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

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: 6f8605fd7d11 ("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>

diff --git a/arch/arm64/boot/dts/ti/k3-am69-sk.dts b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
index e73f714b1230cd2c58aef211110c9f8adc0a99ce..988d7d83c6a79288ef34375cf3614786ded8408a 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am69-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
@@ -919,13 +919,9 @@
        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 {