linux-kernel - Re: [REPOST PATCH v4 08/13] drm/msm/disp/dpu1: Don't use DSC with mode

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Message-ID: <3035968b-8323-5380-afe3-4ddcc1ca65c4@linaro.org>
Date:   Thu, 10 Feb 2022 13:55:27 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>, Rob Clark <robdclark@...il.com>
Cc:     linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jonathan Marek <jonathan@...ek.ca>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org
Subject: Re: [REPOST PATCH v4 08/13] drm/msm/disp/dpu1: Don't use DSC with
 mode_3d

On 10/02/2022 13:34, Vinod Koul wrote:
> We cannot enable mode_3d when we are using the DSC. So pass
> configuration to detect DSC is enabled and not enable mode_3d
> when we are using DSC
> 
> We add a helper dpu_encoder_helper_get_dsc() to detect dsc
> enabled and pass this to .setup_intf_cfg()
> 
> Signed-off-by: Vinod Koul <vkoul@...nel.org>

You seem to insist on this.
Ok, lets agree that you did not test any other topologies and let 
anybody adding support for SDE_RM_TOPOLOGY_DUALPIPE_3DMERGE_DSC handle this.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 4 ++++
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 4 ++++
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c           | 7 ++++++-
>   3 files changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> index 34a6940d12c5..ed37a4c21596 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> @@ -70,6 +70,10 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
>   	intf_cfg.intf_mode_sel = DPU_CTL_MODE_SEL_CMD;
>   	intf_cfg.stream_sel = cmd_enc->stream_sel;
>   	intf_cfg.mode_3d = dpu_encoder_helper_get_3d_blend_mode(phys_enc);
> +	intf_cfg.dsc = dpu_encoder_helper_get_dsc(phys_enc);
> +	if (intf_cfg.dsc)
> +		intf_cfg.mode_3d = 0;
> +
>   	ctl->ops.setup_intf_cfg(ctl, &intf_cfg);
>   }
>   
> 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 ddd9d89cd456..218009855fca 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
> @@ -284,6 +284,10 @@ static void dpu_encoder_phys_vid_setup_timing_engine(
>   	intf_cfg.intf_mode_sel = DPU_CTL_MODE_SEL_VID;
>   	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 (intf_cfg.dsc)
> +		intf_cfg.mode_3d = 0;
> +
>   	if (phys_enc->hw_pp->merge_3d)
>   		intf_cfg.merge_3d = phys_enc->hw_pp->merge_3d->idx;
>   
> 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 49659165cea8..6d5268b7da90 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> @@ -536,7 +536,12 @@ static void dpu_hw_ctl_intf_cfg(struct dpu_hw_ctl *ctx,
>   
>   	intf_cfg |= (cfg->intf & 0xF) << 4;
>   
> -	if (cfg->mode_3d) {
> +	/* In DSC we can't set merge, so check for dsc and complain */
> +	if (cfg->mode_3d && cfg->dsc)
> +		pr_err("DPU1: DSC and Merge 3D both are set!! it may not work\n");
> +
> +	/* set merge only when dsc is not set */
> +	if (cfg->mode_3d && !cfg->dsc) {
>   		intf_cfg |= BIT(19);
>   		intf_cfg |= (cfg->mode_3d - 0x1) << 20;
>   	}


-- 
With best wishes
Dmitry