From 08dac62f3e20f1069a8a7e0a1938a3a18886af20 Mon Sep 17 00:00:00 2001
From: Prike Liang <Prike.Liang@amd.com>
Date: Mon, 16 Sep 2019 15:56:52 +0800
Subject: drm/amd/powerplay: implement VCN power gating control interface
Git-commit: 08dac62f3e20f1069a8a7e0a1938a3a18886af20
Patch-mainline: v5.5-rc1
References: bsc#1152489

VCN Gate/Ungate by processing the SMU power up/down message, otherwise
S3 will resume failed as JPEG always power off during start VCN stage.

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/amd/powerplay/renoir_ppt.c | 28 +++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/renoir_ppt.c b/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
index 2c22ba49c453..9311b6acc34d 100644
--- a/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
@@ -278,6 +278,32 @@ static enum amd_pm_state_type renoir_get_current_power_state(struct smu_context
 	return pm_type;
 }
 
+static int renoir_dpm_set_uvd_enable(struct smu_context *smu, bool enable)
+{
+	struct smu_power_context *smu_power = &smu->smu_power;
+	struct smu_power_gate *power_gate = &smu_power->power_gate;
+	int ret = 0;
+
+	if (enable) {
+		/* vcn dpm on is a prerequisite for vcn power gate messages */
+		if (smu_feature_is_enabled(smu, SMU_FEATURE_VCN_PG_BIT)) {
+			ret = smu_send_smc_msg_with_param(smu, SMU_MSG_PowerUpVcn, 1);
+			if (ret)
+				return ret;
+		}
+		power_gate->vcn_gated = false;
+	} else {
+		if (smu_feature_is_enabled(smu, SMU_FEATURE_VCN_PG_BIT)) {
+			ret = smu_send_smc_msg(smu, SMU_MSG_PowerDownVcn);
+			if (ret)
+				return ret;
+		}
+		power_gate->vcn_gated = true;
+	}
+
+	return ret;
+}
+
 static const struct pptable_funcs renoir_ppt_funcs = {
 	.get_smu_msg_index = renoir_get_smu_msg_index,
 	.get_smu_table_index = renoir_get_smu_table_index,
@@ -286,7 +312,7 @@ static const struct pptable_funcs renoir_ppt_funcs = {
 	.get_dpm_uclk_limited = renoir_get_dpm_uclk_limited,
 	.print_clk_levels = renoir_print_clk_levels,
 	.get_current_power_state = renoir_get_current_power_state,
-
+	.dpm_set_uvd_enable = renoir_dpm_set_uvd_enable,
 };
 
 void renoir_set_ppt_funcs(struct smu_context *smu)
-- 
2.28.0