rockchip64-6.14: add patch to fix rk3588 multi hdmi pll clk

patch/kernel/archive/rockchip64-6.14/rk3588-0134-clk-check-for-disabled-clock-provider-in-of_clk_get_.patch

@@ -0,0 +1,52 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Heiko Stuebner <heiko@sntech.de>
+Date: Thu, 20 Feb 2025 23:54:48 +0100
+Subject: clk: check for disabled clock-provider in of_clk_get_hw_from_clkspec
+
+of_clk_get_hw_from_clkspec checks all available clock-providers by
+compairing their of-nodes to the one from the clkspec. If no matching
+clock-provider is found, the function returns EPROBE_DEFER to cause a
+re-check at a later date.
+
+If a matching clock-provider is found, a authoritative answer can be
+retrieved from it whether the clock exists or not.
+
+This does not take into account that the clock-provider may never appear,
+because it's node is disabled. This can happen for example when a clock
+is optional, provided by a separate block which just never gets enabled.
+
+One example of this happening is the rk3588's VOP, which has optional
+additional display-clock-supplies coming from PLLs inside the hdmiphy
+blocks. These can be used for better rates, but the system will also
+work without them.
+
+The problem around that is described in the followups to:
+https://lore.kernel.org/dri-devel/20250215-vop2-hdmi1-disp-modes-v1-3-81962a7151d6@collabora.com/
+
+As we already know the of-node of the presumed clock-provider, just add
+a check via of_device_is_available whether this is a "valid" device node.
+This prevents ethernal defer-loops.
+
+Signed-off-by: Heiko Stuebner <heiko@sntech.de>
+---
+ drivers/clk/clk.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
+index 111111111111..222222222222 100644
+--- a/drivers/clk/clk.c
++++ b/drivers/clk/clk.c
+@@ -5258,6 +5258,10 @@ of_clk_get_hw_from_clkspec(struct of_phandle_args *clkspec)
+ 	if (!clkspec)
+ 		return ERR_PTR(-EINVAL);
+
++	/* Check if node in clkspec is in disabled/fail state */
++	if (!of_device_is_available(clkspec->np))
++		return ERR_PTR(-ENOENT);
++
+ 	mutex_lock(&of_clk_mutex);
+ 	list_for_each_entry(provider, &of_clk_providers, link) {
+ 		if (provider->node == clkspec->np) {
+-- 
+Armbian
+