Commit 4824a573 authored Jul 06, 2018 by Chandana Kishori Chiluveru

usb: f_gsi: Disable function remote wake-up capability for DPL

If driver allows function remote wake-up for DPL interface.
windows10/8 host may suspend the DPL function in SS mode.
When we receive Function Suspend for usb interface. gsi_suspend()
blocks ringing of doorbell by USB controller to IPA GSI and schedule
usb_ipa_w work with event EVNT_SUSPE. This will block the GSI to IPA
path for other GSI interfaces in the compositions.

Hence disable function remote wake-up capability for DPL interface.

Change-Id: Ic2da104a48bc14aa2f2912544a9b5fa1c5de8596
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>

parent d77ce925

drivers/usb/gadget/function/f_gsi.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2538,6 +2538,11 @@ static void gsi_resume(struct usb_function *f)
		static int gsi_get_status(struct usb_function *f)
		{
		unsigned int remote_wakeup_en_status = f->func_wakeup_allowed ? 1 : 0;
		struct f_gsi *gsi = func_to_gsi(f);

		/* Disable function remote wake-up for DPL interface */
		if (gsi->prot_id == USB_PROT_DIAG_IPA)
		return 0;

		return (remote_wakeup_en_status << FUNC_WAKEUP_ENABLE_SHIFT) \|
		(1 << FUNC_WAKEUP_CAPABLE_SHIFT);