This is a note to let you know that I've just added the patch titled
drm/amd/display: always switch off ODM before committing more streams
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-always-switch-off-odm-before-committing-more-streams.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 49a30c3d1a2258fc93cfe6eea8e4951dabadc824 Mon Sep 17 00:00:00 2001
From: Wenjing Liu <wenjing.liu@xxxxxxx>
Date: Tue, 15 Aug 2023 10:47:52 -0400
Subject: drm/amd/display: always switch off ODM before committing more streams
From: Wenjing Liu <wenjing.liu@xxxxxxx>
commit 49a30c3d1a2258fc93cfe6eea8e4951dabadc824 upstream.
ODM power optimization is only supported with single stream. When ODM
power optimization is enabled, we might not have enough free pipes for
enabling other stream. So when we are committing more than 1 stream we
should first switch off ODM power optimization to make room for new
stream and then allocating pipe resource for the new stream.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 59de751e3845 ("drm/amd/display: add ODM case when looking for first split pipe")
Reviewed-by: Dillon Varone <dillon.varone@xxxxxxx>
Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Wenjing Liu <wenjing.liu@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2061,12 +2061,12 @@ enum dc_status dc_commit_streams(struct
}
}
- /* Check for case where we are going from odm 2:1 to max
- * pipe scenario. For these cases, we will call
- * commit_minimal_transition_state() to exit out of odm 2:1
- * first before processing new streams
+ /* ODM Combine 2:1 power optimization is only applied for single stream
+ * scenario, it uses extra pipes than needed to reduce power consumption
+ * We need to switch off this feature to make room for new streams.
*/
- if (stream_count == dc->res_pool->pipe_count) {
+ if (stream_count > dc->current_state->stream_count &&
+ dc->current_state->stream_count == 1) {
for (i = 0; i < dc->res_pool->pipe_count; i++) {
pipe = &dc->current_state->res_ctx.pipe_ctx[i];
if (pipe->next_odm_pipe)
Patches currently in stable-queue which might be from wenjing.liu@xxxxxxx are
queue-6.5/drm-amd-display-update-blank-state-on-odm-changes.patch
queue-6.5/drm-amd-display-always-switch-off-odm-before-committing-more-streams.patch
