drm_hwcomposer: CI: Add job to run with writeback

Currently VtsHalGraphicsComposer3_TargetTest is run without a writeback
connector enabled. Use the configurable vkms driver to create a writeback
connector and run VtsHalGraphicsComposer3_TargetTest.

This job should help to catch errors that arise only for writeback
connectors.

Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>

.ci/android/writeback.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+# shellcheck disable=SC1091 # no need to follow references to other shell scripts
+
+set -e
+
+EXIT_CODE=1
+
+source "${CI_PROJECT_DIR}/.ci/android/vts-runner.sh"
+
+fdo_log_section_start_collapsed run_vts_vkms_writeback "run_vts_vkms_writeback"
+reload_vkms
+configure_vkms
+stop_hwc
+adb shell "echo 0 > ${VKMS_DIR}/enabled"
+adb shell "echo 1 > ${VKMS_DIR}/crtcs/CRTC_0/writeback"   # enabled=1
+adb shell "echo 1 > ${VKMS_DIR}/enabled"
+print_vkms_config
+start_hwc
+
+set +e
+run_vts "writeback"
+# shellcheck disable=SC2034
+export EXIT_CODE=$?
+fdo_log_section_end run_vts_vkms_writeback

.gitlab-ci.yml

@@ -144,3 +144,21 @@ vts-headless:
     expire_in: 1 week
   tags:
     - kvm
+
+vts-writeback:
+  stage: android
+  extends:
+    .use-ubuntu/x86_64_android
+  script:
+    - "${CI_PROJECT_DIR}/.ci/android/writeback.sh"
+  needs:
+    - job: build_x86_64
+      artifacts: true
+    - job: ubuntu/x86_64_android
+  artifacts:
+    paths:
+      - "${RESULTS_DIR}"
+    when: always
+    expire_in: 1 week
+  tags:
+    - kvm