Re: [PATCH 10/15] drm/mediatek: Support CRC in display driver

[AngeloGioacchino Del Regno]

Il 23/08/23 17:13, Hsiao Chien Sung ha scritto:
> Register CRC related function pointers to support CRC
> retrieval.
>
> Skip the first CRC because when the first vblank triggered,
> the frame buffer is not ready for CRC calculation yet.
>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
> ---
>   drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 53 +++++++++++++++++++++
>   drivers/gpu/drm/mediatek/mtk_drm_crtc.h     | 20 ++++++++
>   drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  5 ++
>   3 files changed, 78 insertions(+)

..snip..

> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index febcaeef16a1..3b67c3dc0525 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -45,6 +45,10 @@ enum mtk_ddp_comp_type {
>   
>   struct mtk_ddp_comp;
>   struct cmdq_pkt;
> +
> +/* struct mtk_ddp_comp_funcs - function pointers of the ddp components

While at it, can you at this point just add kerneldoc for the entire structure?
That should be pretty straightforward, and just a 10 minutes job.

Thanks!
Angelo

> + * @crc_cnt: how many CRCs the component supports
> + */
>   struct mtk_ddp_comp_funcs {
>   	int (*clk_enable)(struct device *dev);
>   	void (*clk_disable)(struct device *dev);
> @@ -80,6 +84,7 @@ struct mtk_ddp_comp_funcs {
>   	void (*disconnect)(struct device *dev, struct device *mmsys_dev, unsigned int next);
>   	void (*add)(struct device *dev, struct mtk_mutex *mutex);
>   	void (*remove)(struct device *dev, struct mtk_mutex *mutex);
> +	u32 (*crc_cnt)(struct device *dev);
>   };
>