bsw-nuc-2)
        Subgroup suspend-read-crc-pipe-c:
                dmesg-warn -> PASS       (bsw-nuc-2)
Test prime_self_import:
        Subgroup basic-with_fd_dup:
                dmesg-warn -> PASS       (bsw-nuc-2)
        Subgroup basic-with_one_bo_two_files:
                dmesg-warn -> PASS       (bsw-nuc-2)

bdw-nuci7        total:196  pass:184  dwarn:0   dfail:0   fail:0   skip:12 
bsw-nuc-2        total:196  pass:159  dwarn:0   dfail:0   fail:0   skip:37 
byt-nuc          total:196  pass:161  dwarn:0   dfail:0   fail:0   skip:35 
hsw-brixbox      total:196  pass:174  dwarn:0   dfail:0   fail:0   skip:22 
hsw-gt2          total:196  pass:179  dwarn:0   dfail:0   fail:0   skip:17 
skl-i7k-2        total:196  pass:173  dwarn:0   dfail:0   fail:0   skip:23 
snb-dellxps      total:196  pass:162  dwarn:0   dfail:0   fail:0   skip:34 
BOOT FAILED for bdw-ultra
BOOT FAILED for ilk-hp8440p
BOOT FAILED for ivb-t430s

Results at /archive/results/CI_IGT_test/Patchwork_1838/

851708c7e97537ed618fadbe5d342eaf8fa5146d drm-intel-nightly: 2016y-04m-07d-13h-56m-00s UTC integration manifest
d6c0df3791168c85675b94b5f460be6a15ee5a92 drm/i915/dp/mst: Add source port info to debugfs output
ad413419060a77507dd44d5b18622bc63950da88 drm/dp/mst: Enhance DP MST debugfs output
f67c19b2a4169592141d30a2b7dfe08817f92da0 drm/edid: Add drm_edid_get_monitor_name()

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[PATCH v3 1/3] drm/edid: Add drm_edid_get_monitor_name()

[Jim Bride]

In order to include monitor name information in debugfs
output we needed to add a function that would extract the
monitor name from the EDID, and that function needed to
reside in the file  where the rest of the EDID helper
functions are implemented.

v2: Refactor to have drm_edid_get_monitor_name() and drm_edid_to_eld()
    use a common helper function to extract the monitor name from the
    edid. [Jani] + rebase.

v3: Minor changes suggested by Jani + rebase.

cc: dri-devel@lists.freedesktop.org
cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/drm_edid.c | 51 ++++++++++++++++++++++++++++++++++++++--------
 include/drm/drm_crtc.h     |  2 ++
 2 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 558ef9f..da30ce3 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3293,6 +3293,46 @@ monitor_name(struct detailed_timing *t, void *data)
 		*(u8 **)data = t->data.other_data.data.str.str;
 }
 
+static int get_monitor_name(struct edid *edid, char name[13])
+{
+	char *edid_name = NULL;
+	int mnl;
+
+	if (!edid || !name)
+		return 0;
+
+	drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
+	for (mnl = 0; edid_name && mnl < 13; mnl++) {
+		if (edid_name[mnl] == 0x0a)
+			break;
+
+		name[mnl] = edid_name[mnl];
+	}
+
+	return mnl;
+}
+
+/**
+ * drm_edid_get_monitor_name - fetch the monitor name from the edid
+ * @edid: monitor EDID information
+ * @name: pointer to a character array to hold the name of the monitor
+ * @bufsize: The size of the name buffer (should be at least 13 chars.)
+ *
+ */
+void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize)
+{
+	int name_length = -1;
+	char buf[13];
+	
+	if (bufsize <= 0)
+		return;
+
+	name_length = min(get_monitor_name(edid, buf), bufsize - 1);
+	memcpy(name, buf, name_length);
+	name[name_length] = '\0';
+}
+EXPORT_SYMBOL(drm_edid_get_monitor_name);
+
 /**
  * drm_edid_to_eld - build ELD from EDID
  * @connector: connector corresponding to the HDMI/DP sink
@@ -3306,7 +3346,6 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
 {
 	uint8_t *eld = connector->eld;
 	u8 *cea;
-	u8 *name;
 	u8 *db;
 	int total_sad_count = 0;
 	int mnl;
@@ -3320,14 +3359,8 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
 		return;
 	}
 
