On Sat, 9 Sept 2023 at 18:16, gregkh@linuxfoundation.org wrote:

This is a note to let you know that I've just added the patch titled

arm64: dts: qcom: sdm845-db845c: Mark cont splash memory region as reserved

to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: arm64-dts-qcom-sdm845-db845c-mark-cont-splash-memory-region-as-reserved.patch and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

Please skip this patch for 5.10.y. We ran into a boot (mdss crash) regression with this patch.

Regards, Amit Pundir

From 110e70fccce4f22b53986ae797d665ffb1950aa6 Mon Sep 17 00:00:00 2001 From: Amit Pundir amit.pundir@linaro.org Date: Wed, 26 Jul 2023 18:57:19 +0530 Subject: arm64: dts: qcom: sdm845-db845c: Mark cont splash memory region as reserved

From: Amit Pundir amit.pundir@linaro.org

commit 110e70fccce4f22b53986ae797d665ffb1950aa6 upstream.

Adding a reserved memory region for the framebuffer memory (the splash memory region set up by the bootloader).

It fixes a kernel panic (arm-smmu: Unhandled context fault at this particular memory region) reported on DB845c running v5.10.y.

Cc: stable@vger.kernel.org # v5.10+ Reviewed-by: Caleb Connolly caleb.connolly@linaro.org Signed-off-by: Amit Pundir amit.pundir@linaro.org Acked-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Link: https://lore.kernel.org/r/20230726132719.2117369-2-amit.pundir@linaro.org Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

---

arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 9 +++++++++ 1 file changed, 9 insertions(+)

--- a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts +++ b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts @@ -85,6 +85,14 @@ }; };

•   reserved-memory {
  

•           /* Cont splash region set up by the bootloader */
  

•           cont_splash_mem: framebuffer@9d400000 {
  

•                   reg = <0x0 0x9d400000 0x0 0x2400000>;
  

•                   no-map;
  

•           };
  

•   };
  

•   lt9611_1v8: lt9611-vdd18-regulator {
            compatible = "regulator-fixed";
            regulator-name = "LT9611_1V8";
  

@@ -482,6 +490,7 @@ };

&mdss {

•   memory-region = <&cont_splash_mem>;
    status = "okay";
  

};

Patches currently in stable-queue which might be from amit.pundir@linaro.org are

queue-5.10/arm64-dts-qcom-sdm845-db845c-mark-cont-splash-memory-region-as-reserved.patch