linux-kernel - Re: [PATCH] arm64: defconfig: Enable QCOM

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Date:   Thu, 19 Nov 2020 18:19:26 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Olof Johansson <olof@...om.net>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH] arm64: defconfig: Enable QCOM_SCM as builtin

On 18-11-20, 08:25, Bjorn Andersson wrote:
> The Qualcomm SCM driver was never explicitly enabled in the defconfig.
> Instead it was (apparently) selected by DRM_MSM and by the recent change
> to make it tristate now became =m.
> 
> Unfortunately this removes the ability for PINCTRL_MSM and ARM_SMMU to
> be =y and with deferred_probe_timeout defaulting to 0 this means that
> things such as UART, USB, PCIe and SDHCI probes with their dependencies
> ignored.
> 
> The lack of pinctrl results in invalid pin configuration and the lack of
> iommu results in the system locking up as soon as any form of data
> transfer is attempted from any of the affected peripherals.
> 
> Mark QCOM_SCM as builtin, to avoid this.

Reviewed-by: Vinod Koul <vkoul@...nel.org>

-- 
~Vinod