Re: [PATCH v5 0/3] arm64: dts: qcom: add dts for sa8540p-ride board

[Brian Masney <bmasney@redhat.com>]

On Mon, Oct 03, 2022 at 06:24:40PM +0530, Parikshit Pareek wrote:
> Parikshit Pareek (3):
>   dt-bindings: arm: qcom: Document additional sa8540p device
>   arm64: dts: qcom: sa8295p: move common nodes to dtsi
>   arm64: dts: qcom: introduce sa8540p-ride dts

For the series:

Reviewed-by: Brian Masney <bmasney@redhat.com>
Tested-by: Brian Masney <bmasney@redhat.com>


Just for documentation purposes, to get linux-next-20220930 booting on
the QDrive3 with the upstream arm64 defconfig I had to apply the
following patches:

- arm64: dts: qcom: sc8280xp: fix UFS PHY serdes size
  https://lore.kernel.org/linux-arm-msm/20220915141601.18435-1-johan+linaro@kernel.org/

  Without this, the phy fails to probe due to the following error:

    qcom-qmp-ufs-phy 1d87000.phy: can't request region for resource [mem 0x01d87400-0x01d87507]
    qcom-qmp-ufs-phy 1d87000.phy: failed to create lane0 phy, -16
    qcom-qmp-ufs-phy: probe of 1d87000.phy failed with error -16

- This hack patch is still needed:
  disable has_address_auth_metacap and has_generic_auth
  https://github.com/andersson/kernel/commit/d46a4d05d5a17ff4447af08471edd78e194d48e5

  Without this, the boot hangs at:

    rcu: srcu_init: Setting srcu_struct sizes based on contention.
    arch_timer: cp15 and mmio timer(s) running at 19.20MHz (virt/virt).
    clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
    sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns

- My UFS clock patch is still needed:
  arm64: dts: qcom: sc8280xp: correct ref_aux clock for ufs_mem_phy
  https://lore.kernel.org/lkml/20220830180120.2082734-1-bmasney@redhat.com/T/#u

- I didn't use an initrd for testing so I had to change the options
  CONFIG_SCSI_UFS_QCOM and CONFIG_PHY_QCOM_QMP from =m to =y.

Brian