[PATCH] drm/msm/dp: do not notify audio subsystem if sink doesn't support audio

[PATCH] drm/msm/dp: do not notify audio subsystem if sink doesn't support audio

[Abhinav Kumar]

For sinks that do not support audio, there is no need to notify
audio subsystem of the connection event.

This will make sure that audio routes only to the primary display
when connected to such sinks.

Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 4a5735564be2..d970980b0ca5 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -555,8 +555,16 @@ static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
 		bool plugged)
 {
-	if (dp_display->plugged_cb && dp_display->codec_dev)
-		dp_display->plugged_cb(dp_display->codec_dev, plugged);
+	struct dp_display_private *dp;
+
+	dp = container_of(g_dp_display,
+			struct dp_display_private, dp_display);
+
+	if (dp_display->plugged_cb && dp_display->codec_dev) {
+		/* notify audio subsystem only if sink supports audio */
+		if (dp->audio_supported)
+			dp_display->plugged_cb(dp_display->codec_dev, plugged);
+	}
 }
 
 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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Re: [PATCH] drm/msm/dp: do not notify audio subsystem if sink doesn't support audio

[Stephen Boyd]

Quoting Abhinav Kumar (2020-10-29 13:55:09)
> For sinks that do not support audio, there is no need to notify
> audio subsystem of the connection event.
> 
> This will make sure that audio routes only to the primary display
> when connected to such sinks.
> 

Does this need a Fixes tag? Or it's just an optimization patch?

> Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
> ---
>  drivers/gpu/drm/msm/dp/dp_display.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 4a5735564be2..d970980b0ca5 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -555,8 +555,16 @@ static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
>  static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
>                 bool plugged)
>  {
> -       if (dp_display->plugged_cb && dp_display->codec_dev)
> -               dp_display->plugged_cb(dp_display->codec_dev, plugged);
> +       struct dp_display_private *dp;
> +
> +       dp = container_of(g_dp_display,

What is g_dp_display? I guess this doesn't compile?

> +                       struct dp_display_private, dp_display);
> +
> +       if (dp_display->plugged_cb && dp_display->codec_dev) {
> +               /* notify audio subsystem only if sink supports audio */
> +               if (dp->audio_supported)

Can we combine this into the above if statement?

> +                       dp_display->plugged_cb(dp_display->codec_dev, plugged);

Then this isn't as nested.

> +       }
>  }
>  
>  static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
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Re: [Freedreno] [PATCH] drm/msm/dp: do not notify audio subsystem if sink doesn't support audio

[abhinavk]

Hi Stephen

Thanks for the review.

On 2020-11-02 13:19, Stephen Boyd wrote:
> Quoting Abhinav Kumar (2020-10-29 13:55:09)
>> For sinks that do not support audio, there is no need to notify
>> audio subsystem of the connection event.
>> 
>> This will make sure that audio routes only to the primary display
>> when connected to such sinks.
>> 
> 
> Does this need a Fixes tag? Or it's just an optimization patch?
This is an unhandled corner case ( VGA dongle ) for DP audio and will 
make
sure we do not switch audio output from primary to external when 
connected to
a sink which does not support audio.
I thought of adding a fixes tag pointing to 
https://patchwork.freedesktop.org/patch/390236/.
But at the same time, thought this can go in as a standlone patch as 
well.
If you think its required, I will add the fixes tag pointing to the base 
audio patch.
> 
>> Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
>> ---
>>  drivers/gpu/drm/msm/dp/dp_display.c | 12 ++++++++++--
>>  1 file changed, 10 insertions(+), 2 deletions(-)
>> 
>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c 
>> b/drivers/gpu/drm/msm/dp/dp_display.c
>> index 4a5735564be2..d970980b0ca5 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_display.c
>> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
>> @@ -555,8 +555,16 @@ static int dp_connect_pending_timeout(struct 
>> dp_display_private *dp, u32 data)
>>  static void dp_display_handle_plugged_change(struct msm_dp 
>> *dp_display,
>>                 bool plugged)
>>  {
>> -       if (dp_display->plugged_cb && dp_display->codec_dev)
>> -               dp_display->plugged_cb(dp_display->codec_dev, 
>> plugged);
>> +       struct dp_display_private *dp;
>> +
>> +       dp = container_of(g_dp_display,
> 
> What is g_dp_display? I guess this doesn't compile?
g_dp_display is the global dp_display pointer in the dp_display.c file. 
It does compile.
> 
>> +                       struct dp_display_private, dp_display);
>> +
>> +       if (dp_display->plugged_cb && dp_display->codec_dev) {
>> +               /* notify audio subsystem only if sink supports audio 
>> */
>> +               if (dp->audio_supported)
> 
> Can we combine this into the above if statement?
> 
>> +                       dp_display->plugged_cb(dp_display->codec_dev, 
>> plugged);
> 
> Then this isn't as nested.
Ok, will do ...
> 
>> +       }
>>  }
>> 
>>  static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 
>> data)
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Re: [Freedreno] [PATCH] drm/msm/dp: do not notify audio subsystem if sink doesn't support audio

