linux-kernel - Re: [PATCH v3 3/9] drm: ci: Force db410c to host mode

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Date:   Tue, 12 Sep 2023 13:52:19 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     Vignesh Raman <vignesh.raman@...labora.com>,
        dri-devel@...ts.freedesktop.org
Cc:     guilherme.gallo@...labora.com, sergi.blanch.torne@...labora.com,
        david.heidelberg@...labora.com, daniels@...labora.com,
        gustavo.padovan@...labora.com,
        angelogioacchino.delregno@...labora.com, emma@...olt.net,
        robclark@...edesktop.org, robdclark@...gle.com, anholt@...gle.com,
        robdclark@...il.com, airlied@...il.com, daniel@...ll.ch,
        jani.nikula@...ux.intel.com, mripard@...nel.org,
        dmitry.baryshkov@...aro.org, matthias.bgg@...il.com,
        agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        virtualization@...ts.linux-foundation.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v3 3/9] drm: ci: Force db410c to host mode



On 08/09/2023 12:22, Vignesh Raman wrote:
> Force db410c to host mode to fix network issue which results in failure
> to mount root fs via NFS.
> See https://gitlab.freedesktop.org/gfx-ci/linux/-/commit/cb72a629b8c15c80a54dda510743cefd1c4b65b8
> 
> Compile the base device tree with overlay support and use fdtoverlay
> command to merge base device tree with an overlay which contains the
> fix for USB controllers to work in host mode. [suggested by Maxime Ripard]
> 
> Suggested-by: Maxime Ripard <mripard@...nel.org>
> Signed-off-by: Vignesh Raman <vignesh.raman@...labora.com>

Acked-by: Helen Koike <helen.koike@...labora.com>

> ---
> 
> v2:
>    - Use fdtoverlay command to merge overlay dtbo with the base dtb instead of modifying the kernel sources
> 
> v3:
>    - drm-ci scripts to use device tree overlay from arch/arm64/boot/dts/qcom and compile base device tree with overlay support
> 
> ---
>   drivers/gpu/drm/ci/build.sh | 7 ++++++-
>   1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/ci/build.sh b/drivers/gpu/drm/ci/build.sh
> index 7b014287a041..092c195af242 100644
> --- a/drivers/gpu/drm/ci/build.sh
> +++ b/drivers/gpu/drm/ci/build.sh
> @@ -91,7 +91,12 @@ for image in ${KERNEL_IMAGE_NAME}; do
>   done
>   
>   if [[ -n ${DEVICE_TREES} ]]; then
> -    make dtbs
> +    make DTC_FLAGS=-@ dtbs
> +    if [[ -e arch/arm64/boot/dts/qcom/apq8016-sbc.dtb ]]; then
> +        dtc -@ -I dts -O dtb -o arch/arm64/boot/dts/qcom/apq8016-sbc-usb-host.dtbo arch/arm64/boot/dts/qcom/apq8016-sbc-usb-host.dtso
> +        fdtoverlay -i arch/arm64/boot/dts/qcom/apq8016-sbc.dtb -o arch/arm64/boot/dts/qcom/apq8016-sbc-usb-host.dtb arch/arm64/boot/dts/qcom/apq8016-sbc-usb-host.dtbo
> +        mv arch/arm64/boot/dts/qcom/apq8016-sbc-usb-host.dtb arch/arm64/boot/dts/qcom/apq8016-sbc.dtb
> +    fi
>       cp ${DEVICE_TREES} /lava-files/.
>   fi
>