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-rw-r--r--0004-drm-amd-display-Only-revalidate-bandwidth-on-medium-.patch43
1 files changed, 43 insertions, 0 deletions
diff --git a/0004-drm-amd-display-Only-revalidate-bandwidth-on-medium-.patch b/0004-drm-amd-display-Only-revalidate-bandwidth-on-medium-.patch
new file mode 100644
index 00000000000..a1acdd3d2e5
--- /dev/null
+++ b/0004-drm-amd-display-Only-revalidate-bandwidth-on-medium-.patch
@@ -0,0 +1,43 @@
+From 7fab9d4206e54d19b578c70cd0529045ad642f25 Mon Sep 17 00:00:00 2001
+From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
+Date: Mon, 29 Jun 2020 13:03:52 -0400
+Subject: [PATCH 4/5] drm/amd/display: Only revalidate bandwidth on medium and
+ fast updates
+
+[Why]
+Changes that are fast don't require updating DLG parameters making
+this call unnecessary. Considering this is an expensive call it should
+not be done on every flip.
+
+[How]
+Guard the validation to only happen if update type isn't FAST.
+
+Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc.c | 10 ++++++----
+ 1 file changed, 6 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
+index 4acaf4be8a81..c825d383f0f1 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
+@@ -2533,10 +2533,12 @@ void dc_commit_updates_for_stream(struct dc *dc,
+
+ copy_stream_update_to_stream(dc, context, stream, stream_update);
+
+- if (!dc->res_pool->funcs->validate_bandwidth(dc, context, false)) {
+- DC_ERROR("Mode validation failed for stream update!\n");
+- dc_release_state(context);
+- return;
++ if (update_type > UPDATE_TYPE_FAST) {
++ if (!dc->res_pool->funcs->validate_bandwidth(dc, context, false)) {
++ DC_ERROR("Mode validation failed for stream update!\n");
++ dc_release_state(context);
++ return;
++ }
+ }
+
+ commit_planes_for_stream(
+--
+2.27.0
+