linux-kernel - Re: [PATCH v3] drm/client: Convert drm_client_buffer_addfb() to drm_mode

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Date:   Tue, 24 Oct 2023 12:33:23 -0400
From:   Hamza Mahfooz <hamza.mahfooz@....com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Javier Martinez Canillas <javierm@...hat.com>
Subject: Re: [PATCH v3] drm/client: Convert drm_client_buffer_addfb() to
 drm_mode_addfb2()

On 10/15/23 10:27, Geert Uytterhoeven wrote:
> Currently drm_client_buffer_addfb() uses the legacy drm_mode_addfb(),
> which uses bpp and depth to guess the wanted buffer format.
> However, drm_client_buffer_addfb() already knows the exact buffer
> format, so there is no need to convert back and forth between buffer
> format and bpp/depth, and the function can just call drm_mode_addfb2()
> directly instead.
> 
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>
> Tested-by: Javier Martinez Canillas <javierm@...hat.com>

Applied and pushed to drm-misc-next, thanks!

> ---
> v3:
>    - Extract from series "[PATCH v2 0/8] drm: fb-helper/ssd130x: Add
>      support for DRM_FORMAT_R1"
>      (https://lore.kernel.org/all/cover.1692888745.git.geert@linux-m68k.org),
>      as this patch has merits on its own,
> v2:
>    - Add Reviewed-by, Tested-by,
>    - s/drm_mode_create_dumb/drm_client_buffer_addfb/ in one-line summary.
> ---
>   drivers/gpu/drm/drm_client.c | 13 +++++--------
>   1 file changed, 5 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
> index d4296440f297fc5a..a780832a0963fe38 100644
> --- a/drivers/gpu/drm/drm_client.c
> +++ b/drivers/gpu/drm/drm_client.c
> @@ -395,19 +395,16 @@ static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,
>   				   u32 handle)
>   {
>   	struct drm_client_dev *client = buffer->client;
> -	struct drm_mode_fb_cmd fb_req = { };
> -	const struct drm_format_info *info;
> +	struct drm_mode_fb_cmd2 fb_req = { };
>   	int ret;
>   
> -	info = drm_format_info(format);
> -	fb_req.bpp = drm_format_info_bpp(info, 0);
> -	fb_req.depth = info->depth;
>   	fb_req.width = width;
>   	fb_req.height = height;
> -	fb_req.handle = handle;
> -	fb_req.pitch = buffer->pitch;
> +	fb_req.pixel_format = format;
> +	fb_req.handles[0] = handle;
> +	fb_req.pitches[0] = buffer->pitch;
>   
> -	ret = drm_mode_addfb(client->dev, &fb_req, client->file);
> +	ret = drm_mode_addfb2(client->dev, &fb_req, client->file);
>   	if (ret)
>   		return ret;
>   
-- 
Hamza