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Date:   Wed, 19 Apr 2023 16:41:11 +0200
From:   Arnaud Vrac <avrac@...ebox.fr>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Arnaud Vrac <avrac@...ebox.fr>
Subject: [PATCH 04/11] drm/msm/dpu: allow using lm mixer base stage

The dpu backend already handles applying alpha to the base stage, so we
can use it to render the bottom plane in all cases. This allows mixing
one additional plane with the hardware mixer.

Signed-off-by: Arnaud Vrac <avrac@...ebox.fr>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 14b5cfe306113..148921ed62f85 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -881,7 +881,7 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 	r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
 	r_pipe->sspp = NULL;
 
-	pstate->stage = DPU_STAGE_0 + pstate->base.normalized_zpos;
+	pstate->stage = DPU_STAGE_BASE + pstate->base.normalized_zpos;
 	if (pstate->stage >= pdpu->catalog->caps->max_mixer_blendstages) {
 		DPU_ERROR("> %d plane stages assigned\n",
 			  pdpu->catalog->caps->max_mixer_blendstages - DPU_STAGE_0);

-- 
2.40.0

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