This is a note to let you know that I've just added the patch titled
drm/amd/display: Send DTBCLK disable message on first commit
to the 6.8-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-send-dtbclk-disable-message-on-first.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3d1629445de53486915343e4bc4b3fda7aa0fb91
Author: Taimur Hassan <syed.hassan@xxxxxxx>
Date: Tue Jan 16 18:10:54 2024 -0500
drm/amd/display: Send DTBCLK disable message on first commit
[ Upstream commit f341055b10bd8be55c3c995dff5f770b236b8ca9 ]
[Why]
Previous patch to allow DTBCLK disable didn't address boot case. Driver
thinks DTBCLK is disabled by default, so we don't send disable message to
PMFW. DTBCLK is then enabled at idle desktop on boot, burning power.
[How]
Set dtbclk_en to true on boot so that disable message is sent during first
commit.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Acked-by: Tom Chung <chiahsuan.chung@xxxxxxx>
Signed-off-by: Taimur Hassan <syed.hassan@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@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/clk_mgr/dcn35/dcn35_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
index 9cbab880c6233..f07629694ec5e 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
@@ -415,6 +415,7 @@ void dcn35_init_clocks(struct clk_mgr *clk_mgr)
memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
// Assumption is that boot state always supports pstate
+ clk_mgr->clks.dtbclk_en = true;
clk_mgr->clks.ref_dtbclk_khz = ref_dtbclk; // restore ref_dtbclk
clk_mgr->clks.p_state_change_support = true;
clk_mgr->clks.prev_p_state_change_support = true;