-	name = NULL;
-	drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
-	/* max: 13 bytes EDID, 16 bytes ELD */
-	for (mnl = 0; name && mnl < 13; mnl++) {
-		if (name[mnl] == 0x0a)
-			break;
-		eld[20 + mnl] = name[mnl];
-	}
+	mnl = get_monitor_name(edid, eld + 20);
+
 	eld[4] = (cea[1] << 5) | mnl;
 	DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
 
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 8cb377c..6d46842 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -2500,6 +2500,8 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid);
 extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
 				 bool *edid_corrupt);
 extern bool drm_edid_is_valid(struct edid *edid);
+extern void drm_edid_get_monitor_name(struct edid *edid, char *name,
+				      int buflen);
 
 extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
 							 char topology[8]);
-- 
2.5.0

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Re: [PATCH v3 1/3] drm/edid: Add drm_edid_get_monitor_name()

[Jani Nikula]

On Mon, 11 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> In order to include monitor name information in debugfs
> output we needed to add a function that would extract the
> monitor name from the EDID, and that function needed to
> reside in the file  where the rest of the EDID helper
> functions are implemented.
>
> v2: Refactor to have drm_edid_get_monitor_name() and drm_edid_to_eld()
>     use a common helper function to extract the monitor name from the
>     edid. [Jani] + rebase.
>
> v3: Minor changes suggested by Jani + rebase.
>
> cc: dri-devel@lists.freedesktop.org
> cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
> ---
>  drivers/gpu/drm/drm_edid.c | 51 ++++++++++++++++++++++++++++++++++++++--------
>  include/drm/drm_crtc.h     |  2 ++
>  2 files changed, 44 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 558ef9f..da30ce3 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3293,6 +3293,46 @@ monitor_name(struct detailed_timing *t, void *data)
>  		*(u8 **)data = t->data.other_data.data.str.str;
>  }
>  
> +static int get_monitor_name(struct edid *edid, char name[13])
> +{
> +	char *edid_name = NULL;
> +	int mnl;
> +
> +	if (!edid || !name)
> +		return 0;
> +
> +	drm_for_each_detailed_block((u8 *)edid, monitor_name, &edid_name);
> +	for (mnl = 0; edid_name && mnl < 13; mnl++) {
> +		if (edid_name[mnl] == 0x0a)
> +			break;
> +
> +		name[mnl] = edid_name[mnl];
> +	}
> +
> +	return mnl;
> +}
> +
> +/**
> + * drm_edid_get_monitor_name - fetch the monitor name from the edid
> + * @edid: monitor EDID information
> + * @name: pointer to a character array to hold the name of the monitor
> + * @bufsize: The size of the name buffer (should be at least 13 chars.)

Nitpick, should be 13 + termination = 14 bytes.

> + *
> + */
> +void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize)
> +{
> +	int name_length = -1;

Nitpick, no need to initialize.

Other than those,

Reviewed-by: Jani Nikula <jani.nikula@intel.com>


> +	char buf[13];
> +	
> +	if (bufsize <= 0)
> +		return;
> +
> +	name_length = min(get_monitor_name(edid, buf), bufsize - 1);
> +	memcpy(name, buf, name_length);
> +	name[name_length] = '\0';
> +}
> +EXPORT_SYMBOL(drm_edid_get_monitor_name);
> +
>  /**
>   * drm_edid_to_eld - build ELD from EDID
>   * @connector: connector corresponding to the HDMI/DP sink
> @@ -3306,7 +3346,6 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
>  {
>  	uint8_t *eld = connector->eld;
>  	u8 *cea;
> -	u8 *name;
>  	u8 *db;
>  	int total_sad_count = 0;
>  	int mnl;
> @@ -3320,14 +3359,8 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
>  		return;
>  	}
>  
> -	name = NULL;
> -	drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
> -	/* max: 13 bytes EDID, 16 bytes ELD */
> -	for (mnl = 0; name && mnl < 13; mnl++) {
> -		if (name[mnl] == 0x0a)
> -			break;
> -		eld[20 + mnl] = name[mnl];
> -	}
> +	mnl = get_monitor_name(edid, eld + 20);
> +
>  	eld[4] = (cea[1] << 5) | mnl;
>  	DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
>  
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 8cb377c..6d46842 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -2500,6 +2500,8 @@ extern int drm_edid_header_is_valid(const u8 *raw_edid);
>  extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
>  				 bool *edid_corrupt);
>  extern bool drm_edid_is_valid(struct edid *edid);
> +extern void drm_edid_get_monitor_name(struct edid *edid, char *name,
> +				      int buflen);
>  
>  extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
>  							 char topology[8]);

