/* Applies to unknown1 */
#define MALI_NO_ALPHA_TO_COVERAGE (1 << 10)
+/* Flags denoting the fragment shader's use of tilebuffer readback. If the
+ * shader might read any part of the tilebuffer, set MALI_READS_TILEBUFFER. If
+ * it might read depth/stencil in particular, also set MALI_READS_ZS */
+
+#define MALI_READS_ZS (1 << 12)
+#define MALI_READS_TILEBUFFER (1 << 16)
+
struct mali_blend_meta {
#ifndef BIFROST
/* Base value of 0x200.
MALI_ATTR_NPOT_DIVIDE = 4,
};
+/* This magic "pseudo-address" is used as `elements` to implement
+ * gl_PointCoord. When read from a fragment shader, it generates a point
+ * coordinate per the OpenGL ES 2.0 specification. Flipped coordinate spaces
+ * require an affine transformation in the shader. */
+
+#define MALI_VARYING_POINT_COORD (0x60)
+
union mali_attr {
/* This is used for actual attributes. */
struct {
*/
/* Applies to unknown_draw */
+
#define MALI_DRAW_INDEXED_UINT8 (0x10)
#define MALI_DRAW_INDEXED_UINT16 (0x20)
#define MALI_DRAW_INDEXED_UINT32 (0x30)
#define MALI_DRAW_VARYING_SIZE (0x100)
+#define MALI_DRAW_PRIMITIVE_RESTART_FIXED_INDEX (0x10000)
struct mali_vertex_tiler_prefix {
/* This is a dynamic bitfield containing the following things in this order:
u16 viewport1[2];
} __attribute__((packed));
-/* TODO: Varying meta is symmetrical with attr_meta, but there is some
- * weirdness associated. Figure it out. */
-
-struct mali_unknown6 {
- u64 unknown0;
- u64 unknown1;
-};
-
/* From presentations, 16x16 tiles externally. Use shift for fast computation
* of tile numbers. */
* - TODO: Anything else?
*/
+/* Flags field: note, these are guesses */
+
+#define MALI_EXTRA_PRESENT (0x400)
+#define MALI_EXTRA_AFBC (0x20)
+#define MALI_EXTRA_AFBC_ZS (0x10)
+#define MALI_EXTRA_ZS (0x4)
+
struct bifrost_fb_extra {
mali_ptr checksum;
/* Each tile has an 8 byte checksum, so the stride is "width in tiles * 8" */
u32 checksum_stride;
- u32 unk;
+ u32 flags;
union {
/* Note: AFBC is only allowed for 24/8 combined depth/stencil. */
} __attribute__((packed));
/* flags for unk3 */
+
+/* Enables writing depth results back to main memory (rather than keeping them
+ * on-chip in the tile buffer and then discarding) */
+
+#define MALI_MFBD_DEPTH_WRITE (1 << 10)
+
+/* The MFBD contains the extra bifrost_fb_extra section */
+
#define MALI_MFBD_EXTRA (1 << 13)
struct bifrost_framebuffer {