media: i2c: add lt6911uxe hdmi bridge driver

Lontium LT9611UXE is a HDMI to MIPI CSI-2 bridge. The device supports
modes up to 4k@60fps, obtains the video information and switches the
current mode once the video signal changes.

Signed-off-by: Dongcheng Yan <dongcheng.yan@intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
[hverkuil: fix smatch warning: missing error code 'ret']
[hverkuil: fix coccinelle IRQF_ONESHOT warning]

drivers/media/i2c/Kconfig

@@ -1147,6 +1147,17 @@ config VIDEO_ISL7998X
 	  Support for Intersil ISL7998x analog to MIPI-CSI2 or
 	  BT.656 decoder.
 
+config VIDEO_LT6911UXE
+	tristate "Lontium LT6911UXE decoder"
+	depends on ACPI && VIDEO_DEV
+	select V4L2_FWNODE
+	help
+	  This is a Video4Linux2 sensor-level driver for the Lontium
+	  LT6911UXE HDMI to MIPI CSI-2 bridge.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called lt6911uxe.
+
 config VIDEO_KS0127
 	tristate "KS0127 video decoder"
 	depends on VIDEO_DEV && I2C

drivers/media/i2c/Makefile

@@ -64,6 +64,7 @@ obj-$(CONFIG_VIDEO_ISL7998X) += isl7998x.o
 obj-$(CONFIG_VIDEO_KS0127) += ks0127.o
 obj-$(CONFIG_VIDEO_LM3560) += lm3560.o
 obj-$(CONFIG_VIDEO_LM3646) += lm3646.o
+obj-$(CONFIG_VIDEO_LT6911UXE) += lt6911uxe.o
 obj-$(CONFIG_VIDEO_M52790) += m52790.o
 obj-$(CONFIG_VIDEO_MAX9271_LIB) += max9271.o
 obj-$(CONFIG_VIDEO_MAX9286) += max9286.o