On Fri, Jun 30, 2023 at 04:45:05PM +0300, Sakari Ailus wrote: > From: Wentong Wu <wentong.wu@xxxxxxxxx> > > Previously on ACPI platforms, sensors that are intended to be connected > to a IPU device for use with the ipu3-cio2 driver lacking the necessary > connection information in firmware. IPU bridge driver is to connect > sensors to IPU device via software nodes. > > Currently IVSC located between IPU device and sensors is available in > existing commercial platforms from multiple OEMs. But the connection > information between them in firmware is also not enough to build V4L2 > connection graph. This patch parses the connection properties from the > SSDB buffer in DSDT and build the connection using software nodes. > > IVSC driver is based on MEI framework (previously known as HECI), it > has two MEI clients, MEI CSI and MEI ACE. Both clients are used to > communicate messages with IVSC firmware. Linux abstracts MEI client > as a device, whose bus type is MEI. And the device is addressed by a > GUID/UUID which is part of the device name of MEI client. After figured > out MEI CSI via the UUID composed device name, this patch setup the > connection between MEI CSI and IPU, and the connection between MEI CSI > and sensor via software nodes. > > Signed-off-by: Wentong Wu <wentong.wu@xxxxxxxxx> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > [Sakari Ailus: rebase on Hans de Goede's cleanups and fixes] I believe we use past tense in these comment lines... > Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> -- With Best Regards, Andy Shevchenko
