linux-kernel - [PATCH v2 2/7] drm: ci: Force db410c to host mode

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Message-Id: <20230904161516.66751-3-vignesh.raman@collabora.com>
Date:   Mon,  4 Sep 2023 21:45:11 +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,
        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,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        virtualization@...ts.linux-foundation.org,
        linux-arm-msm@...r.kernel.org
Subject: [PATCH v2 2/7] 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

Use fdtoverlay command to merge base device tree with an overlay
which contains the fix for USB controllers to work in host mode.

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
  
---
 drivers/gpu/drm/ci/build.sh                         |  5 +++++
 .../gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dts  | 13 +++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 drivers/gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dts

diff --git a/drivers/gpu/drm/ci/build.sh b/drivers/gpu/drm/ci/build.sh
index 7b014287a041..92ffd98cd09e 100644
--- a/drivers/gpu/drm/ci/build.sh
+++ b/drivers/gpu/drm/ci/build.sh
@@ -92,6 +92,11 @@ done
 
 if [[ -n ${DEVICE_TREES} ]]; then
     make dtbs
+    if [[ -e arch/arm64/boot/dts/qcom/apq8016-sbc.dtb ]]; then
+        dtc -@ -I dts -O dtb -o drivers/gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dtbo drivers/gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dts
+        fdtoverlay -i arch/arm64/boot/dts/qcom/apq8016-sbc.dtb -o arch/arm64/boot/dts/qcom/apq8016-sbc-overlay.dtb drivers/gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dtbo
+        mv arch/arm64/boot/dts/qcom/apq8016-sbc-overlay.dtb arch/arm64/boot/dts/qcom/apq8016-sbc.dtb
+    fi
     cp ${DEVICE_TREES} /lava-files/.
 fi
 
diff --git a/drivers/gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dts b/drivers/gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dts
new file mode 100644
index 000000000000..57b7604f1c23
--- /dev/null
+++ b/drivers/gpu/drm/ci/dt-overlays/apq8016-sbc-overlay.dts
@@ -0,0 +1,13 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+    fragment@0 {
+        target-path = "/soc@0";
+        __overlay__ {
+            usb@...9000 {
+                dr_mode = "host";
+            };
+        };
+    };
+};
-- 
2.40.1