-- 
Jani Nikula, Intel Open Source Technology Center
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[PATCH v3 2/3] drm/dp/mst: Enhance DP MST debugfs output

[Jim Bride]

Add some additional information (input vs. output port, sink associated
with VC, peer device type, max number of VCs supported) and ensure that
any embedded '\0' characters in a branch device's devid string are not
written to debugfs.

v2: Rebase + change drm_edid_get_monitor_name() call to reflect new
    signature.

v3: Minor changes suggested by Jani + rebase.

cc: dri-devel@lists.freedesktop.org
cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 27fbd79..06d8b0a 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2729,7 +2729,7 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
 
 	seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports);
 	list_for_each_entry(port, &mstb->ports, next) {
-		seq_printf(m, "%sport: %d: ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
+		seq_printf(m, "%sport: %d: input: %d: pdt: %d, ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->input, port->pdt, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
 		if (port->mstb)
 			drm_dp_mst_dump_mstb(m, port->mstb);
 	}
@@ -2750,6 +2750,16 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
 	return false;
 }
 
+static void fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr,
+			       struct drm_dp_mst_port *port, char *name,
+			       int namelen)
+{
+	struct edid *mst_edid;
+
+	mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port);
+	drm_edid_get_monitor_name(mst_edid, name, namelen);
+}
+
 /**
  * drm_dp_mst_dump_topology(): dump topology to seq file.
  * @m: seq_file to dump output to
@@ -2762,6 +2772,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 {
 	int i;
 	struct drm_dp_mst_port *port;
+
 	mutex_lock(&mgr->lock);
 	if (mgr->mst_primary)
 		drm_dp_mst_dump_mstb(m, mgr->mst_primary);
@@ -2770,14 +2781,21 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 	mutex_unlock(&mgr->lock);
 
 	mutex_lock(&mgr->payload_lock);
-	seq_printf(m, "vcpi: %lx %lx\n", mgr->payload_mask, mgr->vcpi_mask);
+	seq_printf(m, "vcpi: %lx %lx %d\n", mgr->payload_mask, mgr->vcpi_mask,
+		mgr->max_payloads);
 
 	for (i = 0; i < mgr->max_payloads; i++) {
 		if (mgr->proposed_vcpis[i]) {
+			char name[14];
+
 			port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi);
-			seq_printf(m, "vcpi %d: %d %d %d\n", i, port->port_num, port->vcpi.vcpi, port->vcpi.num_slots);
+			fetch_monitor_name(mgr, port, name, sizeof(name));
+			seq_printf(m, "vcpi %d: %d %d %d sink name: %s\n", i,
+				   port->port_num, port->vcpi.vcpi,
+				   port->vcpi.num_slots,
+				   (*name != 0) ? name :  "Unknown");
 		} else
-			seq_printf(m, "vcpi %d:unsed\n", i);
+			seq_printf(m, "vcpi %d:unused\n", i);
 	}
 	for (i = 0; i < mgr->max_payloads; i++) {
 		seq_printf(m, "payload %d: %d, %d, %d\n",
@@ -2817,8 +2835,9 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 		for (i = 0; i < 0x3; i++)
 			seq_printf(m, "%02x", buf[i]);
 		seq_printf(m, " devid: ");
-		for (i = 0x3; i < 0x8; i++)
+		for (i = 0x3; i < 0x8 && buf[i]; i++)
 			seq_printf(m, "%c", buf[i]);
+
 		seq_printf(m, " revision: hw: %x.%x sw: %x.%x", buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
 		seq_printf(m, "\n");
 		bret = dump_dp_payload_table(mgr, buf);
-- 
2.5.0

