[PATCH 2/5] media: Documentation: it6625: document the audio controls

[Hermes Wu via B4 Relay]

From: Hermes Wu <Hermes.wu@xxxxxxxxxx>

The IT6625 driver exposes two read-only driver-specific controls,
V4L2_CID_IT6625_AUDIO_SAMPLING_RATE and V4L2_CID_IT6625_AUDIO_PRESENT,
which so far are described only in the uAPI header.

Add a page for the driver to the V4L2 driver-specific documentation that
describes both controls, and list it in MAINTAINERS.

Signed-off-by: Hermes Wu <Hermes.wu@xxxxxxxxxx>
---
 Documentation/userspace-api/media/drivers/index.rst  |  1 +
 Documentation/userspace-api/media/drivers/it6625.rst | 18 ++++++++++++++++++
 MAINTAINERS                                          |  1 +
 3 files changed, 20 insertions(+)

diff --git a/Documentation/userspace-api/media/drivers/index.rst b/Documentation/userspace-api/media/drivers/index.rst
index 8d2c489b8453e11b8e15ef9d9c1c0312f3da06af..57be8dd5749d7f5aa6e0e21c7e3d89d377a209d0 100644
--- a/Documentation/userspace-api/media/drivers/index.rst
+++ b/Documentation/userspace-api/media/drivers/index.rst
@@ -33,6 +33,7 @@ For more details see the file COPYING in the source distribution of Linux.
 	dcmipp
 	dw100
 	imx-uapi
+	it6625
 	mali-c55
 	max2175
 	npcm-video
diff --git a/Documentation/userspace-api/media/drivers/it6625.rst b/Documentation/userspace-api/media/drivers/it6625.rst
new file mode 100644
index 0000000000000000000000000000000000000000..efd970e8124979abffb6f9ba3ea1e1bc193820b3
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/it6625.rst
@@ -0,0 +1,18 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+ITE IT6625/IT6626 HDMI to MIPI bridge driver
+============================================
+
+The IT6625 driver implements the following driver-specific controls. All of
+them are read-only and describe the audio of the HDMI input.
+
+``V4L2_CID_IT6625_AUDIO_SAMPLING_RATE (integer)``
+-------------------------------------------------
+    The sampling rate of the HDMI audio stream, in Hz. 0 means that the rate
+    is not available: there is no stable input signal or no audio, the bridge
+    reported a rate code that the driver does not recognize, or reading the
+    audio status failed.
+
+``V4L2_CID_IT6625_AUDIO_PRESENT (boolean)``
+-------------------------------------------
+    Whether the bridge currently receives HDMI audio.
diff --git a/MAINTAINERS b/MAINTAINERS
index 760791e3635f3c306e7fed7240b948d29b45ae66..1d6de374d86d3046d993bf220195b1a75049fa8a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13972,6 +13972,7 @@ M:	Hermes Wu <Hermes.Wu@xxxxxxxxxx>
 S:	Maintained
 T:	git git://linuxtv.org/media.git
 F:	Documentation/devicetree/bindings/media/i2c/ite,it6625.yaml
+F:	Documentation/userspace-api/media/drivers/it6625.rst
 F:	drivers/media/i2c/it6625.c
 F:	include/uapi/linux/it6625.h
 

-- 
2.34.1