[PATCH v2] drm/msm/dpu: don't always activate merge_3d block

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Only enable the merge_3d block for the video phys encoder when the 3d
blend mode is not *_NONE since there is no need to activate the merge_3d
block for cases where merge_3d is not needed.

Fixes: 3e79527a33a8 ("drm/msm/dpu: enable merge_3d support on sm8150/sm8250")
Suggested-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
Changes in v2:
- Added more detailed commit message
- Link to v1: https://lore.kernel.org/r/20241009-merge3d-fix-v1-1-0d0b6f5c244e@xxxxxxxxxxx
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
index ba8878d21cf0e1945a393cca806cb64f03b16640..c5e27eeaff0423a69fad98122ffef7e041fbc68e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
@@ -302,7 +302,7 @@ static void dpu_encoder_phys_vid_setup_timing_engine(
 	intf_cfg.stream_sel = 0; /* Don't care value for video mode */
 	intf_cfg.mode_3d = dpu_encoder_helper_get_3d_blend_mode(phys_enc);
 	intf_cfg.dsc = dpu_encoder_helper_get_dsc(phys_enc);
-	if (phys_enc->hw_pp->merge_3d)
+	if (intf_cfg.mode_3d && phys_enc->hw_pp->merge_3d)
 		intf_cfg.merge_3d = phys_enc->hw_pp->merge_3d->idx;
 
 	spin_lock_irqsave(phys_enc->enc_spinlock, lock_flags);

---
base-commit: a20a91fb1bfac5d05ec5bcf9afe0c9363f6c8c93
change-id: 20240828-merge3d-fix-1a8d005e3277

Best regards,
-- 
Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>




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