From e475533f357a612703e65274f5870fa393014126 Mon Sep 17 00:00:00 2001
From: Oliver Logush <oliver.logush@amd.com>
Date: Fri, 1 Apr 2022 10:40:30 -0400
Subject: drm/amd/display: Insert smu busy status before sending another
 request
Git-commit: 721af39f003668a86650a640b41439b7c145c52e
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]
Need to check if result register is busy before sending another request

[how]
Call method to check if result register is busy

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Oliver Logush <oliver.logush@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/dcn301_smu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/dcn301_smu.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/dcn301_smu.c
index d9920d91838d..1cae01a91a69 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/dcn301_smu.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/dcn301_smu.c
@@ -94,6 +94,8 @@ static int dcn301_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr,
 {
 	uint32_t result;
 
+	result = dcn301_smu_wait_for_response(clk_mgr, 10, 200000);
+
 	/* First clear response register */
 	REG_WRITE(MP1_SMN_C2PMSG_91, VBIOSSMC_Status_BUSY);
 
-- 
2.38.1