With 5.4 + arm64 defconfig, db820c fails to boot to userspace: crashes right before mounting rootfs, and resets back to LK (Bjorn pushed a series of dts changes to support the IFC6640[1] out of msm8996, and i thought 5.4 was in a good state for this SoC). To get a basic set of features working (mmc, ufs, eth, usb, etc), i had to cherry-pick a couple of patches and config changes from Linaro 4.14[2], and revert an upstream qmp patch: 1) these two cherry-picks from Linaro 4.14 fix the broken mmc[3]. clk: qcom: Drop gcc_aggre1_pnoc_ahb_clk clock arm64: dts: qcom: msm8996: Disable USB2 PHY suspend by core 2) without these =y config changes, UFS refuses to init[4]. arm64: defconfig: PHY_QCOM_QMP=y arm64: defconfig: PHY_QCOM_QUSB2=y arm64: defconfig: PHY_QCOM_UFS=y 3) without this upstream revert, pci, ethernet and are wifi dead[5]. Revert "phy: qcom-qmp: Correct ready status, again" 4) with all the above patches applied, msm_drm still complain about clks, but at least the board is up, running and reachable[6]. Any thoughts from the author of these patches or the ml? In particular, the =y config changes are bothering me because we are clearly pushing problems under the rug. 1: https://lkml.org/lkml/2019/10/21/15 2: https://git.linaro.org/landing-teams/working/qualcomm/kernel.git/log/?h=release/qcomlt-4.14 3: https://pastebin.com/DDHvZD6Q 4: https://pastebin.com/hmPVqNqs 5: https://pastebin.com/fMqtH8u5 6: https://pastebin.com/irGv9Qmb Amit Pundir (1): clk: qcom: Drop gcc_aggre1_pnoc_ahb_clk clock Manu Gautam (1): arm64: dts: qcom: msm8996: Disable USB2 PHY suspend by core Paolo Pisati (4): Revert "phy: qcom-qmp: Correct ready status, again" arm64: defconfig: PHY_QCOM_QMP=y arm64: defconfig: PHY_QCOM_QUSB2=y arm64: defconfig: PHY_QCOM_UFS=y arch/arm64/boot/dts/qcom/msm8996.dtsi | 4 ++++ arch/arm64/configs/defconfig | 5 +++-- drivers/clk/qcom/gcc-msm8996.c | 15 --------------- drivers/phy/qualcomm/phy-qcom-qmp.c | 33 +++++++++++++++++---------------- 4 files changed, 24 insertions(+), 33 deletions(-) -- 2.7.4
