[Intel-gfx] [PATCH v3 3/3] drm/i915/display/psr: Do full fetch when handling biplanar formats

[Manna, Animesh]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of José
> Roberto de Souza
> Sent: Tuesday, September 21, 2021 6:11 AM
> To: intel-gfx at lists.freedesktop.org
> Cc: Mun, Gwan-gyeong <gwan-gyeong.mun at intel.com>; Souza, Jose
> <jose.souza at intel.com>
> Subject: [Intel-gfx] [PATCH v3 3/3] drm/i915/display/psr: Do full fetch when
> handling biplanar formats
> 
> From: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
> 
> We are still missing the PSR2 selective fetch handling of biplanar formats but
> until proper handle is added we can workaround it by doing full frames fetch
> when state has biplanar formats.
> 
> We need the second check because an update in a regular format could
> intersect with a biplanar plane that was not initialy part of the atomic commit.
> 
> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_psr.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index 8ceb22c5a1a6b..e6a4c27975d8c 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -1601,9 +1601,13 @@ int intel_psr2_sel_fetch_update(struct
> intel_atomic_state *state,
>  		 * TODO: Not clear how to handle planes with negative
> position,
>  		 * also planes are not updated if they have a negative X
>  		 * position so for now doing a full update in this cases
> +		 *
> +		 * TODO: We are missing biplanar formats handling, until it is
> +		 * implemented it will send full frame updates.
>  		 */
>  		if (new_plane_state->uapi.dst.y1 < 0 ||
> -		    new_plane_state->uapi.dst.x1 < 0) {
> +		    new_plane_state->uapi.dst.x1 < 0 ||
> +		    new_plane_state->hw.fb->format->is_yuv) {
>  			full_update = true;
>  			break;
>  		}
> @@ -1682,6 +1686,11 @@ int intel_psr2_sel_fetch_update(struct
> intel_atomic_state *state,
>  		if (!drm_rect_intersect(&inter, &new_plane_state->uapi.dst))
>  			continue;
> 

Code comment can be added here why we need this check again in same function.
Enabling full frame update is fine for me for planar format but not sure we need the 2nd check.

Regards,
Animesh

> +		if (new_plane_state->hw.fb->format->is_yuv) {
> +			full_update = true;
> +			break;
> +		}
> +
>  		sel_fetch_area = &new_plane_state->psr2_sel_fetch_area;
>  		sel_fetch_area->y1 = inter.y1 - new_plane_state->uapi.dst.y1;
>  		sel_fetch_area->y2 = inter.y2 - new_plane_state->uapi.dst.y1;
> --
> 2.33.0