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From: <gregkh@linuxfoundation.org>
To: sancchen@amd.com, HaoPing.Liu@amd.com,
	Nicholas.Kazlauskas@amd.com, alexander.deucher@amd.com,
	mario.limonciello@amd.com
Cc: <stable@vger.kernel.org>
Subject: FAILED: patch "[PATCH] drm/amd/display: Change default Z8 watermark values" failed to apply to 6.1-stable tree
Date: Fri, 21 Jul 2023 09:23:38 +0200	[thread overview]
Message-ID: <2023072138-henchman-crusader-a6ce@gregkh> (raw)


The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 9749a42db74c3400e0526d9a39fa0324abfd0d66
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2023072138-henchman-crusader-a6ce@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:

9749a42db74c ("drm/amd/display: Change default Z8 watermark values")
9b0f51e8449f ("drm/amd/display: Update Z8 SR exit/enter latencies")
fa24e116f1ce ("drm/amd/display: Update Z8 watermarks for DCN314")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 9749a42db74c3400e0526d9a39fa0324abfd0d66 Mon Sep 17 00:00:00 2001
From: Leo Chen <sancchen@amd.com>
Date: Thu, 13 Apr 2023 17:34:24 -0400
Subject: [PATCH] drm/amd/display: Change default Z8 watermark values

[Why & How]
Previous Z8 watermark values were causing flickering and OTC underflow.
Updating Z8 watermark values based on the measurement.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Leo Chen <sancchen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
index 19370b872a91..1d00eb9e73c6 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
@@ -149,8 +149,8 @@ static struct _vcs_dpi_soc_bounding_box_st dcn3_14_soc = {
 	.num_states = 5,
 	.sr_exit_time_us = 16.5,
 	.sr_enter_plus_exit_time_us = 18.5,
-	.sr_exit_z8_time_us = 210.0,
-	.sr_enter_plus_exit_z8_time_us = 310.0,
+	.sr_exit_z8_time_us = 268.0,
+	.sr_enter_plus_exit_z8_time_us = 393.0,
 	.writeback_latency_us = 12.0,
 	.dram_channel_width_bytes = 4,
 	.round_trip_ping_latency_dcfclk_cycles = 106,


                 reply	other threads:[~2023-07-21  7:23 UTC|newest]

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