Hi Bingbu, On 10/24/23 13:29, bingbu.cao@xxxxxxxxx wrote: > From: Bingbu Cao <bingbu.cao@xxxxxxxxx> > > This patch series adds a driver for Intel IPU6 input system. > IPU6 is the sixth generation of Imaging Processing Unit, it is a PCI > device which can be found in some Intel Client Platforms. User can use > IPU6 to capture images from MIPI camera sensors. > > IPU6 has its own firmware which exposes ABIs to driver, and communicates > with CSE to do firmware authentication. IPU6 has its MMU hardware, so > the driver sets up a page table to allow IPU6 DMA to access the system > memory. > > IPU6 input system driver uses MC and V4L2 sub-device APIs besides V4L2. I have been testing this on a TigerLake system, a Dell Latitude 9420 with ov01a1s and the packed 10 bit bayer pixel fmt: V4L2_PIX_FMT_SGRBG10P, which libcamera together with (WIP) software debayer support picks by default does not work. There are many many CSI errors in dmesg and only the first 10 or so lines of the image show. Disabling the packed format by removing it from ipu6_isys_pfmts[], making libcamera pick the unpacked (every 10 bits per pixel data stored in a 16 bit word in output buffer) fixes this. Are the packed bayer formats supposed to work on Tiger Lake, or is this a known issue which Intel's own userspace stack avoids by always picking the unpacked format ? Regards, Hans
