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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2021-07-30 20:35:07 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2021-08-02 16:41:20 +0200 |
| commit | 279cc2e9543eb357c0ef299cf398b2e74a021f6b (patch) | |
| tree | d6eb3e98a92f55835f0bff7ea8c1b9c363d554ec /include/drm/drm_fourcc.h | |
| parent | 6e5b47a4f1dde38d42b054cc6d16b6840de08bd2 (diff) | |
| download | linux-279cc2e9543eb357c0ef299cf398b2e74a021f6b.tar.gz | |
drm: Define DRM_FORMAT_MAX_PLANES
DRM uses a magic number of 4 for the maximum number of planes per color
format. Declare this constant via DRM_FORMAT_MAX_PLANES and update the
related code. Some code depends on the length of arrays that are now
declared with DRM_FORMAT_MAX_PLANES. Convert it from '4' to ARRAY_SIZE.
v2:
* mention usage of ARRAY_SIZE() in the commit message (Maxime)
* also fix error handling in drm_gem_fb_init_with_funcs()
(kernel test robot)
* include <drm/drm_fourcc.h> for DRM_FORMAT_MAX_PLANES
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-2-tzimmermann@suse.de
Diffstat (limited to 'include/drm/drm_fourcc.h')
| -rw-r--r-- | include/drm/drm_fourcc.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 3b138d4ae67e..22aa64d07c79 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -25,6 +25,11 @@ #include <linux/types.h> #include <uapi/drm/drm_fourcc.h> +/** + * DRM_FORMAT_MAX_PLANES - maximum number of planes a DRM format can have + */ +#define DRM_FORMAT_MAX_PLANES 4u + /* * DRM formats are little endian. Define host endian variants for the * most common formats here, to reduce the #ifdefs needed in drivers. @@ -78,7 +83,7 @@ struct drm_format_info { * triplet @char_per_block, @block_w, @block_h for better * describing the pixel format. */ - u8 cpp[4]; + u8 cpp[DRM_FORMAT_MAX_PLANES]; /** * @char_per_block: @@ -104,7 +109,7 @@ struct drm_format_info { * information from their drm_mode_config.get_format_info hook * if they want the core to be validating the pitch. */ - u8 char_per_block[4]; + u8 char_per_block[DRM_FORMAT_MAX_PLANES]; }; /** @@ -113,7 +118,7 @@ struct drm_format_info { * Block width in pixels, this is intended to be accessed through * drm_format_info_block_width() */ - u8 block_w[4]; + u8 block_w[DRM_FORMAT_MAX_PLANES]; /** * @block_h: @@ -121,7 +126,7 @@ struct drm_format_info { * Block height in pixels, this is intended to be accessed through * drm_format_info_block_height() */ - u8 block_h[4]; + u8 block_h[DRM_FORMAT_MAX_PLANES]; /** @hsub: Horizontal chroma subsampling factor */ u8 hsub; |