This is a note to let you know that I've just added the patch titled
drm/amd/display: Reduce expected sdp bandwidth for dcn321
to the 6.1-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-reduce-expected-sdp-bandwidth-for-dc.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8294f1cd26c6d60212e7f27f8711cf64eabd1bc9
Author: Dillon Varone <Dillon.Varone@xxxxxxx>
Date: Fri Dec 2 22:56:57 2022 -0500
drm/amd/display: Reduce expected sdp bandwidth for dcn321
[ Upstream commit 6b81090d6d4cc0fd818c9ec9dbb6906f921ad396 ]
[Description]
Modify soc BB to reduce expected sdp bandwidth and align with measurements to
fix underflow issues.
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Jasdeep Dhillon <jdhillon@xxxxxxx>
Signed-off-by: Dillon Varone <Dillon.Varone@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn321/dcn321_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn321/dcn321_fpu.c
index f4b176599be7a..0ea406145c1d7 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn321/dcn321_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn321/dcn321_fpu.c
@@ -136,7 +136,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_21_soc = {
.urgent_out_of_order_return_per_channel_pixel_only_bytes = 4096,
.urgent_out_of_order_return_per_channel_pixel_and_vm_bytes = 4096,
.urgent_out_of_order_return_per_channel_vm_only_bytes = 4096,
- .pct_ideal_sdp_bw_after_urgent = 100.0,
+ .pct_ideal_sdp_bw_after_urgent = 90.0,
.pct_ideal_fabric_bw_after_urgent = 67.0,
.pct_ideal_dram_sdp_bw_after_urgent_pixel_only = 20.0,
.pct_ideal_dram_sdp_bw_after_urgent_pixel_and_vm = 60.0, // N/A, for now keep as is until DML implemented
