[PATCH 0/6] msm8996: db820c: Fix mmc/ufs and get 5.4 to userspace

Paolo Pisati
2019-12-05T16:15:10Z

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(-)

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2.7.4