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Commit 2db8ebca authored by Matteo Franchin's avatar Matteo Franchin Committed by Ayan Kumar Halder
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drm/fourcc: Add modifier defininitions for AFBC 1.3 



This commit adds definitions of format modifiers for version 1.3 of the
Arm Framebuffer Compression (AFBC).

Signed-off-by: default avatarMatteo Franchin <matteo.franchin@arm.com>
Signed-off-by: default avatarAyan Kumar Halder <ayan.halder@arm.com>
Reviewed-by: default avatarBrian Starkey <brian.starkey@arm.com>
Link: https://patchwork.freedesktop.org/patch/277333/
parent ed20151a

include/uapi/drm/drm_fourcc.h

+23 −0
Original line number Diff line number Diff line
@@ -581,10 +581,18 @@ extern "C" { 
 * Indicates the superblock size(s) used for the AFBC buffer. The buffer

 * size (in pixels) must be aligned to a multiple of the superblock size.

 * Four lowest significant bits(LSBs) are reserved for block size.

 *

 * Where one superblock size is specified, it applies to all planes of the

 * buffer (e.g. 16x16, 32x8). When multiple superblock sizes are specified,

 * the first applies to the Luma plane and the second applies to the Chroma

 * plane(s). e.g. (32x8_64x4 means 32x8 Luma, with 64x4 Chroma).

 * Multiple superblock sizes are only valid for multi-plane YCbCr formats.

 */

#define AFBC_FORMAT_MOD_BLOCK_SIZE_MASK      0xf

#define AFBC_FORMAT_MOD_BLOCK_SIZE_16x16     (1ULL)

#define AFBC_FORMAT_MOD_BLOCK_SIZE_32x8      (2ULL)

#define AFBC_FORMAT_MOD_BLOCK_SIZE_64x4      (3ULL)

#define AFBC_FORMAT_MOD_BLOCK_SIZE_32x8_64x4 (4ULL)



/*

 * AFBC lossless colorspace transform
@@ -644,6 +652,21 @@ extern "C" { 
 */

#define AFBC_FORMAT_MOD_SC      (1ULL <<  9)



/*

 * AFBC double-buffer

 *

 * Indicates that the buffer is allocated in a layout safe for front-buffer

 * rendering.

 */

#define AFBC_FORMAT_MOD_DB      (1ULL << 10)



/*

 * AFBC buffer content hints

 *

 * Indicates that the buffer includes per-superblock content hints.

 */

#define AFBC_FORMAT_MOD_BCH     (1ULL << 11)



#if defined(__cplusplus)

}

#endif