I am controlling spi slave device with my spi-tool which uses linux,spidev in kernel. It is working fine.
I want to connect this slave device to CSI camera port. Basically i have to create a sub dev driver. Somehow i faked with v4l2_i2c_subdev registration and added slave under i2c node, so probe succeded. I am focusing on video part, control part is from spi-tool. I am testing with yavta. DQBUF is not receiving any buffers. Let me know the possible ways to debug the issue. I probed CSI lanes, I could see data traffic. Clock everything is fine.
what could be the reason for not receiving buffers?
@todortomov, @Loic any ideas?
I am sorry, i am working on mediatek platform now. I know this forum is for db820c.