Re: [PATCH] drm/i915: don't always do full mode sets when infoframes are enabled

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On Fri, 05 Dec 2014, Daniel Vetter <daniel@xxxxxxxx> wrote:
> On Thu, Dec 04, 2014 at 12:59:07PM -0800, Jesse Barnes wrote:
>> On Mon,  1 Dec 2014 09:54:28 -0800
>> Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> wrote:
>> 
>> > Partial revert of
>> > 
>> > commit 206645910b9796bff13fcdb67bdca166b724ba62
>> > Author: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
>> > Date:   Wed Nov 5 14:26:09 2014 -0800
>> > 
>> >     drm/i915: check for audio and infoframe changes across mode sets
>> > v2
>> > 
>> > References: https://bugs.freedesktop.org/show_bug.cgi?id=86683
>> > Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
>> > ---
>> >  drivers/gpu/drm/i915/intel_display.c | 10 ++++++----
>> >  1 file changed, 6 insertions(+), 4 deletions(-)
>> > 
>> > diff --git a/drivers/gpu/drm/i915/intel_display.c
>> > b/drivers/gpu/drm/i915/intel_display.c index 42bcbea..fe27a2c 100644
>> > --- a/drivers/gpu/drm/i915/intel_display.c
>> > +++ b/drivers/gpu/drm/i915/intel_display.c
>> > @@ -11601,10 +11601,12 @@ static int intel_crtc_set_config(struct
>> > drm_mode_set *set) to_intel_crtc(set->crtc)->config.has_audio)
>> >  			config->mode_changed = true;
>> >  
>> > -		/* Force mode sets for any infoframe stuff */
>> > -		if (pipe_config->has_infoframe ||
>> > -		    to_intel_crtc(set->crtc)->config.has_infoframe)
>> > -			config->mode_changed = true;
>> > +		/*
>> > +		 * Note we have an issue here with infoframes:
>> > current code
>> > +		 * only updates them on the full mode set path per hw
>> > +		 * requirements.  So here we should be checking for
>> > any
>> > +		 * required changes and forcing a mode set.
>> > +		 */
>> >  	}
>> >  
>> >  	/* set_mode will free it in the mode_changed case */
>> 
>> 
>> This got a tested-by from QA on the referenced bug, so I guess we
>> should pick it up as the revert.
>> 
>> Daniel?
>
> Sorry, fell through the cracks. Now it's for Jani to pick up since 3.20 is
> already split away. I've pinged him.

I've pushed this to drm-intel-next-queued last week. Thanks for the
patch.

BR,
Jani.


> -Daniel
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch

-- 
Jani Nikula, Intel Open Source Technology Center
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