From f359cc9d2b6ed116b27159a457f071b8b0a969cc Mon Sep 17 00:00:00 2001
From: Mikita Lipski <mikita.lipski@amd.com>
Date: Thu, 17 Jun 2021 16:17:09 -0400
Subject: drm/amd/display: Prevent Diags from entering S2
Git-commit: 97b9c006f153fc129fef60fbd91021c8aaf8697f
Patch-mainline: v5.15-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]
Lowering clocks when entering S2 Idle state causes DMUB to hang with
Diags.
[how]
Do not enter S2 optimization with Diags on dcn301 to prevent DMUB hang.
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@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/vg_clk_mgr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
index c636b589d69d..7046da14bb2a 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
@@ -114,7 +114,7 @@ void vg_update_clocks(struct clk_mgr *clk_mgr_base,
display_count = vg_get_active_display_cnt_wa(dc, context);
/* if we can go lower, go lower */
- if (display_count == 0) {
+ if (display_count == 0 && !IS_DIAG_DC(dc->ctx->dce_environment)) {
union display_idle_optimization_u idle_info = { 0 };
idle_info.idle_info.df_request_disabled = 1;
--
2.38.1