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Re: [PATCH v3 2/3] drm/dp/mst: Enhance DP MST debugfs output

[Jani Nikula]

On Mon, 11 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> Add some additional information (input vs. output port, sink associated
> with VC, peer device type, max number of VCs supported) and ensure that
> any embedded '\0' characters in a branch device's devid string are not
> written to debugfs.
>
> v2: Rebase + change drm_edid_get_monitor_name() call to reflect new
>     signature.
>
> v3: Minor changes suggested by Jani + rebase.
>
> cc: dri-devel@lists.freedesktop.org
> cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Jim Bride <jim.bride@linux.intel.com>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>


> ---
>  drivers/gpu/drm/drm_dp_mst_topology.c | 29 ++++++++++++++++++++++++-----
>  1 file changed, 24 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 27fbd79..06d8b0a 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -2729,7 +2729,7 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
>  
>  	seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports);
>  	list_for_each_entry(port, &mstb->ports, next) {
> -		seq_printf(m, "%sport: %d: ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
> +		seq_printf(m, "%sport: %d: input: %d: pdt: %d, ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->input, port->pdt, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
>  		if (port->mstb)
>  			drm_dp_mst_dump_mstb(m, port->mstb);
>  	}
> @@ -2750,6 +2750,16 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
>  	return false;
>  }
>  
> +static void fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr,
> +			       struct drm_dp_mst_port *port, char *name,
> +			       int namelen)
> +{
> +	struct edid *mst_edid;
> +
> +	mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port);
> +	drm_edid_get_monitor_name(mst_edid, name, namelen);
> +}
> +
>  /**
>   * drm_dp_mst_dump_topology(): dump topology to seq file.
>   * @m: seq_file to dump output to
> @@ -2762,6 +2772,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
>  {
>  	int i;
>  	struct drm_dp_mst_port *port;
> +
>  	mutex_lock(&mgr->lock);
>  	if (mgr->mst_primary)
>  		drm_dp_mst_dump_mstb(m, mgr->mst_primary);
> @@ -2770,14 +2781,21 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
>  	mutex_unlock(&mgr->lock);
>  
>  	mutex_lock(&mgr->payload_lock);
> -	seq_printf(m, "vcpi: %lx %lx\n", mgr->payload_mask, mgr->vcpi_mask);
> +	seq_printf(m, "vcpi: %lx %lx %d\n", mgr->payload_mask, mgr->vcpi_mask,
> +		mgr->max_payloads);
>  
>  	for (i = 0; i < mgr->max_payloads; i++) {
>  		if (mgr->proposed_vcpis[i]) {
> +			char name[14];
> +
>  			port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi);
> -			seq_printf(m, "vcpi %d: %d %d %d\n", i, port->port_num, port->vcpi.vcpi, port->vcpi.num_slots);
> +			fetch_monitor_name(mgr, port, name, sizeof(name));
> +			seq_printf(m, "vcpi %d: %d %d %d sink name: %s\n", i,
> +				   port->port_num, port->vcpi.vcpi,
> +				   port->vcpi.num_slots,
> +				   (*name != 0) ? name :  "Unknown");
>  		} else
> -			seq_printf(m, "vcpi %d:unsed\n", i);
> +			seq_printf(m, "vcpi %d:unused\n", i);
>  	}
>  	for (i = 0; i < mgr->max_payloads; i++) {
>  		seq_printf(m, "payload %d: %d, %d, %d\n",
> @@ -2817,8 +2835,9 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
>  		for (i = 0; i < 0x3; i++)
>  			seq_printf(m, "%02x", buf[i]);
>  		seq_printf(m, " devid: ");
> -		for (i = 0x3; i < 0x8; i++)
> +		for (i = 0x3; i < 0x8 && buf[i]; i++)
>  			seq_printf(m, "%c", buf[i]);
> +
>  		seq_printf(m, " revision: hw: %x.%x sw: %x.%x", buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
>  		seq_printf(m, "\n");
>  		bret = dump_dp_payload_table(mgr, buf);

-- 
Jani Nikula, Intel Open Source Technology Center
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Re: [PATCH v3 2/3] drm/dp/mst: Enhance DP MST debugfs output

[Daniel Vetter]

