[PATCH v2 2/2] usb: dwc2: fix multiplier handling in endpoint setup
s.hauer at pengutronix.de
Wed Feb 1 23:21:23 PST 2023
On Wed, Feb 01, 2023 at 07:13:24PM +0100, Ahmad Fatoum wrote:
> On 24.01.23 21:01, Michael Grzeschik wrote:
> > If the multiplier is 0 in the descriptor bitfield the multiplier count
> > is one. For calculating the multiplier count the extra function
> > usb_endpoint_maxp_mult should be used. Rework the dwc2 driver to use it
> > and make multi packages work.
> > While at it, we also remove the USB_EP_MAXP_MULT and
> > USB_ENDPOINT_MAXP_MASK macros that would stay left unused and are
> > defined in include/usb/ch9.ch anyway.
> > Tested-by: Jules Maselbas <jmaselbas at kalray.eu>
> > Signed-off-by: Michael Grzeschik <m.grzeschik at pengutronix.de>
> This induces the same breakage as in v1, even a simple ACM gadget
> barebox at Linux Automation Test Automation Controller (TAC):/ usbgadget -a
> udc0: registering UDC driver [g_multi]
> multi_bind: creating ACM function
> g_multi usbgadget: Multifunction Composite Gadget
> g_multi usbgadget: g_multi ready
> dwc2 49000000.usb-otg at 49000000.of: bound driver g_multi
> dwc2 49000000.usb-otg at 49000000.of: new address 3
> g_multi usbgadget: high-speed config #1: Multifunction Composite Gadget
> ERROR: dwc2 49000000.usb-otg at 49000000.of: dwc2_ep_enable: No suitable fifo found
> The other patch while maybe applicable to the kernel, doesn't do anything
> for barebox. Please test barebox patches in barebox for v3.
> @Sascha, can you drop this series from next?
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