From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Define the contents of VBT block 57 (Vswing PreEmphasis Table).
The contents is highly platform specific. The columns of the
table corresponding to some set of PHY/etc registers. The rows
corresponding to all legal vswing+pre-emphasis combinations
(ie. should be 10 rows in each table). And each table
corresponds to a platform specific (mostly undocumented)
mapping based on link rate/eDP low-vswing/etc. parameters.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_vbt_defs.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index 50d0d96fca67..0e5a2bf429f4 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -184,6 +184,7 @@ enum bdb_block_id {
BDB_MIPI_SEQUENCE = 53, /* 177+ */
BDB_RGB_PALETTE = 54, /* 180+ */
BDB_COMPRESSION_PARAMETERS = 56, /* 213+ */
+ BDB_VSWING_PREEMPH = 57, /* 218+ */
BDB_GENERIC_DTD = 58, /* 229+ */
BDB_SKIP = 254, /* VBIOS only */
};
@@ -1486,6 +1487,16 @@ struct bdb_compression_parameters {
struct dsc_compression_parameters_entry data[16];
} __packed;
+/*
+ * Block 57 - Vswing PreEmphasis Table
+ */
+
+struct bdb_vswing_preemph {
+ u8 num_tables;
+ u8 num_columns;
+ u32 tables[];
+} __packed;
+
/*
* Block 58 - Generic DTD Block
*/
--
2.43.2
