Add definition for block 56, the compression parameters.
Cc: Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_vbt_defs.h | 50 +++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index e3045ced4bfe..7f222196d2d5 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -114,6 +114,7 @@ enum bdb_block_id {
BDB_LVDS_POWER = 44,
BDB_MIPI_CONFIG = 52,
BDB_MIPI_SEQUENCE = 53,
+ BDB_COMPRESSION_PARAMETERS = 56,
BDB_SKIP = 254, /* VBIOS private block, ignore */
};
@@ -811,4 +812,53 @@ struct bdb_mipi_sequence {
u8 data[0]; /* up to 6 variable length blocks */
} __packed;
+/*
+ * Block 56 - Compression Parameters
+ */
+
+#define VBT_RC_BUFFER_BLOCK_SIZE_1KB 0
+#define VBT_RC_BUFFER_BLOCK_SIZE_4KB 1
+#define VBT_RC_BUFFER_BLOCK_SIZE_16KB 2
+#define VBT_RC_BUFFER_BLOCK_SIZE_64KB 3
+
+#define VBT_DSC_LINE_BUFFER_DEPTH(vbt_value) ((vbt_value) + 8) /* bits */
+#define VBT_DSC_MAX_BPP(vbt_value) (6 + (vbt_value) * 2)
+
+struct dsc_compression_parameters_entry {
+ u8 version_major:4;
+ u8 version_minor:4;
+
+ u8 rc_buffer_block_size:2;
+ u8 reserved1:6;
+
+ /*
+ * Buffer size in bytes:
+ *
+ * 4 ^ rc_buffer_block_size * 1024 * (rc_buffer_size + 1) bytes
+ */
+ u8 rc_buffer_size;
+ u32 slices_per_line;
+
+ u8 line_buffer_depth:4;
+ u8 reserved2:4;
+
+ /* Flag Bits 1 */
+ u8 block_prediction_enable:1;
+ u8 reserved3:7;
+
+ u8 max_bpp; /* mapping */
+
+ /* Color depth capabilities */
+ u8 reserved4:1;
+ u8 support_8bpc:1;
+ u8 support_10bpc:1;
+ u8 support_12bpc:1;
+ u8 reserved5:4;
+} __packed;
+
+struct bdb_compression_parameters {
+ u16 entry_size;
+ struct dsc_compression_parameters_entry data[16];
+} __packed;
+
#endif /* _INTEL_VBT_DEFS_H_ */
--
2.20.1
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