From 76bd34786ebd323cf4c32604cf6166b08aaa3ffa Mon Sep 17 00:00:00 2001
From: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Date: Tue, 16 May 2023 13:54:54 -0400
Subject: [PATCH] drm/amd/display: Read replay data from sink
Read DP_SINK_PR_PIXEL_DEVIATION_PER_LINE and
DP_SINK_PR_MAX_NUMBER_OF_DEVIATION_LINE
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
.../amd/display/dc/link/protocols/link_dp_capability.c | 10 ++++++++++
drivers/gpu/drm/amd/display/include/dpcd_defs.h | 2 ++
2 files changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
index b38ac3ea06b0f..237e0ff955f3c 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
@@ -2009,6 +2009,16 @@ void detect_edp_sink_caps(struct dc_link *link)
core_link_read_dpcd(link, DP_RECEIVER_ALPM_CAP,
&link->dpcd_caps.alpm_caps.raw,
sizeof(link->dpcd_caps.alpm_caps.raw));
+
+ /*
+ * Read REPLAY info
+ */
+ core_link_read_dpcd(link, DP_SINK_PR_PIXEL_DEVIATION_PER_LINE,
+ &link->dpcd_caps.pr_info.pixel_deviation_per_line,
+ sizeof(link->dpcd_caps.pr_info.pixel_deviation_per_line));
+ core_link_read_dpcd(link, DP_SINK_PR_MAX_NUMBER_OF_DEVIATION_LINE,
+ &link->dpcd_caps.pr_info.max_deviation_line,
+ sizeof(link->dpcd_caps.pr_info.max_deviation_line));
}
bool dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap)
diff --git a/drivers/gpu/drm/amd/display/include/dpcd_defs.h b/drivers/gpu/drm/amd/display/include/dpcd_defs.h
index f72023a296a01..914f28e9f2242 100644
--- a/drivers/gpu/drm/amd/display/include/dpcd_defs.h
+++ b/drivers/gpu/drm/amd/display/include/dpcd_defs.h
@@ -174,5 +174,7 @@ enum dpcd_psr_sink_states {
#define DP_SOURCE_BACKLIGHT_ENABLE 0x32F
#define DP_SOURCE_MINIMUM_HBLANK_SUPPORTED 0x340
#define DP_SINK_PR_REPLAY_STATUS 0x378
+#define DP_SINK_PR_PIXEL_DEVIATION_PER_LINE 0x379
+#define DP_SINK_PR_MAX_NUMBER_OF_DEVIATION_LINE 0x37A
#endif /* __DAL_DPCD_DEFS_H__ */