drm/amd/display: Add DP 2.0 SST DC Support

1. Retrieve 128/132b link cap.
2. 128/132b link training and payload allocation.
3. UHBR10 link rate support.

[squash in warning fixes - Alex]

Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 45 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/display/include/dpcd_defs.h b/drivers/gpu/drm/amd/display/include/dpcd_defs.h
index aec7389aff37..6fb7c0145cb6 100644
--- a/drivers/gpu/drm/amd/display/include/dpcd_defs.h
+++ b/drivers/gpu/drm/amd/display/include/dpcd_defs.h
@@ -80,6 +80,15 @@ enum dpcd_phy_test_patterns {
 	PHY_TEST_PATTERN_CP2520_1,
 	PHY_TEST_PATTERN_CP2520_2,
 	PHY_TEST_PATTERN_CP2520_3, /* same as TPS4 */
+	PHY_TEST_PATTERN_128b_132b_TPS1 = 0x8,
+	PHY_TEST_PATTERN_128b_132b_TPS2 = 0x10,
+	PHY_TEST_PATTERN_PRBS9 = 0x18,
+	PHY_TEST_PATTERN_PRBS11 = 0x20,
+	PHY_TEST_PATTERN_PRBS15 = 0x28,
+	PHY_TEST_PATTERN_PRBS23 = 0x30,
+	PHY_TEST_PATTERN_PRBS31 = 0x38,
+	PHY_TEST_PATTERN_264BIT_CUSTOM = 0x40,
+	PHY_TEST_PATTERN_SQUARE_PULSE = 0x48,
 };
 
 enum dpcd_test_dyn_range {
@@ -135,7 +144,14 @@ enum dpcd_training_patterns {
 	DPCD_TRAINING_PATTERN_1,
 	DPCD_TRAINING_PATTERN_2,
 	DPCD_TRAINING_PATTERN_3,
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	DPCD_TRAINING_PATTERN_4 = 7,
+	DPCD_128b_132b_TPS1 = 1,
+	DPCD_128b_132b_TPS2 = 2,
+	DPCD_128b_132b_TPS2_CDS = 3,
+#else
 	DPCD_TRAINING_PATTERN_4 = 7
+#endif
 };
 
 /* This enum is for use with PsrSinkPsrStatus.bits.sinkSelfRefreshStatus
diff --git a/drivers/gpu/drm/amd/display/include/link_service_types.h b/drivers/gpu/drm/amd/display/include/link_service_types.h
index efd9812c13ec..c729b50c4f20 100644
--- a/drivers/gpu/drm/amd/display/include/link_service_types.h
+++ b/drivers/gpu/drm/amd/display/include/link_service_types.h
@@ -53,7 +53,11 @@ enum edp_revision {
 };
 
 enum {
-	LINK_RATE_REF_FREQ_IN_KHZ = 27000 /*27MHz*/
+	LINK_RATE_REF_FREQ_IN_KHZ = 27000, /*27MHz*/
+	BITS_PER_DP_BYTE = 10,
+	DATA_EFFICIENCY_8b_10b_x10000 = 8000, /* 80% data efficiency */
+	DATA_EFFICIENCY_8b_10b_FEC_EFFICIENCY_x100 = 97, /* 97% data efficiency when FEC is enabled */
+	DATA_EFFICIENCY_128b_132b_x10000 = 9646, /* 96.71% data efficiency x 99.75% downspread factor */
 };
 
 enum link_training_result {
@@ -70,6 +74,12 @@ enum link_training_result {
 	LINK_TRAINING_LINK_LOSS,
 	/* Abort link training (because sink unplugged) */
 	LINK_TRAINING_ABORT,
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	DP_128b_132b_LT_FAILED,
+	DP_128b_132b_MAX_LOOP_COUNT_REACHED,
+	DP_128b_132b_CHANNEL_EQ_DONE_TIMEOUT,
+	DP_128b_132b_CDS_DONE_TIMEOUT,
+#endif
 };
 
 enum lttpr_mode {
@@ -86,11 +96,23 @@ struct link_training_settings {
 	enum dc_pre_emphasis *pre_emphasis;
 	enum dc_post_cursor2 *post_cursor2;
 	bool should_set_fec_ready;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	/* TODO - factor lane_settings out because it changes during LT */
+	union dc_dp_ffe_preset *ffe_preset;
+#endif
 
 	uint16_t cr_pattern_time;
 	uint16_t eq_pattern_time;
+	uint16_t cds_pattern_time;
 	enum dc_dp_training_pattern pattern_for_cr;
 	enum dc_dp_training_pattern pattern_for_eq;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	enum dc_dp_training_pattern pattern_for_cds;
+
+	uint32_t eq_wait_time_limit;
+	uint8_t eq_loop_count_limit;
+	uint32_t cds_wait_time_limit;
+#endif
 
 	bool enhanced_framing;
 	bool allow_invalid_msa_timing_param;
diff --git a/drivers/gpu/drm/amd/display/include/logger_types.h b/drivers/gpu/drm/amd/display/include/logger_types.h
index 571fcf23cea9..370fad883e33 100644
--- a/drivers/gpu/drm/amd/display/include/logger_types.h
+++ b/drivers/gpu/drm/amd/display/include/logger_types.h
@@ -72,6 +72,9 @@
 #define DC_LOG_DSC(...) DRM_DEBUG_KMS(__VA_ARGS__)
 #define DC_LOG_SMU(...) pr_debug("[SMU_MSG]:"__VA_ARGS__)
 #define DC_LOG_DWB(...) DRM_DEBUG_KMS(__VA_ARGS__)
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+#define DC_LOG_DP2(...) DRM_DEBUG_KMS(__VA_ARGS__)
+#endif
 
 struct dal_logger;
 
@@ -123,6 +126,9 @@ enum dc_log_type {
 	LOG_MAX_HW_POINTS,
 	LOG_ALL_TF_CHANNELS,
 	LOG_SAMPLE_1DLUT,
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	LOG_DP2,
+#endif
 	LOG_SECTION_TOTAL_COUNT
 };