diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fourcc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fourcc.c | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index 8aaa5e86a979..d90ee03a84c6 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -103,8 +103,8 @@ EXPORT_SYMBOL(drm_mode_legacy_fb_format); * * Computes a drm fourcc pixel format code for the given @bpp/@depth values. * Unlike drm_mode_legacy_fb_format() this looks at the drivers mode_config, - * and depending on the quirk_addfb_prefer_host_byte_order flag it returns - * little endian byte order or host byte order framebuffer formats. + * and depending on the &drm_mode_config.quirk_addfb_prefer_host_byte_order flag + * it returns little endian byte order or host byte order framebuffer formats. */ uint32_t drm_driver_legacy_fb_format(struct drm_device *dev, uint32_t bpp, uint32_t depth) @@ -224,7 +224,20 @@ const struct drm_format_info *__drm_format_info(u32 format) { .format = DRM_FORMAT_YVYU, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, { .format = DRM_FORMAT_UYVY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, { .format = DRM_FORMAT_VYUY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, + { .format = DRM_FORMAT_XYUV8888, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, { .format = DRM_FORMAT_AYUV, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, + { .format = DRM_FORMAT_Y0L0, .depth = 0, .num_planes = 1, + .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, + .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true }, + { .format = DRM_FORMAT_X0L0, .depth = 0, .num_planes = 1, + .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, + .hsub = 2, .vsub = 2, .is_yuv = true }, + { .format = DRM_FORMAT_Y0L2, .depth = 0, .num_planes = 1, + .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, + .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true }, + { .format = DRM_FORMAT_X0L2, .depth = 0, .num_planes = 1, + .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, + .hsub = 2, .vsub = 2, .is_yuv = true }, }; unsigned int i; @@ -400,3 +413,65 @@ int drm_format_plane_height(int height, uint32_t format, int plane) return height / info->vsub; } EXPORT_SYMBOL(drm_format_plane_height); + +/** + * drm_format_info_block_width - width in pixels of block. + * @info: pixel format info + * @plane: plane index + * + * Returns: + * The width in pixels of a block, depending on the plane index. + */ +unsigned int drm_format_info_block_width(const struct drm_format_info *info, + int plane) +{ + if (!info || plane < 0 || plane >= info->num_planes) + return 0; + + if (!info->block_w[plane]) + return 1; + return info->block_w[plane]; +} +EXPORT_SYMBOL(drm_format_info_block_width); + +/** + * drm_format_info_block_height - height in pixels of a block + * @info: pixel format info + * @plane: plane index + * + * Returns: + * The height in pixels of a block, depending on the plane index. + */ +unsigned int drm_format_info_block_height(const struct drm_format_info *info, + int plane) +{ + if (!info || plane < 0 || plane >= info->num_planes) + return 0; + + if (!info->block_h[plane]) + return 1; + return info->block_h[plane]; +} +EXPORT_SYMBOL(drm_format_info_block_height); + +/** + * drm_format_info_min_pitch - computes the minimum required pitch in bytes + * @info: pixel format info + * @plane: plane index + * @buffer_width: buffer width in pixels + * + * Returns: + * The minimum required pitch in bytes for a buffer by taking into consideration + * the pixel format information and the buffer width. + */ +uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, + int plane, unsigned int buffer_width) +{ + if (!info || plane < 0 || plane >= info->num_planes) + return 0; + + return DIV_ROUND_UP_ULL((u64)buffer_width * info->char_per_block[plane], + drm_format_info_block_width(info, plane) * + drm_format_info_block_height(info, plane)); +} +EXPORT_SYMBOL(drm_format_info_min_pitch); |