Re: [PATCH 1/2] drm/msm/dpu: do not enable color-management if DSPPs are not available

From: Marijn Suijten <marijn.suijten@somainline.org>
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	Stephen Boyd <swboyd@chromium.org>,
	David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
	Bjorn Andersson <andersson@kernel.org>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org,
	Yongqin Liu <yongqin.liu@linaro.org>
Subject: Re: [PATCH 1/2] drm/msm/dpu: do not enable color-management if DSPPs are not available
Date: Tue, 13 Jun 2023 01:09:11 +0200	[thread overview]
Message-ID: <dbt3zbvagd4vrrrvpjokshebiebjaes77lvjv5ithsxggcdlrj@ce4l2ykex7bm> (raw)
In-Reply-To: <20230612182534.3345805-1-dmitry.baryshkov@linaro.org>

On 2023-06-12 21:25:33, Dmitry Baryshkov wrote:
> We can not support color management without DSPP blocks being provided
> in the HW catalog. Do not enable color management for CRTCs if num_dspps
> is 0.
> 
> Fixes: 4259ff7ae509 ("drm/msm/dpu: add support for pcc color block in dpu driver")
> Reported-by: Yongqin Liu <yongqin.liu@linaro.org>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Yep, this indeed makes the CTM blob property disappear from the CRTC
resource:

Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> index 6e684a7b49a1..1edf2b6b0a26 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> @@ -1463,6 +1463,8 @@ static const struct drm_crtc_helper_funcs dpu_crtc_helper_funcs = {
>  struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
>  				struct drm_plane *cursor)
>  {
> +	struct msm_drm_private *priv = dev->dev_private;
> +	struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms);
>  	struct drm_crtc *crtc = NULL;
>  	struct dpu_crtc *dpu_crtc = NULL;
>  	int i, ret;
> @@ -1494,7 +1496,8 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
>  
>  	drm_crtc_helper_add(crtc, &dpu_crtc_helper_funcs);
>  
> -	drm_crtc_enable_color_mgmt(crtc, 0, true, 0);
> +	if (dpu_kms->catalog->dspp_count)
> +		drm_crtc_enable_color_mgmt(crtc, 0, true, 0);
>  
>  	/* save user friendly CRTC name for later */
>  	snprintf(dpu_crtc->name, DPU_CRTC_NAME_SIZE, "crtc%u", crtc->base.id);
> -- 
> 2.39.2
> 