[Stephen Boyd]

Quoting abhinavk@codeaurora.org (2020-11-02 14:43:33)
> Hi Stephen
> 
> Thanks for the review.
> 
> On 2020-11-02 13:19, Stephen Boyd wrote:
> > Quoting Abhinav Kumar (2020-10-29 13:55:09)
> >> For sinks that do not support audio, there is no need to notify
> >> audio subsystem of the connection event.
> >> 
> >> This will make sure that audio routes only to the primary display
> >> when connected to such sinks.
> >> 
> > 
> > Does this need a Fixes tag? Or it's just an optimization patch?
> This is an unhandled corner case ( VGA dongle ) for DP audio and will 
> make
> sure we do not switch audio output from primary to external when 
> connected to
> a sink which does not support audio.
> I thought of adding a fixes tag pointing to 
> https://patchwork.freedesktop.org/patch/390236/.
> But at the same time, thought this can go in as a standlone patch as 
> well.
> If you think its required, I will add the fixes tag pointing to the base 
> audio patch.

Yeah Fixes is nice so we know what is fixed.

> > 
> >> Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
> >> ---
> >>  drivers/gpu/drm/msm/dp/dp_display.c | 12 ++++++++++--
> >>  1 file changed, 10 insertions(+), 2 deletions(-)
> >> 
> >> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c 
> >> b/drivers/gpu/drm/msm/dp/dp_display.c
> >> index 4a5735564be2..d970980b0ca5 100644
> >> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> >> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> >> @@ -555,8 +555,16 @@ static int dp_connect_pending_timeout(struct 
> >> dp_display_private *dp, u32 data)
> >>  static void dp_display_handle_plugged_change(struct msm_dp 
> >> *dp_display,
> >>                 bool plugged)
> >>  {
> >> -       if (dp_display->plugged_cb && dp_display->codec_dev)
> >> -               dp_display->plugged_cb(dp_display->codec_dev, 
> >> plugged);
> >> +       struct dp_display_private *dp;
> >> +
> >> +       dp = container_of(g_dp_display,
> > 
> > What is g_dp_display? I guess this doesn't compile?
> g_dp_display is the global dp_display pointer in the dp_display.c file. 
> It does compile.

Oh gross. Can we not use it if dp_display points to it?
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Re: [Freedreno] [PATCH] drm/msm/dp: do not notify audio subsystem if sink doesn't support audio

[abhinavk]

Hi Stephen

On 2020-11-02 15:06, Stephen Boyd wrote:
> Quoting abhinavk@codeaurora.org (2020-11-02 14:43:33)
>> Hi Stephen
>> 
>> Thanks for the review.
>> 
>> On 2020-11-02 13:19, Stephen Boyd wrote:
>> > Quoting Abhinav Kumar (2020-10-29 13:55:09)
>> >> For sinks that do not support audio, there is no need to notify
>> >> audio subsystem of the connection event.
>> >>
>> >> This will make sure that audio routes only to the primary display
>> >> when connected to such sinks.
>> >>
>> >
>> > Does this need a Fixes tag? Or it's just an optimization patch?
>> This is an unhandled corner case ( VGA dongle ) for DP audio and will
>> make
>> sure we do not switch audio output from primary to external when
>> connected to
>> a sink which does not support audio.
>> I thought of adding a fixes tag pointing to
>> https://patchwork.freedesktop.org/patch/390236/.
>> But at the same time, thought this can go in as a standlone patch as
>> well.
>> If you think its required, I will add the fixes tag pointing to the 
>> base
>> audio patch.
> 
> Yeah Fixes is nice so we know what is fixed.
Ok sure, will include it.
> 
>> >
>> >> Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
>> >> ---
>> >>  drivers/gpu/drm/msm/dp/dp_display.c | 12 ++++++++++--
>> >>  1 file changed, 10 insertions(+), 2 deletions(-)
>> >>
>> >> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
>> >> b/drivers/gpu/drm/msm/dp/dp_display.c
>> >> index 4a5735564be2..d970980b0ca5 100644
>> >> --- a/drivers/gpu/drm/msm/dp/dp_display.c
>> >> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
>> >> @@ -555,8 +555,16 @@ static int dp_connect_pending_timeout(struct
>> >> dp_display_private *dp, u32 data)
>> >>  static void dp_display_handle_plugged_change(struct msm_dp
>> >> *dp_display,
>> >>                 bool plugged)
>> >>  {
>> >> -       if (dp_display->plugged_cb && dp_display->codec_dev)
>> >> -               dp_display->plugged_cb(dp_display->codec_dev,
>> >> plugged);
>> >> +       struct dp_display_private *dp;
>> >> +
>> >> +       dp = container_of(g_dp_display,
>> >
>> > What is g_dp_display? I guess this doesn't compile?
>> g_dp_display is the global dp_display pointer in the dp_display.c 
>> file.
>> It does compile.
> 
> Oh gross. Can we not use it if dp_display points to it?
Ok sure, will get it from dp_display
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