From 6728122f17ba60167c8a57b7184ff3213192883c Mon Sep 17 00:00:00 2001
From: Lijo Lazar <lijo.lazar@amd.com>
Date: Fri, 25 Feb 2022 09:43:49 +0530
Subject: drm/amd/pm: Send message when resp status is 0xFC
Git-commit: 8718ca1dbf497c302df989afaeb82f05f5a3d961
Patch-mainline: v5.18-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

When PMFW is really busy, it will respond with 0xFC. However, it doesn't
change the response register state when it becomes free. Driver should
retry and proceed to send message if the response status is 0xFC.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
index 89b22b261066..ae64d1980f10 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
@@ -303,7 +303,6 @@ int smu_cmn_send_msg_without_waiting(struct smu_context *smu,
 	reg = __smu_cmn_poll_stat(smu);
 	res = __smu_cmn_reg2errno(smu, reg);
 	if (reg == SMU_RESP_NONE ||
-	    reg == SMU_RESP_BUSY_OTHER ||
 	    res == -EREMOTEIO)
 		goto Out;
 	__smu_cmn_send_msg(smu, msg_index, param);
@@ -397,7 +396,6 @@ int smu_cmn_send_smc_msg_with_param(struct smu_context *smu,
 	reg = __smu_cmn_poll_stat(smu);
 	res = __smu_cmn_reg2errno(smu, reg);
 	if (reg == SMU_RESP_NONE ||
-	    reg == SMU_RESP_BUSY_OTHER ||
 	    res == -EREMOTEIO) {
 		__smu_cmn_reg_print_error(smu, reg, index, param, msg);
 		goto Out;
-- 
2.38.1