linux-kernel - Re: [PATCH v8 2/8] drm/mediatevk: Add crtc path enum for all_drm

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Message-ID: <38720b56-df8e-d25a-0e6f-ca6e1fb3df26@collabora.com>
Date:   Thu, 3 Aug 2023 16:18:12 +0300
From:   Eugen Hristev <eugen.hristev@...labora.com>
To:     "Jason-JH.Lin" <jason-jh.lin@...iatek.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Jason-ch Chen <jason-ch.chen@...iatek.com>,
        Johnson Wang <johnson.wang@...iatek.com>,
        Singo Chang <singo.chang@...iatek.com>,
        Nancy Lin <nancy.lin@...iatek.com>,
        Shawn Sung <shawn.sung@...iatek.com>,
        dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v8 2/8] drm/mediatevk: Add crtc path enum for all_drm_priv
 array

On 8/2/23 17:47, Jason-JH.Lin wrote:
> Add mtk_drm_crtc_path enum for eatch display path.

Typo: each

> 
> Instead of using array index of all_drm_priv in mtk_drm_kms_init(),
> mtk_drm_crtc_path enum can make more readable.

can make *code* more readable ?
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> ---
>   drivers/gpu/drm/mediatek/mtk_drm_drv.c | 6 +++---
>   drivers/gpu/drm/mediatek/mtk_drm_drv.h | 8 +++++++-
>   2 files changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 249c9fd6347e..89a38561ba27 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -465,21 +465,21 @@ static int mtk_drm_kms_init(struct drm_device *drm)
>   		for (j = 0; j < private->data->mmsys_dev_num; j++) {
>   			priv_n = private->all_drm_private[j];
>   
> -			if (i == 0 && priv_n->data->main_len) {
> +			if (i == CRTC_MAIN && priv_n->data->main_len) {
>   				ret = mtk_drm_crtc_create(drm, priv_n->data->main_path,
>   							  priv_n->data->main_len, j);
>   				if (ret)
>   					goto err_component_unbind;
>   
>   				continue;
> -			} else if (i == 1 && priv_n->data->ext_len) {
> +			} else if (i == CRTC_EXT && priv_n->data->ext_len) {
>   				ret = mtk_drm_crtc_create(drm, priv_n->data->ext_path,
>   							  priv_n->data->ext_len, j);
>   				if (ret)
>   					goto err_component_unbind;
>   
>   				continue;
> -			} else if (i == 2 && priv_n->data->third_len) {
> +			} else if (i == CRTC_THIRD && priv_n->data->third_len) {
>   				ret = mtk_drm_crtc_create(drm, priv_n->data->third_path,
>   							  priv_n->data->third_len, j);
>   				if (ret)
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index eb2fd45941f0..f4de8bb27685 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -9,11 +9,17 @@
>   #include <linux/io.h>
>   #include "mtk_drm_ddp_comp.h"
>   
> -#define MAX_CRTC	3
>   #define MAX_CONNECTOR	2
>   #define DDP_COMPONENT_DRM_OVL_ADAPTOR (DDP_COMPONENT_ID_MAX + 1)
>   #define DDP_COMPONENT_DRM_ID_MAX (DDP_COMPONENT_DRM_OVL_ADAPTOR + 1)
>   
> +enum mtk_drm_crtc_path {
> +	CRTC_MAIN,
> +	CRTC_EXT,
> +	CRTC_THIRD,
> +	MAX_CRTC,
> +};
> +
>   struct device;
>   struct device_node;
>   struct drm_crtc;