From c09ea6b1244b6b2e8adb0496b99ba61a54acc671 Mon Sep 17 00:00:00 2001
From: grawis <a0902110331@gmail.com>
Date: Wed, 10 Jun 2026 21:28:04 +0800
Subject: [PATCH 1/2] Add automated V4L2 test workflow

---
 .gitignore           |  3 ++
 Makefile             |  4 +++
 scripts/test-v4l2.sh | 65 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+)
 create mode 100755 scripts/test-v4l2.sh

diff --git a/.gitignore b/.gitignore
index 5b6d0f3..555be10 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,6 @@ Module.symvers
 Mkfile.old
 dkms.conf
 vcam-util
+
+# Test artifacts
+artifacts/
diff --git a/Makefile b/Makefile
index 91eb70d..69af1aa 100644
--- a/Makefile
+++ b/Makefile
@@ -17,3 +17,7 @@ kmod:
 clean:
 	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
 	$(RM) vcam-util
+
+.PHONY: test-v4l2
+test-v4l2:
+	./scripts/test-v4l2.sh
diff --git a/scripts/test-v4l2.sh b/scripts/test-v4l2.sh
new file mode 100755
index 0000000..44d078f
--- /dev/null
+++ b/scripts/test-v4l2.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+ARTIFACT_DIR="${ROOT_DIR}/artifacts/v4l2-$(date +%Y%m%d-%H%M%S)"
+LOG="${ARTIFACT_DIR}/test.log"
+
+mkdir -p "${ARTIFACT_DIR}"
+exec > >(tee -a "${LOG}") 2>&1
+
+cd "${ROOT_DIR}"
+
+echo "== Environment =="
+uname -a
+echo
+
+echo "== Build =="
+make clean
+make
+echo
+
+echo "== Load dependencies =="
+sudo modprobe -a videobuf2_vmalloc videobuf2_v4l2 videobuf2_dma_contig
+echo
+
+echo "== Reload vcam =="
+sudo rmmod vcam 2>/dev/null || true
+sudo insmod vcam.ko
+echo
+
+echo "== Detect video device =="
+sudo ./vcam-util -l | tee "${ARTIFACT_DIR}/vcam-util-list.txt"
+VIDEO_DEV="$(sudo ./vcam-util -l |
+    awk '/\/dev\/video[0-9]+/ {print $NF; exit}')"
+
+if [[ -z "${VIDEO_DEV}" ]]; then
+    echo "ERROR: cannot find a vcam video device"
+    exit 1
+fi
+
+echo "VIDEO_DEV=${VIDEO_DEV}" | tee "${ARTIFACT_DIR}/device.env"
+echo
+
+echo "== v4l2-compliance =="
+sudo v4l2-compliance -d "${VIDEO_DEV}" -f |
+    tee "${ARTIFACT_DIR}/v4l2-compliance.txt"
+echo
+
+echo "== v4l2-ctl --all =="
+sudo v4l2-ctl -d "${VIDEO_DEV}" --all |
+    tee "${ARTIFACT_DIR}/v4l2-ctl-all.txt"
+echo
+
+echo "== v4l2-ctl --list-formats-ext =="
+sudo v4l2-ctl -d "${VIDEO_DEV}" --list-formats-ext |
+    tee "${ARTIFACT_DIR}/v4l2-formats-ext.txt"
+echo
+
+echo "== dmesg tail =="
+sudo dmesg | tail -n 100 |
+    tee "${ARTIFACT_DIR}/dmesg-tail.txt" || true
+echo
+
+echo "Artifacts saved to: ${ARTIFACT_DIR}"

From d30c6cbad52767caf6da53198079aea9eefbc56b Mon Sep 17 00:00:00 2001
From: grawis <a0902110331@gmail.com>
Date: Wed, 10 Jun 2026 22:05:33 +0800
Subject: [PATCH 2/2] Fix V4L2 device detection in test script

---
 scripts/test-v4l2.sh | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/scripts/test-v4l2.sh b/scripts/test-v4l2.sh
index 44d078f..e9389cf 100755
--- a/scripts/test-v4l2.sh
+++ b/scripts/test-v4l2.sh
@@ -30,9 +30,13 @@ sudo insmod vcam.ko
 echo
 
 echo "== Detect video device =="
-sudo ./vcam-util -l | tee "${ARTIFACT_DIR}/vcam-util-list.txt"
-VIDEO_DEV="$(sudo ./vcam-util -l |
-    awk '/\/dev\/video[0-9]+/ {print $NF; exit}')"
+VCAM_LIST="$(sudo ./vcam-util -l)"
+printf '%s\n' "${VCAM_LIST}" | tee "${ARTIFACT_DIR}/vcam-util-list.txt"
+VIDEO_DEV="$(printf '%s\n' "${VCAM_LIST}" |
+    awk 'match($0, /\/dev\/video[0-9]+/) {
+        print substr($0, RSTART, RLENGTH)
+        exit
+    }')"
 
 if [[ -z "${VIDEO_DEV}" ]]; then
     echo "ERROR: cannot find a vcam video device"