Re: [PATCH v2 07/14] drm/msm/dpu: bind correct pingpong for quad pipe

[Dmitry Baryshkov]

On Wed, Oct 09, 2024 at 04:50:20PM GMT, Jun Nie wrote:
> There are 2 interfaces and 4 pingpong in quad pipe. Map the 2nd
> interface to 3rd PP instead of the 2nd PP.
> 
> Signed-off-by: Jun Nie <jun.nie@xxxxxxxxxx>


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

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index bd2509985c4d0..dfe282c607933 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -1100,7 +1100,7 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
>  	struct dpu_hw_blk *hw_lm[MAX_CHANNELS_PER_ENC];
>  	struct dpu_hw_blk *hw_dspp[MAX_CHANNELS_PER_ENC] = { NULL };
>  	struct dpu_hw_blk *hw_dsc[MAX_CHANNELS_PER_ENC];
> -	int num_lm, num_ctl, num_pp, num_dsc;
> +	int num_lm, num_ctl, num_pp, num_dsc, num_pp_per_intf;
>  	unsigned int dsc_mask = 0;
>  	int i;
>  
> @@ -1171,9 +1171,14 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
>  
>  	cstate->num_dscs = num_dsc;
>  	cstate->num_mixers = num_lm;
> -

Nit: unrelated

>  	dpu_enc->connector = conn_state->connector;
>  
> +	/*
> +	 * There may be 4 PP and 2 INTF for quad pipe case, so INTF is not
> +	 * mapped to PP 1:1. Let's calculate the stride with pipe/INTF
> +	 */
> +	num_pp_per_intf = num_lm / dpu_enc->num_phys_encs;
> +
>  	for (i = 0; i < dpu_enc->num_phys_encs; i++) {
>  		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
>  		struct dpu_hw_ctl *ctl0 = to_dpu_hw_ctl(hw_ctl[0]);
> @@ -1195,7 +1200,7 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
>  			return;
>  		}
>  
> -		phys->hw_pp = dpu_enc->hw_pp[i];
> +		phys->hw_pp = dpu_enc->hw_pp[num_pp_per_intf * i];
>  
>  		phys->cached_mode = crtc_state->adjusted_mode;
>  		if (phys->ops.atomic_mode_set)
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry