From ba8e59773ae59818695d1e20b8939282da80ec8c Mon Sep 17 00:00:00 2001
From: Bindu Ramamurthy <bindu.r@amd.com>
Date: Thu, 20 May 2021 10:06:04 -0400
Subject: [PATCH] drm/amd/display: Allow bandwidth validation for 0 streams.
Git-commit: ba8e59773ae59818695d1e20b8939282da80ec8c
Patch-mainline: v5.13-rc5
References: git-fixes
[Why]
Bandwidth calculations are triggered for non zero streams, and
in case of 0 streams, these calculations were skipped with
pstate status not being updated.
[How]
As the pstate status is applicable for non zero streams, check
added for allowing 0 streams inline with dcn internal bandwidth
validations.
Signed-off-by: Bindu Ramamurthy <bindu.r@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index 527e56c353cb..8357aa3c41d5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -3236,7 +3236,7 @@ static noinline bool dcn20_validate_bandwidth_fp(struct dc *dc,
voltage_supported = dcn20_validate_bandwidth_internal(dc, context, false);
dummy_pstate_supported = context->bw_ctx.bw.dcn.clk.p_state_change_support;
- if (voltage_supported && dummy_pstate_supported) {
+ if (voltage_supported && (dummy_pstate_supported || !(context->stream_count))) {
context->bw_ctx.bw.dcn.clk.p_state_change_support = false;
goto restore_dml_state;
}
--
2.26.2