[PATCH V3] drm: Add LTTPR defines for DP 1.4a

[Siqueira, Rodrigo]

DP 1.4a specification defines Link Training Tunable PHY Repeater (LTTPR)
which is required to add support for systems with Thunderbolt or other
repeater devices.

Changes since V2:
- Drop the kernel-doc comment
- Reorder LTTPR according to register offset
Changes since V1:
- Adjusts registers names to be aligned with spec and the rest of the
  file
- Update spec comment from 1.4 to 1.4a

Cc: Abdoulaye Berthe <Abdoulaye.Berthe at amd.com>
Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Leo Li <sunpeng.li at amd.com>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
Signed-off-by: Abdoulaye Berthe <Abdoulaye.Berthe at amd.com>
---
 include/drm/drm_dp_helper.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 8364502f92cf..67f9121d781d 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -989,6 +989,31 @@
 #define HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(x)	((x) & BIT(3))
 #define HDCP_2_2_DP_RXSTATUS_LINK_FAILED(x)	((x) & BIT(4))
 
+/* Link Training (LT)-tunable Physical Repeaters - DP 1.4a */
+#define DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV 0xf0000
+#define DP_MAX_LINK_RATE_PHY_REPEATER                       0xf0001
+#define DP_PHY_REPEATER_CNT                                 0xf0002
+#define DP_PHY_REPEATER_MODE                                0xf0003
+#define DP_MAX_LANE_COUNT_PHY_REPEATER                      0xf0004
+#define DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT               0xf0005
+#define DP_TRAINING_PATTERN_SET_PHY_REPEATER1               0xf0010
+#define DP_TRAINING_LANE0_SET_PHY_REPEATER1                 0xf0011
+#define DP_TRAINING_LANE1_SET_PHY_REPEATER1                 0xf0012
+#define DP_TRAINING_LANE2_SET_PHY_REPEATER1                 0xf0013
+#define DP_TRAINING_LANE3_SET_PHY_REPEATER1                 0xf0014
+#define DP_TRAINING_AUX_RD_INTERVAL_PHY_REPEATER1           0xf0020
+#define DP_TRANSMITTER_CAPABILITY_PHY_REPEATER1             0xf0021
+#define DP_LANE0_1_STATUS_PHY_REPEATER1                     0xf0030
+#define DP_LANE2_3_STATUS_PHY_REPEATER1                     0xf0031
+#define DP_LANE_ALIGN_STATUS_UPDATED_PHY_REPEATER1          0xf0032
+#define DP_ADJUST_REQUEST_LANE0_1_PHY_REPEATER1             0xf0033
+#define DP_ADJUST_REQUEST_LANE2_3_PHY_REPEATER1             0xf0034
+#define DP_SYMBOL_ERROR_COUNT_LANE0_PHY_REPEATER1           0xf0035
+#define DP_SYMBOL_ERROR_COUNT_LANE1_PHY_REPEATER1           0xf0037
+#define DP_SYMBOL_ERROR_COUNT_LANE2_PHY_REPEATER1           0xf0039
+#define DP_SYMBOL_ERROR_COUNT_LANE3_PHY_REPEATER1           0xf003b
+#define DP_FEC_STATUS_PHY_REPEATER1                         0xf0290
+
 /* DP 1.2 Sideband message defines */
 /* peer device type - DP 1.2a Table 2-92 */
 #define DP_PEER_DEVICE_NONE		0x0
-- 
2.23.0
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