V4L2_PIX_FMT_Y16 is not supported by DM3730-DVSDK4.02 isp.c

Long Xiao

Other Parts Discussed in Thread: DM3730

Hi,

I'm trying to connect a camera which outputs parallel 10bit gray image data to the DM3730 camera interface.

I programmed the linux driver of my camera by myself, and tried to set the pixel format to V4L2_PIX_FMT_Y16 in driver and linux applicaion,but failed.

I found that the format V4L2_PIX_FMT_Y16 is not supproted in DM3730 DVSDK4.02 spi.c.Thus,I tried to change the pixel format to V4L2_PIX_FMT_SGRB10 in both camera linux driver and applicaion program,and could get frame buffer in user space.

Now I need to change the image to 24bit RGB format to be displayed.My camera outputs 10 bit gray image data ,but I set the pixel format in both linux driver and linux application program as V4L2_PIX_FMT_SGRB10.

Thus,I'm not sure the image data gotten from user space(DM3730 outsputs image data from CCDC directly) in which kind of pixel format?Is the format still 10bit grey or it has been changed into another format due to choosing V4L2_PIX_FMT_SGRB10?

Thanks.

over 9 years ago

0 Cvetolin Shulev-XID over 9 years ago

TI__Guru 65405 points

Hi Long Xiao,

It hard to say what is the pixel date format without seeing your source changes but you can verify the data format by reading the CSI2_CTx_CTRL2 register value. You can find detailed description of the data formats depending on the CSI2_CTx_CTRL2 register value in the AM/DM37x Multimedia Device Technical Reference Manual Table 6-669 which can be found at:

http://www.ti.com/product/DM3730/technicaldocuments

Tsvetolin Shulev

0 Long Xiao over 9 years ago in reply to Cvetolin Shulev-XID

Prodigy 90 points

Hi,Tsvetolin

Thanks for your reply.

The interface of camera port I used is the parallel one(CPI),not the CSI.

So, is it necessary to read the value of CSI relevant register(CSI2_CTx_CTRL2) ?

Is there any register CPI relevant could reflect the data format information?

0 Cvetolin Shulev-XID over 9 years ago in reply to Long Xiao

TI__Guru 65405 points

Hi Long Xiao,

When using the Camera Parallel Interface CPI the registers described in the section 6.6.4 Camera ISP CCDC Registers are relevant for the CPI configuration. Also you can find description of the data formats relevant for the CPI in section 6.2.4 Camera ISP Protocols and Data Formats of the TRM.

Tsvetolin Shulev

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V4L2_PIX_FMT_Y16 is not supported by DM3730-DVSDK4.02 isp.c