On Thu, Apr 14, 2016 at 09:47:22AM +0300, Jani Nikula wrote:
> On Mon, 11 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> > Add some additional information (input vs. output port, sink associated
> > with VC, peer device type, max number of VCs supported) and ensure that
> > any embedded '\0' characters in a branch device's devid string are not
> > written to debugfs.
> >
> > v2: Rebase + change drm_edid_get_monitor_name() call to reflect new
> >     signature.
> >
> > v3: Minor changes suggested by Jani + rebase.
> >
> > cc: dri-devel@lists.freedesktop.org
> > cc: Jani Nikula <jani.nikula@linux.intel.com>
> > Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
> 
> Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Patch series seems a bit messed up here (I don't have a 3/3 here). Can you
pls resend the entire pile, with nitpicks+reviewed-by and everything
included, in a new thread?

Thanks, Daniel

> 
> 
> > ---
> >  drivers/gpu/drm/drm_dp_mst_topology.c | 29 ++++++++++++++++++++++++-----
> >  1 file changed, 24 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> > index 27fbd79..06d8b0a 100644
> > --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> > +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> > @@ -2729,7 +2729,7 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
> >  
> >  	seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports);
> >  	list_for_each_entry(port, &mstb->ports, next) {
> > -		seq_printf(m, "%sport: %d: ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
> > +		seq_printf(m, "%sport: %d: input: %d: pdt: %d, ddps: %d ldps: %d, sdp: %d/%d, %p, conn: %p\n", prefix, port->port_num, port->input, port->pdt, port->ddps, port->ldps, port->num_sdp_streams, port->num_sdp_stream_sinks, port, port->connector);
> >  		if (port->mstb)
> >  			drm_dp_mst_dump_mstb(m, port->mstb);
> >  	}
> > @@ -2750,6 +2750,16 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
> >  	return false;
> >  }
> >  
> > +static void fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr,
> > +			       struct drm_dp_mst_port *port, char *name,
> > +			       int namelen)
> > +{
> > +	struct edid *mst_edid;
> > +
> > +	mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port);
> > +	drm_edid_get_monitor_name(mst_edid, name, namelen);
> > +}
> > +
> >  /**
> >   * drm_dp_mst_dump_topology(): dump topology to seq file.
> >   * @m: seq_file to dump output to
> > @@ -2762,6 +2772,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
> >  {
> >  	int i;
> >  	struct drm_dp_mst_port *port;
> > +
> >  	mutex_lock(&mgr->lock);
> >  	if (mgr->mst_primary)
> >  		drm_dp_mst_dump_mstb(m, mgr->mst_primary);
> > @@ -2770,14 +2781,21 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
> >  	mutex_unlock(&mgr->lock);
> >  
> >  	mutex_lock(&mgr->payload_lock);
> > -	seq_printf(m, "vcpi: %lx %lx\n", mgr->payload_mask, mgr->vcpi_mask);
> > +	seq_printf(m, "vcpi: %lx %lx %d\n", mgr->payload_mask, mgr->vcpi_mask,
> > +		mgr->max_payloads);
> >  
> >  	for (i = 0; i < mgr->max_payloads; i++) {
> >  		if (mgr->proposed_vcpis[i]) {
> > +			char name[14];
> > +
> >  			port = container_of(mgr->proposed_vcpis[i], struct drm_dp_mst_port, vcpi);
> > -			seq_printf(m, "vcpi %d: %d %d %d\n", i, port->port_num, port->vcpi.vcpi, port->vcpi.num_slots);
> > +			fetch_monitor_name(mgr, port, name, sizeof(name));
> > +			seq_printf(m, "vcpi %d: %d %d %d sink name: %s\n", i,
> > +				   port->port_num, port->vcpi.vcpi,
> > +				   port->vcpi.num_slots,
> > +				   (*name != 0) ? name :  "Unknown");
> >  		} else
> > -			seq_printf(m, "vcpi %d:unsed\n", i);
> > +			seq_printf(m, "vcpi %d:unused\n", i);
> >  	}
> >  	for (i = 0; i < mgr->max_payloads; i++) {
> >  		seq_printf(m, "payload %d: %d, %d, %d\n",
> > @@ -2817,8 +2835,9 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
> >  		for (i = 0; i < 0x3; i++)
> >  			seq_printf(m, "%02x", buf[i]);
> >  		seq_printf(m, " devid: ");
> > -		for (i = 0x3; i < 0x8; i++)
> > +		for (i = 0x3; i < 0x8 && buf[i]; i++)
> >  			seq_printf(m, "%c", buf[i]);
> > +
> >  		seq_printf(m, " revision: hw: %x.%x sw: %x.%x", buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
> >  		seq_printf(m, "\n");
> >  		bret = dump_dp_payload_table(mgr, buf);
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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[PATCH v3 3/3] drm/i915/dp/mst: Add source port info to debugfs output

