From 547b3e44c869f1adfd8693188f0b3261d38ed655 Mon Sep 17 00:00:00 2001
From: David Zhang <dingchen.zhang@amd.com>
Date: Tue, 3 May 2022 17:53:44 -0400
Subject: drm/amd/display: expose AMD specific DPCD for PSR-SU-RC support
Git-commit: 6bad4ff84cb57f548d42a41091159b750eed9ef9
Patch-mainline: v6.0-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
[why & how]
Expose vendor specific DPCD registers for rate controlling the eDP sink
TCON's refresh rate during PSR active. When used in combination with
PSR-SU and Freesync, it is called PSR-SU Rate Contorol, or PSR-SU-RC for
short.
v2: Add all DPCD registers required
Signed-off-by: David Zhang <dingchen.zhang@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/include/ddc_service_types.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/include/ddc_service_types.h b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
index 20a3d4e23f66..05096c644a60 100644
--- a/drivers/gpu/drm/amd/display/include/ddc_service_types.h
+++ b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
@@ -41,6 +41,10 @@
#define DP_DEVICE_ID_38EC11 0x38EC11
#define DP_FORCE_PSRSU_CAPABILITY 0x40F
+#define DP_SINK_PSR_ACTIVE_VTOTAL 0x373
+#define DP_SINK_PSR_ACTIVE_VTOTAL_CONTROL_MODE 0x375
+#define DP_SOURCE_PSR_ACTIVE_VTOTAL 0x376
+
enum ddc_result {
DDC_RESULT_UNKNOWN = 0,
DDC_RESULT_SUCESSFULL,
--
2.38.1