From d31529b71774c708f6864805a2df1a0510a38cf1 Mon Sep 17 00:00:00 2001
From: Aurabindo Pillai <aurabindo.pillai@amd.com>
Date: Tue, 7 Dec 2021 12:14:40 -0500
Subject: drm/amd/display: Add feature flags to disable LTTPR
Git-commit: 123202744955e62470174fc3ba666a4d98062ea6
Patch-mainline: v5.17-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]
Allow for disabling non transparent mode of LTTPR for running tests.
[How]
Add a feature flag and set them during init sequence. The flags are
already being used in DC.
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++++
drivers/gpu/drm/amd/include/amd_shared.h | 2 ++
2 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 6470f797b57d..75385dc7a5f5 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1458,6 +1458,13 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
if (amdgpu_dc_feature_mask & DC_EDP_NO_POWER_SEQUENCING)
init_data.flags.edp_no_power_sequencing = true;
+#ifdef CONFIG_DRM_AMD_DC_DCN
+ if (amdgpu_dc_feature_mask & DC_DISABLE_LTTPR_DP1_4A)
+ init_data.flags.allow_lttpr_non_transparent_mode.bits.DP1_4A = true;
+ if (amdgpu_dc_feature_mask & DC_DISABLE_LTTPR_DP2_0)
+ init_data.flags.allow_lttpr_non_transparent_mode.bits.DP2_0 = true;
+#endif
+
init_data.flags.power_down_display_on_boot = true;
if (check_seamless_boot_capability(adev)) {
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 4b9e68a79f06..f57a1478f0fe 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -231,6 +231,8 @@ enum DC_FEATURE_MASK {
DC_DISABLE_FRACTIONAL_PWM_MASK = (1 << 2), //0x4, disabled by default
DC_PSR_MASK = (1 << 3), //0x8, disabled by default for dcn < 3.1
DC_EDP_NO_POWER_SEQUENCING = (1 << 4), //0x10, disabled by default
+ DC_DISABLE_LTTPR_DP1_4A = (1 << 5), //0x20, disabled by default
+ DC_DISABLE_LTTPR_DP2_0 = (1 << 6), //0x40, disabled by default
};
enum DC_DEBUG_MASK {
--
2.38.1