TW9910 Video Capture

andrekilian — Wed, 14 Mar 2018 12:54:49 GMT

Hi,

I am trying to capture a Video from a TW9910 on our IMX6Q (We run Android 5.0.2 with 3.10.53 Kernel)

Analog Camera ---->TW9910 -----BT656----> imx6q CSI0

I took the ADV7180 driver from "/drivers/media/platform/mxc/capture/adv7180" and removed all the I2C communication related to ADV7180.Then I used the following code to initialize the TW9910 for ITU-R BT.656 (according to the datasheet):

i2c_smbus_write_byte_data(priv->client,0x02, 0x40);
i2c_smbus_write_byte_data(priv->client,0x03, 0xA6);

//######## BT.656 (Datasheet)

    i2c_smbus_write_byte_data(priv->client,VDELAY_LO,    0x012); //VDELAY_LO
   i2c_smbus_write_byte_data(priv->client,VACTIVE_LO,    0x0F4); //VACTIVE_LO
   i2c_smbus_write_byte_data(priv->client,HACTIVE_LO,    0x2D0); //HACTIVE_LO

   i2c_smbus_write_byte_data(priv->client,VBICNTL,    0x58); //HA_EN 1
    i2c_smbus_write_byte_data(priv->client,DID,        0x20); //VIPCFG 1
   i2c_smbus_write_byte_data(priv->client,VVBI,        0x10); //NTSC656 1

To test it I tried to capture a Video with

cat /dev/video0 > /sdcard/test1.mpeg

however the IPU seems to lose the incoming frames:

imx-ipuv3 2400000.ipu: IPU Warning - IPU_INT_STAT_10 = 0x00000001
imx-ipuv3 2400000.ipu: IPU Warning - IPU_INT_STAT_10 = 0x00000001

imx-ipuv3 2400000.ipu: IPU Warning - IPU_INT_STAT_10 = 0x00000001
.

Capturing with ffmpeg:

ffmpeg-2.2.git -f v4l2 -framerate 30 -video_size 640x480 -pix_fmt uyvy422 -i /dev/video0 /sdcard/output.mkv

I also tried to use gstreamer-imx from GitHub - Freescale/gstreamer-imx: GStreamer 1.0 plugins for i.MX platforms

but was unable to install it.

What could be the problem with the IPU losing Frames? Do I need another configuration for TW9910, or other tools to test it?

Re: TW9910 Video Capture

igorpadykov — Wed, 14 Mar 2018 23:17:10 GMT

Hi Andre

please check

Switching CSI into Progressive bt.656 Mode

Best regards
igor
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topic Re: TW9910 Video Capture in i.MX Processors

TW9910 Video Capture

Re: TW9910 Video Capture