commit 4004800d778e04f379c8306e5c5981f12fee4d3b
author Cindy Liu <hcindyl@google.com> Tue Jun 23 16:12:51 2020 -0700
committer Cindy Liu <hcindyl@google.com> Wed Jun 24 18:27:48 2020 -0700
tree d72c41075e6fc43a47111d443e1b8dfb21c0ea4c
parent 5354cf045c686b479310ce821a8df1251ce8044a

Add kernel log for HDMI hotplug event

The test will try to capture the dmesg update for the HDMI plug/unplug

Example output:
[  160.307914] mediatek-cec 1001a000.cec: hotplug event! cur hpd = 1, hpd = 0
[  160.337206] mediatek-cec 1001a000.cec: hotplug event! cur hpd = 0, hpd = 1

Change-Id: Iae611482707214a7d735bdd46ec6ad18e7ca1dd5

drivers/gpu/drm/mediatek/mtk_cec.c

diff --git a/drivers/gpu/drm/mediatek/mtk_cec.c b/drivers/gpu/drm/mediatek/mtk_cec.c
index 5ce84d0..491084b 100644
--- a/drivers/gpu/drm/mediatek/mtk_cec.c
+++ b/drivers/gpu/drm/mediatek/mtk_cec.c
@@ -178,7 +178,7 @@
 	hpd = mtk_cec_hpd_high(dev);
 
 	if (cec->hpd != hpd) {
-		dev_dbg(dev, "hotplug event! cur hpd = %d, hpd = %d\n",
+		dev_info(dev, "hotplug event! cur hpd = %d, hpd = %d\n",
 			cec->hpd, hpd);
 		cec->hpd = hpd;
 		mtk_cec_hpd_event(cec, hpd);