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authorBen Davis <ben.davis@arm.com>2020-04-30 11:32:20 +0300
committerLiviu Dudau <Liviu.Dudau@arm.com>2020-06-19 15:35:24 +0300
commit79ce058032c391b12af928b1e30abf92482a270f (patch)
treef5e8871187983f070d41e968a1da044f5442178d
parent94b292b277343190175d39172c903c0c5fb814f1 (diff)
downloadlinux-79ce058032c391b12af928b1e30abf92482a270f.tar.xz
drm: drm_fourcc: Add uncompressed AFBC modifier
AFBC has a mode that guarantees use of AFBC with an uncompressed payloads, we add a new modifier to support this mode. V2: updated modifier comment Signed-off-by: Ben Davis <ben.davis@arm.com> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200430083220.17347-1-ben.davis@arm.com
-rw-r--r--include/uapi/drm/drm_fourcc.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 3c4055e48371..299f9ac4840b 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -808,6 +808,18 @@ extern "C" {
*/
#define AFBC_FORMAT_MOD_BCH (1ULL << 11)
+/* AFBC uncompressed storage mode
+ *
+ * Indicates that the buffer is using AFBC uncompressed storage mode.
+ * In this mode all superblock payloads in the buffer use the uncompressed
+ * storage mode, which is usually only used for data which cannot be compressed.
+ * The buffer layout is the same as for AFBC buffers without USM set, this only
+ * affects the storage mode of the individual superblocks. Note that even a
+ * buffer without USM set may use uncompressed storage mode for some or all
+ * superblocks, USM just guarantees it for all.
+ */
+#define AFBC_FORMAT_MOD_USM (1ULL << 12)
+
/*
* Arm 16x16 Block U-Interleaved modifier
*