[Jim Bride]

Modify the debugfs output for i915_dp_mst_info to list the source port for
the DP MST topology in question.

v2: rebase
v3: rebase

cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9640738..644e80b 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3446,7 +3446,8 @@ static int i915_dp_mst_info(struct seq_file *m, void *unused)
 		intel_dig_port = enc_to_dig_port(encoder);
 		if (!intel_dig_port->dp.can_mst)
 			continue;
-
+		seq_printf(m, "MST Source Port %c\n",
+			   port_name(intel_dig_port->port));
 		drm_dp_mst_dump_topology(m, &intel_dig_port->dp.mst_mgr);
 	}
 	drm_modeset_unlock_all(dev);
-- 
2.5.0

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Re: [PATCH v3 3/3] drm/i915/dp/mst: Add source port info to debugfs output

[Jani Nikula]

On Mon, 11 Apr 2016, Jim Bride <jim.bride@linux.intel.com> wrote:
> Modify the debugfs output for i915_dp_mst_info to list the source port for
> the DP MST topology in question.
>
> v2: rebase
> v3: rebase
>
> cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Jim Bride <jim.bride@linux.intel.com>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>


> ---
>  drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index 9640738..644e80b 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -3446,7 +3446,8 @@ static int i915_dp_mst_info(struct seq_file *m, void *unused)
>  		intel_dig_port = enc_to_dig_port(encoder);
>  		if (!intel_dig_port->dp.can_mst)
>  			continue;
> -
> +		seq_printf(m, "MST Source Port %c\n",
> +			   port_name(intel_dig_port->port));
>  		drm_dp_mst_dump_topology(m, &intel_dig_port->dp.mst_mgr);
>  	}
>  	drm_modeset_unlock_all(dev);

-- 
Jani Nikula, Intel Open Source Technology Center
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✗ Fi.CI.BAT: failure for Minor i915_dp_mst_info output enhancements (rev4)

[Patchwork]

== Series Details ==

Series: Minor i915_dp_mst_info output enhancements (rev4)
URL   : https://patchwork.freedesktop.org/series/5346/
State : failure

== Summary ==

  CC      net/ipv4/tcp_cubic.o
  CC      net/ipv4/xfrm4_policy.o
  CC      net/ipv6/xfrm6_input.o
  CC      net/ipv4/xfrm4_state.o
  CC      net/ipv4/xfrm4_input.o
  CC      net/ipv4/xfrm4_output.o
  CC      net/ipv6/xfrm6_output.o
  CC      net/ipv4/xfrm4_protocol.o
  CC      net/ipv6/xfrm6_protocol.o
  CC      net/ipv6/fib6_rules.o
  CC      net/ipv6/proc.o
  CC      net/ipv6/syncookies.o
  CC      net/ipv6/mip6.o
  CC      net/ipv6/addrconf_core.o
  CC      net/ipv6/exthdrs_core.o
  CC      net/ipv6/ip6_checksum.o
  CC      net/ipv6/ip6_icmp.o
  CC      net/ipv6/output_core.o
  CC      net/ipv6/protocol.o
  CC      net/ipv6/ip6_offload.o
  CC      net/ipv6/tcpv6_offload.o
  CC      net/ipv6/udp_offload.o
  CC      net/ipv6/exthdrs_offload.o
  LD      net/xfrm/built-in.o
  CC      net/ipv6/inet6_hashtables.o
  CC      net/ipv6/mcast_snoop.o
  LD      net/ipv4/built-in.o
  LD      net/ipv6/ipv6.o
  LD      net/ipv6/built-in.o
  LD      net/built-in.o

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