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arm64: dts: qcom: sc7280: Add MDSS_CORE reset to mdss

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Like on other platforms, if the OS does not support recovering the state
left by the bootloader it needs access to MDSS_CORE, so that it can
clear the MDSS configuration.

Until now it seems no version of the bootloaders have done so, but e.g.
the Particle Tachyon ships with a bootloader that does leave the display
in a state that results in a series of iommu faults.

So let's provide the reset, to allow the OS to clear that state.

Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250811-sc7280-mdss-reset-v1-3-83ceff1d48de@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Bjorn Andersson 2025-08-11 22:11:35 -05:00 committed by Bjorn Andersson
parent c46d34c044
commit 9cdb77e310
1 changed files with 2 additions and 0 deletions
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arch/arm64/boot/dts/qcom/sc7280.dtsi
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@ -4847,6 +4847,8 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
iommus = <&apps_smmu 0x900 0x402>;
resets = <&dispcc DISP_CC_MDSS_CORE_BCR>;
#address-cells = <2>;
#size-cells = <2>;
ranges;