From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198

---
 kernel/drivers/gpu/drm/rockchip/rk628/rk628_combtxphy.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/drivers/gpu/drm/rockchip/rk628/rk628_combtxphy.c b/kernel/drivers/gpu/drm/rockchip/rk628/rk628_combtxphy.c
index 8cdb50c..cbe7923 100644
--- a/kernel/drivers/gpu/drm/rockchip/rk628/rk628_combtxphy.c
+++ b/kernel/drivers/gpu/drm/rockchip/rk628/rk628_combtxphy.c
@@ -366,6 +366,10 @@
 		ref_clk = clk_get_rate(combtxphy->ref_clk) / 1000; /* khz */
 		if (combtxphy->division_mode)
 			ref_clk /= 2;
+
+		if (!ref_clk)
+			return -EINVAL;
+
 		/*
 		 * the reference clock at PFD(FPFD = ref_clk / ref_div) about
 		 * 25MHz is recommende, FPFD must range from 16MHz to 35MHz,

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