arm64: dts: qcom: sdm845: use dispcc AHB clock for mdss node

It was noticed that on sdm845 after an MDSS suspend/resume cycle the
driver can not read HW_REV registers properly (they will return 0
instead). Chaning the "iface" clock from <&gcc GCC_DISP_AHB_CLK> to
<&dispcc DISP_CC_MDSS_AHB_CLK> fixes the issue.

Fixes: 20c2970ff65e ("arm64: dts: qcom: sdm845: Add dpu to sdm845 dts file")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220531124735.1165582-1-dmitry.baryshkov@linaro.org

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 0692ae0e60a42dfce746510e412a1e92afea0269..038538c8c6141686dcb0d6d8dda20afa7ffe052b 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -4244,7 +4244,7 @@
 
                        power-domains = <&dispcc MDSS_GDSC>;
 
-                       clocks = <&gcc GCC_DISP_AHB_CLK>,
+                       clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
                                 <&dispcc DISP_CC_MDSS_MDP_CLK>;
                        clock-names = "iface", "core";