From 4736497a990de3697e38ad6852362b602fa74f6d Mon Sep 17 00:00:00 2001
From: Angus Wang <angus.wang@amd.com>
Date: Fri, 12 Nov 2021 12:13:48 -0500
Subject: drm/amd/display: Fix LTTPR not Enabled
Git-commit: 2430be71c0176ef2757b63df5a25aa5c9e488e25
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]
Previous LTTPR change has caused a regression that led to an
issue where LTTPR is disabled

[HOW]
Extended changes from previous fix to DCN30X

Reviewed-by: Wesley Chalmers <wesley.chalmers@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Angus Wang <angus.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 .../amd/display/dc/dcn301/dcn301_resource.c    | 17 +++++++++++++++++
 .../amd/display/dc/dcn302/dcn302_resource.c    | 18 ++++++++++++++++++
 .../amd/display/dc/dcn303/dcn303_resource.c    | 17 +++++++++++++++++
 3 files changed, 52 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
index d25eaa1e62c7..150729d59857 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
@@ -1485,6 +1485,23 @@ static bool dcn301_resource_construct(
 	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
 	dc->caps.color.mpc.ocsc = 1;
 
+	/* read VBIOS LTTPR caps */
+	if (ctx->dc_bios->funcs->get_lttpr_caps) {
+		enum bp_result bp_query_result;
+		uint8_t is_vbios_lttpr_enable = 0;
+
+		bp_query_result = ctx->dc_bios->funcs->get_lttpr_caps(ctx->dc_bios, &is_vbios_lttpr_enable);
+		dc->caps.vbios_lttpr_enable = (bp_query_result == BP_RESULT_OK) && !!is_vbios_lttpr_enable;
+	}
+
+	if (ctx->dc_bios->funcs->get_lttpr_interop) {
+		enum bp_result bp_query_result;
+		uint8_t is_vbios_interop_enabled = 0;
+
+		bp_query_result = ctx->dc_bios->funcs->get_lttpr_interop(ctx->dc_bios, &is_vbios_interop_enabled);
+		dc->caps.vbios_lttpr_aware = (bp_query_result == BP_RESULT_OK) && !!is_vbios_interop_enabled;
+	}
+
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
 		dc->debug = debug_defaults_drv;
 	else if (dc->ctx->dce_environment == DCE_ENV_FPGA_MAXIMUS) {
diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
index fcf96cf08c76..058f5d71e037 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
@@ -1557,6 +1557,24 @@ static bool dcn302_resource_construct(
 	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
 	dc->caps.color.mpc.ocsc = 1;
 
+	/* read VBIOS LTTPR caps */
+	if (ctx->dc_bios->funcs->get_lttpr_caps) {
+		enum bp_result bp_query_result;
+		uint8_t is_vbios_lttpr_enable = 0;
+
+		bp_query_result = ctx->dc_bios->funcs->get_lttpr_caps(ctx->dc_bios, &is_vbios_lttpr_enable);
+		dc->caps.vbios_lttpr_enable = (bp_query_result == BP_RESULT_OK) && !!is_vbios_lttpr_enable;
+	}
+
+	if (ctx->dc_bios->funcs->get_lttpr_interop) {
+		enum bp_result bp_query_result;
+		uint8_t is_vbios_interop_enabled = 0;
+
+		bp_query_result = ctx->dc_bios->funcs->get_lttpr_interop(ctx->dc_bios,
+				&is_vbios_interop_enabled);
+		dc->caps.vbios_lttpr_aware = (bp_query_result == BP_RESULT_OK) && !!is_vbios_interop_enabled;
+	}
+
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
 		dc->debug = debug_defaults_drv;
 	else
diff --git a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
index 4a9b64023675..7024aeb0884c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c
@@ -1500,6 +1500,23 @@ static bool dcn303_resource_construct(
 	dc->caps.color.mpc.ogam_rom_caps.hlg = 0;
 	dc->caps.color.mpc.ocsc = 1;
 
+	/* read VBIOS LTTPR caps */
+	if (ctx->dc_bios->funcs->get_lttpr_caps) {
+		enum bp_result bp_query_result;
+		uint8_t is_vbios_lttpr_enable = 0;
+
+		bp_query_result = ctx->dc_bios->funcs->get_lttpr_caps(ctx->dc_bios, &is_vbios_lttpr_enable);
+		dc->caps.vbios_lttpr_enable = (bp_query_result == BP_RESULT_OK) && !!is_vbios_lttpr_enable;
+	}
+
+	if (ctx->dc_bios->funcs->get_lttpr_interop) {
+		enum bp_result bp_query_result;
+		uint8_t is_vbios_interop_enabled = 0;
+
+		bp_query_result = ctx->dc_bios->funcs->get_lttpr_interop(ctx->dc_bios, &is_vbios_interop_enabled);
+		dc->caps.vbios_lttpr_aware = (bp_query_result == BP_RESULT_OK) && !!is_vbios_interop_enabled;
+	}
+
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
 		dc->debug = debug_defaults_drv;
 	else
-- 
2.38.1