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

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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?
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