From 6ea138d6651674aeffa95eb9dae116b8c327b4f2 Mon Sep 17 00:00:00 2001
From: David Zhang <dingchen.zhang@amd.com>
Date: Thu, 31 Mar 2022 11:55:49 -0400
Subject: drm: add PSR2 support and capability definition as per eDP 1.5
Git-commit: 72907bff3bd346ef4879bd1dfc89ba12133da368
Patch-mainline: v5.19-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
[why & how]
As per eDP 1.5 spec, add the below two DPCD bit fields for PSR-SU
support and capability:
1. DP_PSR2_WITH_Y_COORD_ET_SUPPORTED
2. DP_PSR2_SU_AUX_FRAME_SYNC_NOT_NEEDED
changes in v2
------------------
* fixed the typo
* explicitly list what DPCD bit fields are added
Signed-off-by: David Zhang <dingchen.zhang@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>
---
include/drm/dp/drm_dp_helper.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/drm/dp/drm_dp_helper.h b/include/drm/dp/drm_dp_helper.h
index 91af98e6617c..c2eb119e1f4a 100644
--- a/include/drm/dp/drm_dp_helper.h
+++ b/include/drm/dp/drm_dp_helper.h
@@ -361,6 +361,7 @@ struct drm_panel;
# define DP_PSR_IS_SUPPORTED 1
# define DP_PSR2_IS_SUPPORTED 2 /* eDP 1.4 */
# define DP_PSR2_WITH_Y_COORD_IS_SUPPORTED 3 /* eDP 1.4a */
+# define DP_PSR2_WITH_Y_COORD_ET_SUPPORTED 4 /* eDP 1.5, adopted eDP 1.4b SCR */
#define DP_PSR_CAPS 0x071 /* XXX 1.2? */
# define DP_PSR_NO_TRAIN_ON_EXIT 1
@@ -375,6 +376,7 @@ struct drm_panel;
# define DP_PSR_SETUP_TIME_SHIFT 1
# define DP_PSR2_SU_Y_COORDINATE_REQUIRED (1 << 4) /* eDP 1.4a */
# define DP_PSR2_SU_GRANULARITY_REQUIRED (1 << 5) /* eDP 1.4b */
+# define DP_PSR2_SU_AUX_FRAME_SYNC_NOT_NEEDED (1 << 6)/* eDP 1.5, adopted eDP 1.4b SCR */
#define DP_PSR2_SU_X_GRANULARITY 0x072 /* eDP 1.4b */
#define DP_PSR2_SU_Y_GRANULARITY 0x074 /* eDP 1.4b */
--
2.38.1