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media: imx.rst: Fix the MIPI CSI-2 virtual channel

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The current instructions for imx6q-sabresd do not lead to functional
capture on OV5640 MIPI CSI-2.

The reason for this, as explained by Steve Longerbeam, is that OV5640 by
default transmits on virtual channel 0, not channel 1 as is given in the
instructions.

Adapt the instructions to use virtual channel 0 so that a working
camera setup can be achieved on imx6q-sabresd.

Also, since we are using an IC direct conversion pipeline, improve
the example by demonstrating colorspace and scaling.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Steve Longerbeam<slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Fabio Estevam 2020-04-09 18:29:42 +02:00 committed by Mauro Carvalho Chehab
parent ff8c2784b0
commit 9429e7072f
1 changed files with 14 additions and 15 deletions
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29
Documentation/admin-guide/media/imx.rst
View File

@ -590,30 +590,29 @@ The OV5640 module connects to MIPI connector J5 (sorry I don't have the
compatible module part number or URL).
The following example configures a direct conversion pipeline to capture
from the OV5640, transmitting on MIPI CSI-2 virtual channel 1. $sensorfmt
can be any format supported by the OV5640. $sensordim is the frame
dimension part of $sensorfmt (minus the mbus pixel code). $outputfmt can
be any format supported by the ipu1_ic_prpenc entity at its output pad:
from the OV5640, transmitting on MIPI CSI-2 virtual channel 0. It also
shows colorspace conversion and scaling at IC output.
.. code-block:: none
# Setup links
media-ctl -l "'ov5640 1-003c':0 -> 'imx6-mipi-csi2':0[1]"
media-ctl -l "'imx6-mipi-csi2':2 -> 'ipu1_csi1':0[1]"
media-ctl -l "'ipu1_csi1':1 -> 'ipu1_ic_prp':0[1]"
media-ctl -l "'imx6-mipi-csi2':1 -> 'ipu1_csi0_mux':0[1]"
media-ctl -l "'ipu1_csi0_mux':2 -> 'ipu1_csi0':0[1]"
media-ctl -l "'ipu1_csi0':1 -> 'ipu1_ic_prp':0[1]"
media-ctl -l "'ipu1_ic_prp':1 -> 'ipu1_ic_prpenc':0[1]"
media-ctl -l "'ipu1_ic_prpenc':1 -> 'ipu1_ic_prpenc capture':0[1]"
# Configure pads
media-ctl -V "'ov5640 1-003c':0 [fmt:$sensorfmt field:none]"
media-ctl -V "'imx6-mipi-csi2':2 [fmt:$sensorfmt field:none]"
media-ctl -V "'ipu1_csi1':1 [fmt:AYUV32/$sensordim field:none]"
media-ctl -V "'ipu1_ic_prp':1 [fmt:AYUV32/$sensordim field:none]"
media-ctl -V "'ipu1_ic_prpenc':1 [fmt:$outputfmt field:none]"
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.
media-ctl -V "'ov5640 1-003c':0 [fmt:UYVY2X8/640x480]"
media-ctl -V "'imx6-mipi-csi2':1 [fmt:UYVY2X8/640x480]"
media-ctl -V "'ipu1_csi0_mux':2 [fmt:UYVY2X8/640x480]"
media-ctl -V "'ipu1_csi0':1 [fmt:AYUV32/640x480]"
media-ctl -V "'ipu1_ic_prp':1 [fmt:AYUV32/640x480]"
media-ctl -V "'ipu1_ic_prpenc':1 [fmt:ARGB8888_1X32/800x600]"
# Set a format at the capture interface
v4l2-ctl -d /dev/video1 --set-fmt-video=pixelformat=RGB3
Streaming can then begin on "ipu1_ic_prpenc capture" node.
Known Issues
------------