Configuring CSI to generate test pattern for i.MX6

isaacnickaein — Sun, 07 Jun 2015 13:40:31 GMT

Hi,

I am trying to setup CSI to generate test image (the checkboard pattern) and capture it using Gstreamer.

I am using Kernel 3.10.17 on i.MX6DL. The reference document I am using is Freescale's "i.MX 6 BSP Porting Guide" section "7.1.3 Configuring the CSI Unit in Test Mode".

What I have done so far in kernel (mostly based on the reference document):

1. Enabled CSI related modules in kernel menuconfig under Device Drivers > Multimedia > V4L2

2. Modified ov5640.c driver to remove codes related to I2C and regulators

3. Modified ov5640.c to set the sensor format from YUYV to RGB565 (ov5640_data.pix.pixelformat = V4L2_PIX_FMT_RGB565)

4. Modified ipu_capture.c to setup CSI in CST_TEST mode. The diff is attached.

5. Changed all IPU_PIX_FMT_UYVY to IPU_PIX_FMT_RGB565 in ipu_bg_overlay_sdc.c (didn't have any effect though)

6. Changed "CSI IC MEM" to "CSI MEM" in struct mxc_capture_inputs inside mxc_v4l2_capture.c

After these modifications, I can capture the checkboard pattern using GStreamer:

gst-launch mfw_v4lsrc num-buffers=1 ! jpegenc ! filesink location=sample.jpg

The color format of captured images is not correct. I have attached some samples for different RGB value settings.

Is there anything I am missing in the settings that causes this issue?

RGB=(0,0,0)	RGB=(255,0,0)	RGB=(0,255,0)	RGB=(0,0,255)	RGB=(255,255,255)

Original Attachment has been moved to: ipu_capture.c.diff.zip

Re: Configuring CSI to generate test pattern for i.MX6

weidong_sun — Tue, 09 Jun 2015 02:22:30 GMT

Hi Issac,

For RGB565 data, you should capture it by GENERIC mode .

please refter to this link !

https://community.freescale.com/docs/DOC-97981

Regards,

weidong

topic Configuring CSI to generate test pattern for i.MX6 in i.MX Processors

Configuring CSI to generate test pattern for i.MX6

Re: Configuring CSI to generate test pattern for i.MX6