[PATCH 31/35] drm/i915/bios: Define VBT block 57 (Vswing PreEmphasis Table) contents

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

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 at linux.intel.com>
---
 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