On 19/01/2016 23:58, Bjorn Helgaas wrote:
[+cc Ashwini, Felipe]
On Sun, Jan 17, 2016 at 04:35:30PM +0100, Xavier Gnata wrote:
Hello,
The development of a driver for
02:00.0 Multimedia controller [0480]: Broadcom Corporation 720p
FaceTime HD Camera [14e4:1570]
has started. It is still in an early stage but it's progressing and
it already streams.
https://github.com/patjak/bcwc_pcie
However, as you can see, this webcam shares the exact same ID as
bdc_pci 0x1570 .
Could we use e.g. PCI_CLASS in bdc_pci to avoid grabbing the webcam
incorrectly?
The FaceTime HD Camera has PCI_CLASS 0x048000
I hope that bdc_pci has another PCI_CLASS.
Or maybe there is a better way to distinguish bdc_pci from FaceTime
HD Camera. What do you think?
This is what the PCI Vendor/Device IDs are for. It's a shame that
Broadcom apparently screwed up and used the same IDs in two different
devices.
At least, I *assume* they're different. I can't really tell what the
bdc_pci driver does, so it's conceivable that it's using the same
device in a different way than you are.
If they really are different devices, using the class code sounds like
a reasonable way to differentiate them.
Bjorn
bdc is "Broadcom's USB3.0 device controller IP" in the SOC world which
is connected through PCIe on FPGA-PCIe based platform.
Nothing to do with the Facetime HD webcam of a macbook air.
Broadcom screwed up.
The issue is that I don't have access to such a BDC.
I also don't find it in
http://pcidatabase.com/vendor_details.php?id=767
which lists 0x1570 as being the webcam.
Where can we find the PCI class of this "Broadcom's USB3.0 device
controller IP" ? Ashwini?
Xavier
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
