[PATCH] drm/fourcc: add Vivante TS modifiers

[Lucas Stach]

Vivante TS (tile-status) buffer modifiers. They can be combined with all of
the Vivante color buffer tiling modifiers, so they are kind of a modifier
modifier. If a TS modifier is present we have a additional plane for the
TS buffer and the modifier defines the layout of this TS buffer.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 include/uapi/drm/drm_fourcc.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index f76de49c768f..76df2a932637 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -623,6 +623,22 @@ extern "C" {
  */
 #define DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED fourcc_mod_code(VIVANTE, 4)
 
+/*
+ * Vivante TS (tile-status) buffer modifiers. They can be combined with all of
+ * the color buffer tiling modifiers defined above. When TS is present it's a
+ * separate buffer containing the clear/compression status of each tile. The
+ * modifiers are defined as VIVANTE_MOD_TS_c_s, where c is the color buffer tile
+ * size in bytes covered by one entry in the status buffer and s is the number
+ * of status bits per entry.
+ * We reserve the top 8bits of the Vivante modifier space for TS modifiers, as
+ * future cores might add some more TS layout variations.
+ */
+#define VIVANTE_MOD_TS_64_4               (1ULL << 48)
+#define VIVANTE_MOD_TS_64_2               (2ULL << 48)
+#define VIVANTE_MOD_TS_128_4              (3ULL << 48)
+#define VIVANTE_MOD_TS_256_4              (4ULL << 48)
+#define VIVANTE_MOD_TS_MASK               (0xffULL  << 48)
+
 /* NVIDIA frame buffer modifiers */
 
 /*
-- 
2.29.2