Commit 96815f3d authored by Jani Nikula's avatar Jani Nikula
Browse files

drm/i915/bios: add compression parameter block definition 



Add definition for block 56, the compression parameters.

v2: add missing slice_height (Vandita)

Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: default avatarVandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191024075608.11511-1-jani.nikula@intel.com
parent 52aac377

drivers/gpu/drm/i915/display/intel_vbt_defs.h

+52 −0
Original line number Diff line number Diff line
@@ -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 +812,55 @@ 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;



	u16 slice_height;

} __packed;



struct bdb_compression_parameters {

	u16 entry_size;

	struct dsc_compression_parameters_entry data[16];

} __packed;



#endif /* _INTEL_VBT_DEFS_H_ */