On Fri, 2022-05-06 at 08:48 +0300, Jouni Högander wrote:
> Currently we have some corner cases where area calculation fails.  For
> these sel fetch are calculation ends up having update area as y1 = 0,
> y2 = 4. Instead of these values safer option is full update.

Aren't you able to reproduce this scenarios with IGT? So why not probably fix 
the calculations?

> 
> Cc: José Roberto de Souza <jose.so...@intel.com>
> Cc: Mika Kahola <mika.kah...@intel.com>
> Tested-by: Mark Pearson <markpear...@lenovo.com>
> Signed-off-by: Jouni Högander <jouni.hogan...@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_psr.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c 
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index 06db407e2749..8c099d24de86 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -1770,6 +1770,9 @@ int intel_psr2_sel_fetch_update(struct 
> intel_atomic_state *state,
>               clip_area_update(&pipe_clip, &damaged_area);
>       }
>  
> +     if (pipe_clip.y1 == -1)
> +             full_update = true;
> +
>       if (full_update)
>               goto skip_sel_fetch_set_loop;
>  

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