From d706fc64f3f5acb596a5fb19a91f5fee877748eb Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Wed, 18 Aug 2021 13:05:36 +0200
Subject: [PATCH] hack: poor man's DRM debugging

---
 device.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/device.c b/device.c
index 2a2a5d4..cf7d7fb 100644
--- a/device.c
+++ b/device.c
@@ -95,6 +95,8 @@ device_test_commit(struct liftoff_device *device, drmModeAtomicReq *req,
 {
 	int ret;
 
+	system("sudo dmesg -C");
+
 	flags &= ~DRM_MODE_PAGE_FLIP_EVENT;
 	do {
 		ret = drmModeAtomicCommit(device->drm_fd, req,
@@ -106,6 +108,9 @@ device_test_commit(struct liftoff_device *device, drmModeAtomicReq *req,
 		liftoff_log(LIFTOFF_ERROR, "drmModeAtomicCommit: %s",
 			    strerror(-ret));
 	}
+	if (ret == -EINVAL || ret == -ERANGE) {
+		system("sudo dmesg");
+	}
 
 	return ret;
 }