On 4/8/20 5:32 AM, Fabio Estevam wrote:
Improve the documentation by providing examples on how to test camera
capture on imx6q-sabresd via v4l2-ctl and Gstreamer.
Signed-off-by: Fabio Estevam <festevam@xxxxxxxxx>
---
Documentation/media/v4l-drivers/imx.rst | 42 +++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/Documentation/media/v4l-drivers/imx.rst b/Documentation/media/v4l-drivers/imx.rst
index 37b944f12d93..c872cc84d9fc 100644
--- a/Documentation/media/v4l-drivers/imx.rst
+++ b/Documentation/media/v4l-drivers/imx.rst
@@ -670,6 +670,28 @@ Streaming can then begin on "ipu1_ic_prpenc capture" node. The v4l2-ctl
tool can be used to select any supported YUV or RGB pixelformat on the
capture device node.
+In order to determine what is the /dev/video node correspondent to
+"ipu1_ic_prpenc":
+
+.. code-block:: none
+
+ # dmesg | grep ipu1_ic_prpenc | grep Registered
A better way is to use "media-ctl -e":
# media-ctl -e "ipu1_ic_prpenc capture"
/dev/video1
Grepping from dmesg can fail when the log fills up and pushes out the
boot "Registered ..." messages.
Steve
+ ipu1_ic_prpenc: Registered ipu1_ic_prpenc capture as /dev/video1
+
+/dev/video1 is the streaming element in this case.
+
+Starting the streaming via v4l2-ctl:
+
+.. code-block:: none
+
+ v4l2-ctl --stream-mmap -d /dev/video1
+
+Starting the streaming via Gstreamer and sending the content to the display:
+
+.. code-block:: none
+
+ gst-launch-1.0 v4l2src device=/dev/video1 ! kmssink
+
The following example configures unprocessed video capture pipeline to
capture from the OV5640, transmitting on MIPI CSI-2 virtual channel 0:
@@ -690,6 +712,26 @@ Streaming can then begin on "ipu1_csi0 capture" node. The v4l2-ctl
tool can be used to select any supported YUV or RGB pixelformat on the
capture device node.
+In order to determine what is the /dev/video node correspondent to "ipu1_csi0":
+
+.. code-block:: none
+
+ # dmesg | grep ipu1_csi0 | grep Registered
+ ipu1_csi0: Registered ipu1_csi0 capture as /dev/video0
+
+/dev/video0 is the streaming element in this case.
+
+Starting the streaming via v4l2-ctl:
+
+.. code-block:: none
+
+ v4l2-ctl --stream-mmap -d /dev/video0
+
+Starting the streaming via Gstreamer and sending the content to the display:
+
+.. code-block:: none
+
+ gst-launch-1.0 v4l2src device=/dev/video0 ! kmssink
Known Issues
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