This is a note to let you know that I've just added the patch titled arm64: dts: qcom: sdm845: use dispcc AHB clock for mdss node to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arm64-dts-qcom-sdm845-use-dispcc-ahb-clock-for-mdss-.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit a03f908e9c06f726d471c976317a749a1bc06e06 Author: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Date: Tue May 31 15:47:35 2022 +0300 arm64: dts: qcom: sdm845: use dispcc AHB clock for mdss node [ Upstream commit 3ba500dee327e0261e728edec8a4f2f563d2760c ] 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: 08c2a076d18f ("arm64: dts: qcom: sdm845: Add dpu to sdm845 dts file") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220531124735.1165582-1-dmitry.baryshkov@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi index d20eacfc1017..ea7a272d267a 100644 --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi @@ -4147,7 +4147,7 @@ mdss: mdss@ae00000 { 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";