From: Matteo Franchin <matteo.franchin@xxxxxxx>
This commit adds definitions of format modifiers for version 1.3 of the
Arm Framebuffer Compression (AFBC).
Signed-off-by: Matteo Franchin <matteo.franchin@xxxxxxx>
---
include/uapi/drm/drm_fourcc.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 8dd1328..d6a20d4 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -602,10 +602,18 @@ 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
@@ -665,6 +673,21 @@ 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
--
2.7.4
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