Add checking if a modifier is afbc and getting afbc block size.
Signed-off-by: Andrzej Pietrasiewicz andrzej.p@collabora.com --- drivers/gpu/drm/drm_fourcc.c | 53 ++++++++++++++++++++++++++++++++++++ include/drm/drm_fourcc.h | 4 +++ 2 files changed, 57 insertions(+)
diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index b234bfaeda06..d14dd7c86020 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -29,6 +29,7 @@
#include <drm/drm_device.h> #include <drm/drm_fourcc.h> +#include <drm/drm_print.h>
static char printable_char(int c) { @@ -393,3 +394,55 @@ uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, drm_format_info_block_height(info, plane)); } EXPORT_SYMBOL(drm_format_info_min_pitch); + +/** + * drm_is_afbc - test if the modifier describes an afbc buffer + * @modifier - modifier to be tested + * + * Returns: true if the modifier describes an afbc buffer + */ +bool drm_is_afbc(u64 modifier) +{ + /* is it ARM AFBC? */ + if ((modifier & DRM_FORMAT_MOD_ARM_AFBC(0)) == 0) + return false; + + /* Block size must be known */ + if ((modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) == 0) + return false; + + return true; +} +EXPORT_SYMBOL_GPL(drm_is_afbc); + +/** + * drm_afbc_get_superblock_wh - extract afbc block width/height from modifier + * @modifier: the modifier to be looked at + * @w: address of a place to store the block width + * @h: address of a place to store the block height + * + * Returns: true if the modifier describes a supported block size + */ +bool drm_afbc_get_superblock_wh(u64 modifier, u32 *w, u32 *h) +{ + switch (modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) { + case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16: + *w = 16; + *h = 16; + break; + case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8: + *w = 32; + *h = 8; + break; + case AFBC_FORMAT_MOD_BLOCK_SIZE_64x4: + /* fall through */ + case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8_64x4: + /* fall through */ + default: + DRM_DEBUG_KMS("Invalid AFBC_FORMAT_MOD_BLOCK_SIZE: %lld.\n", + modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK); + return false; + } + return true; +} +EXPORT_SYMBOL_GPL(drm_afbc_get_superblock_wh); diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 306d1efeb5e0..7eb23062bf45 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -320,4 +320,8 @@ uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, int plane, unsigned int buffer_width); const char *drm_get_format_name(uint32_t format, struct drm_format_name_buf *buf);
+bool drm_is_afbc(u64 modifier); + +bool drm_afbc_get_superblock_wh(u64 modifier, u32 *w, u32 *h); + #endif /* __DRM_FOURCC_H__ */