diff options
| author |   Geert Uytterhoeven <geert@linux-m68k.org> | 2022-07-08 20:20:53 +0200 |
|---|---|---|
| committer |   Sam Ravnborg <sam@ravnborg.org> | 2022-07-09 15:08:45 +0200 |
| commit | 8aba4d30520ed656065eb36f0628109bdea385ee (patch) | |
| tree | 548417ccd32adc4b61c59f3f5da30b071900cc38 /include/uapi/drm/drm_fourcc.h | |
| parent | drm/gem-fb-helper: Use actual bpp for size calculations (diff) | |
| download | linux-dev-8aba4d30520ed656065eb36f0628109bdea385ee.tar.xz linux-dev-8aba4d30520ed656065eb36f0628109bdea385ee.zip | |
drm/fourcc: Clarify the meaning of single-channel "red"
Traditionally, the first channel has been called the "red" channel, but
the fourcc values for single-channel "red" formats can also be used for
other single-channel formats with a direct relationship between channel
value and brightness, like grayscale.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/31d1792f26707a7270347e9916b4103470d2b192.1657294931.git.geert@linux-m68k.org
Diffstat (limited to 'include/uapi/drm/drm_fourcc.h')
| -rw-r--r-- | include/uapi/drm/drm_fourcc.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index b9c746c3ebbc..9521057701c4 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -104,16 +104,16 @@ extern "C" { #define DRM_FORMAT_C4 fourcc_code('C', '4', ' ', ' ') /* [7:0] C0:C1 4:4 two pixels/byte */ #define DRM_FORMAT_C8 fourcc_code('C', '8', ' ', ' ') /* [7:0] C */ -/* 8 bpp Red */ +/* 8 bpp Red (direct relationship between channel value and brightness) */ #define DRM_FORMAT_R8 fourcc_code('R', '8', ' ', ' ') /* [7:0] R */ -/* 10 bpp Red */ +/* 10 bpp Red (direct relationship between channel value and brightness) */ #define DRM_FORMAT_R10 fourcc_code('R', '1', '0', ' ') /* [15:0] x:R 6:10 little endian */ -/* 12 bpp Red */ +/* 12 bpp Red (direct relationship between channel value and brightness) */ #define DRM_FORMAT_R12 fourcc_code('R', '1', '2', ' ') /* [15:0] x:R 4:12 little endian */ -/* 16 bpp Red */ +/* 16 bpp Red (direct relationship between channel value and brightness) */ #define DRM_FORMAT_R16 fourcc_code('R', '1', '6', ' ') /* [15:0] R little endian */ /* 16 bpp RG */ |