linux-kernel - Re: [PATCH v2] drm/msm/dpu: don't always activate merge

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Message-ID: <kah73euzauizsxvcrgmfsatshfe4pytgb7xe5iprtajg7abhsv@l7jdcxza5gd2>
Date: Mon, 14 Oct 2024 03:20:19 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Jessica Zhang <quic_jesszhan@...cinc.com>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, quic_abhinavk@...cinc.com, Rob Clark <robdclark@...omium.org>, 
	linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/msm/dpu: don't always activate merge_3d block

On Fri, Oct 11, 2024 at 10:25:13AM -0700, Jessica Zhang wrote:
> 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@...cinc.com>
> Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
> ---
> Changes in v2:
> - Added more detailed commit message
> - Link to v1: https://lore.kernel.org/r/20241009-merge3d-fix-v1-1-0d0b6f5c244e@quicinc.com
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

LGTM now. Please clarify, is there any dependency between this patch and
[1]

[1] https://lore.kernel.org/dri-devel/20241009-mode3d-fix-v1-1-c0258354fadc@quicinc.com/

> 
> 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@...cinc.com>
> 

-- 
With best wishes
Dmitry