[Freedreno] [PATCH 19/25] drm/msm/dpu: don't use unsupported blend stages

[Abhinav Kumar]

On 2/9/2022 9:25 AM, Dmitry Baryshkov wrote:
> The atomic_check compares blending stage with DPU_STAGE_MAX (maximum
> amount of blending stages supported by the driver), however we should
> compare it against .max_mixer_blendstages, the maximum blend stage
> supported by the mixer.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

This seems reasonable to me,

Reviewed-by: Abhinav Kumar <quic_abhinavk at quicinc.com>

> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> index 637d164667e9..952ff11162c0 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> @@ -927,9 +927,9 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
>   	pstate->pipe.multirect_mode = DPU_SSPP_MULTIRECT_NONE;
>   
>   	pstate->stage = DPU_STAGE_0 + pstate->base.normalized_zpos;
> -	if (pstate->stage >= DPU_STAGE_MAX) {
> +	if (pstate->stage >= pdpu->catalog->caps->max_mixer_blendstages) {
>   		DPU_ERROR("> %d plane stages assigned\n",
> -				DPU_STAGE_MAX - DPU_STAGE_0);
> +				pdpu->catalog->caps->max_mixer_blendstages - DPU_STAGE_0);
>   		return -EINVAL;
>   	}
>