[PATCH 3/4] drm/msm/dpu: use PINGPONG_NONE for LMs with no PP attached

[Marijn Suijten]

On 2023-04-30 23:35:55, Dmitry Baryshkov wrote:
> On msm8998/sdm845 some LM blocks do not have corresponding PINGPONG
> block. Currently the driver uses PINGPONG_MAX for such cases. Switch
> that to use PINGPONG_NONE instead, which is more logical.

dpu_lm_cfg::pingpong still has a doc-comment stating that PINGPONG_MAX
is to be used if this is unsupported, that should be updated to read
PINGPONG_NONE as well.

> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

Good cleanup otherwise:

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

> ---
>  drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_3_0_msm8998.h | 4 ++--
>  drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_4_0_sdm845.h  | 4 ++--
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h             | 3 ++-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c                  | 2 +-
>  4 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_3_0_msm8998.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_3_0_msm8998.h
> index bdcd554fc8a8..6ae30f806ebc 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_3_0_msm8998.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_3_0_msm8998.h
> @@ -104,9 +104,9 @@ static const struct dpu_lm_cfg msm8998_lm[] = {
>  	LM_BLK("lm_2", LM_2, 0x46000, MIXER_MSM8998_MASK,
>  		&msm8998_lm_sblk, PINGPONG_2, LM_5, 0),
>  	LM_BLK("lm_3", LM_3, 0x47000, MIXER_MSM8998_MASK,
> -		&msm8998_lm_sblk, PINGPONG_MAX, 0, 0),
> +		&msm8998_lm_sblk, PINGPONG_NONE, 0, 0),
>  	LM_BLK("lm_4", LM_4, 0x48000, MIXER_MSM8998_MASK,
> -		&msm8998_lm_sblk, PINGPONG_MAX, 0, 0),
> +		&msm8998_lm_sblk, PINGPONG_NONE, 0, 0),
>  	LM_BLK("lm_5", LM_5, 0x49000, MIXER_MSM8998_MASK,
>  		&msm8998_lm_sblk, PINGPONG_3, LM_2, 0),
>  };
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_4_0_sdm845.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_4_0_sdm845.h
> index ceca741e93c9..4a94fd9b64a9 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_4_0_sdm845.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_4_0_sdm845.h
> @@ -102,9 +102,9 @@ static const struct dpu_lm_cfg sdm845_lm[] = {
>  	LM_BLK("lm_2", LM_2, 0x46000, MIXER_SDM845_MASK,
>  		&sdm845_lm_sblk, PINGPONG_2, LM_5, 0),
>  	LM_BLK("lm_3", LM_3, 0x0, MIXER_SDM845_MASK,
> -		&sdm845_lm_sblk, PINGPONG_MAX, 0, 0),
> +		&sdm845_lm_sblk, PINGPONG_NONE, 0, 0),
>  	LM_BLK("lm_4", LM_4, 0x0, MIXER_SDM845_MASK,
> -		&sdm845_lm_sblk, PINGPONG_MAX, 0, 0),
> +		&sdm845_lm_sblk, PINGPONG_NONE, 0, 0),
>  	LM_BLK("lm_5", LM_5, 0x49000, MIXER_SDM845_MASK,
>  		&sdm845_lm_sblk, PINGPONG_3, LM_2, 0),
>  };
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
> index 2d9192a6ce00..56826a92c155 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
> @@ -191,7 +191,8 @@ enum dpu_dsc {
>  };
>  
>  enum dpu_pingpong {
> -	PINGPONG_0 = 1,
> +	PINGPONG_NONE,
> +	PINGPONG_0,
>  	PINGPONG_1,
>  	PINGPONG_2,
>  	PINGPONG_3,
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> index d5a06628885e..bf7b8e7c45b1 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> @@ -117,7 +117,7 @@ int dpu_rm_init(struct dpu_rm *rm,
>  		struct dpu_hw_mixer *hw;
>  		const struct dpu_lm_cfg *lm = &cat->mixer[i];
>  
> -		if (lm->pingpong == PINGPONG_MAX) {
> +		if (lm->pingpong == PINGPONG_NONE) {
>  			DPU_DEBUG("skip mixer %d without pingpong\n", lm->id);
>  			continue;
>  		}
> -- 
> 2.39.2
>