[PATCH 4.19 077/293] drm/msm/dpu: make dpu_hw_ctl_clear_all_blendstages clear necessary LMs

From: Greg Kroah-Hartman
Date: Mon Sep 20 2021 - 13:38:58 EST


From: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>

[ Upstream commit a41cdb693595ae1904dd793fc15d6954f4295e27 ]

dpu_hw_ctl_clear_all_blendstages() clears settings for the few first LMs
instead of mixers actually used for the CTL. Change it to clear
necessary data, using provided mixer ids.

Fixes: 25fdd5933e4c ("drm/msm: Add SDM845 DPU support")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210704230519.4081467-1-dmitry.baryshkov@xxxxxxxxxx
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
index 79bafea66354..a40ea5c68572 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
@@ -296,10 +296,12 @@ static void dpu_hw_ctl_clear_all_blendstages(struct dpu_hw_ctl *ctx)
int i;

for (i = 0; i < ctx->mixer_count; i++) {
- DPU_REG_WRITE(c, CTL_LAYER(LM_0 + i), 0);
- DPU_REG_WRITE(c, CTL_LAYER_EXT(LM_0 + i), 0);
- DPU_REG_WRITE(c, CTL_LAYER_EXT2(LM_0 + i), 0);
- DPU_REG_WRITE(c, CTL_LAYER_EXT3(LM_0 + i), 0);
+ enum dpu_lm mixer_id = ctx->mixer_hw_caps[i].id;
+
+ DPU_REG_WRITE(c, CTL_LAYER(mixer_id), 0);
+ DPU_REG_WRITE(c, CTL_LAYER_EXT(mixer_id), 0);
+ DPU_REG_WRITE(c, CTL_LAYER_EXT2(mixer_id), 0);
+ DPU_REG_WRITE(c, CTL_LAYER_EXT3(mixer_id), 0);
}
}

--
2.30.2