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arm64: dts: ti: k3-am69-sk: remove assigned-clock-parents for unused VP

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BugLink: https://bugs.launchpad.net/bugs/2060097

[ Upstream commit cfdb4f7ffdb855c1a3d274dc7757e780dcbf2d55 ]

VP2 and VP3 are unused video ports and VP3 share the same parent
clock as VP1 causing issue with pixel clock setting for HDMI (VP1).
The current DM firmware does not support changing parent clock if it
is shared by another component. It returns 0 for the determine_rate
query before causing set_rate to set the clock at default maximum of
1.8GHz which is a lot more than the maximum frequency videoports can
support (600MHz) causing SYNC LOST issues.
So remove the parent clocks for unused VPs to avoid conflict.

Fixes: 6f8605fd7d ("arm64: dts: ti: k3-am69-sk: Add DP and HDMI support")
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Aradhya Bhatia <a-bhatia1@ti.com>
Tested-by: Enric Balletbo i Serra <eballetbo@redhat.com>
Link: https://lore.kernel.org/r/20240201142308.4954-1-j-choudhary@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit f8b7bad1506436462237ac38b57d39c737888f46)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
This commit is contained in:
Jayesh Choudhary
2024-02-01 19:53:08 +05:30
committed by Roxana Nicolescu
parent f95f885f58
commit f8fae28c90
1 changed files with 2 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm64/boot/dts/ti/k3-am69-sk.dts
+2 -6
View File
@@ -918,13 +918,9 @@
pinctrl-names = "default";
pinctrl-0 = <&dss_vout0_pins_default>;
assigned-clocks = <&k3_clks 218 2>,
<&k3_clks 218 5>,
<&k3_clks 218 14>,
<&k3_clks 218 18>;
<&k3_clks 218 5>;
assigned-clock-parents = <&k3_clks 218 3>,
<&k3_clks 218 7>,
<&k3_clks 218 16>,
<&k3_clks 218 22>;
<&k3_clks 218 7>;
};
&serdes_wiz4 {