[Freedreno] [PATCH v4 2/4] drm/msm/mdss: Rename path references to mdp_path

[Abhinav Kumar]

On 12/2/2023 2:42 PM, Dmitry Baryshkov wrote:
> From: Konrad Dybcio <konrad.dybcio at linaro.org>
> 
> The DPU1 driver needs to handle all MDPn<->DDR paths, as well as
> CPU<->SLAVE_DISPLAY_CFG. The former ones share how their values are
> calculated, but the latter one has static predefines spanning all SoCs.
> 
> In preparation for supporting the CPU<->SLAVE_DISPLAY_CFG path, rename
> the path-related struct members to include "mdp_".
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio at linaro.org>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

Minor nits and I am fine to fix them now or later as they existed even 
before this patch,

1) we can just have num_mdp_paths++ in both places instead of setting to 
1 and then increment.

2) Maybe some macro like MAX_MDP_ICC_PATH instead of 2 will be better.

3) Wondering whether we even need a num_path/num_mdp_path and just use 
ARRAY_SIZE for the loop and then check if (mdp_path) OR even better if 
icc has some sort of bulk_set_bw with num of paths.

Nothing these down but nothing to block this patch:

Reviewed-by: Abhinav Kumar <quic_abhinavk at quicinc.com>

> ---
>   drivers/gpu/drm/msm/msm_mdss.c | 16 ++++++++--------
>   1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c
> index 53bc496ace99..e1b208fd072e 100644
> --- a/drivers/gpu/drm/msm/msm_mdss.c
> +++ b/drivers/gpu/drm/msm/msm_mdss.c
> @@ -40,8 +40,8 @@ struct msm_mdss {
>   		struct irq_domain *domain;
>   	} irq_controller;
>   	const struct msm_mdss_data *mdss_data;
> -	struct icc_path *path[2];
> -	u32 num_paths;
> +	struct icc_path *mdp_path[2];
> +	u32 num_mdp_paths;
>   };
>   
>   static int msm_mdss_parse_data_bus_icc_path(struct device *dev,
> @@ -54,13 +54,13 @@ static int msm_mdss_parse_data_bus_icc_path(struct device *dev,
>   	if (IS_ERR_OR_NULL(path0))
>   		return PTR_ERR_OR_ZERO(path0);
>   
> -	msm_mdss->path[0] = path0;
> -	msm_mdss->num_paths = 1;
> +	msm_mdss->mdp_path[0] = path0;
> +	msm_mdss->num_mdp_paths = 1;
>   
>   	path1 = devm_of_icc_get(dev, "mdp1-mem");
>   	if (!IS_ERR_OR_NULL(path1)) {
> -		msm_mdss->path[1] = path1;
> -		msm_mdss->num_paths++;
> +		msm_mdss->mdp_path[1] = path1;
> +		msm_mdss->num_mdp_paths++;
>   	}
>   
>   	return 0;
> @@ -70,8 +70,8 @@ static void msm_mdss_icc_request_bw(struct msm_mdss *msm_mdss, unsigned long bw)
>   {
>   	int i;
>   
> -	for (i = 0; i < msm_mdss->num_paths; i++)
> -		icc_set_bw(msm_mdss->path[i], 0, Bps_to_icc(bw));
> +	for (i = 0; i < msm_mdss->num_mdp_paths; i++)
> +		icc_set_bw(msm_mdss->mdp_path[i], 0, Bps_to_icc(bw));
>   }
>   
>   static void msm_mdss_irq(struct irq_desc *desc)