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The non-pixel stream must be limited to the 0-600 MB IOVA range, while the pixel stream can use the full IOVA space. Using a single set of IOMMU entries for the Iris node does not describe these per-stream limits and can allow accesses outside the supported range, which may lead to device crashes. One such issue was reported at: https://gitlab.freedesktop.org/drm/msm/-/work_items/100 Add non-pixel and pixel child nodes, move each stream ID to its corresponding child node, and add a reserved IOVA range for the non-pixel stream. Co-developed-by: Vishnu Reddy Signed-off-by: Vishnu Reddy Signed-off-by: Vikash Garodia --- arch/arm64/boot/dts/qcom/lemans.dtsi | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi index a10322c5bc35754042640d56ecb556a5ed5cf281..90c300461b5029b4084b8b28130cd826155e4cbb 100644 --- a/arch/arm64/boot/dts/qcom/lemans.dtsi +++ b/arch/arm64/boot/dts/qcom/lemans.dtsi @@ -879,6 +879,10 @@ cpucp_fw_mem: cpucp-fw@db200000 { reg = <0x0 0xdb200000 0x0 0x100000>; no-map; }; + + iris_resv: reservation-iris { + iommu-addresses = <&iris_non_pixel 0x0 0x0 0x0 0x25800000>; + }; }; smp2p-adsp { @@ -4978,12 +4982,22 @@ &config_noc SLAVE_VENUS_CFG QCOM_ICC_TAG_ACTIVE_ONLY>, resets = <&gcc GCC_VIDEO_AXI0_CLK_ARES>; reset-names = "bus"; - iommus = <&apps_smmu 0x0880 0x0400>, - <&apps_smmu 0x0887 0x0400>; dma-coherent; + #address-cells = <2>; + #size-cells = <2>; + status = "disabled"; + iris_non_pixel: non-pixel { + iommus = <&apps_smmu 0x0880 0x0400>; + memory-region = <&iris_resv>; + }; + + iris_pixel: pixel { + iommus = <&apps_smmu 0x0887 0x0400>; + }; + iris_opp_table: opp-table { compatible = "operating-points-v2"; -- 2.34.1