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

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Message-Id: <20230908152225.432139-4-vignesh.raman@collabora.com>
Date:   Fri,  8 Sep 2023 20:52:19 +0530
From:   Vignesh Raman <vignesh.raman@...labora.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     helen.koike@...labora.com, 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: [PATCH v3 3/9] drm: ci: Force db410c to host mode

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>
---

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
 
-- 
2.40.1