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Commit a778927e authored by Hemant Kumar's avatar Hemant Kumar
Browse files

usb: gadget: Enable L1 suspend by default 



Currently L1 suspend is disabled. Superspeed capable
device needs to support L1 suspend in HS/FS/LS mode.
Also, add module parameter to disable L1 suspend in
High speed mode.

Change-Id: Ie8e7f3949d276325305799640f2775343bd6b9da
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent 4e2a8a0f

drivers/usb/gadget/composite.c

+7 −7
Original line number Diff line number Diff line
@@ -35,9 +35,10 @@ 
	(speed == USB_SPEED_SUPER ?\

	SSUSB_GADGET_VBUS_DRAW : CONFIG_USB_GADGET_VBUS_DRAW)



static bool enable_l1_for_hs;

module_param(enable_l1_for_hs, bool, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(enable_l1_for_hs, "Enable support for L1 LPM for HS devices");

static bool disable_l1_for_hs;

module_param(disable_l1_for_hs, bool, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(disable_l1_for_hs,

	"Disable support for L1 LPM for HS devices");



/**

 * struct usb_os_string - represents OS String to be reported by a gadget
@@ -1637,13 +1638,12 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) 
				if (gadget->speed >= USB_SPEED_SUPER) {

					cdev->desc.bcdUSB = cpu_to_le16(0x0310);

					cdev->desc.bMaxPacketSize0 = 9;

				} else if (gadget->l1_supported ||

						enable_l1_for_hs) {

				} else if (!disable_l1_for_hs) {

					cdev->desc.bcdUSB = cpu_to_le16(0x0210);

					DBG(cdev,

					"Config HS device with LPM(L1)\n");

				}

			} else if (gadget->l1_supported) {

			} else if (!disable_l1_for_hs) {

				cdev->desc.bcdUSB = cpu_to_le16(0x0210);

				DBG(cdev, "Config HS device with LPM(L1)\n");

			}
@@ -1678,7 +1678,7 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) 
		case USB_DT_BOS:

			if ((gadget_is_superspeed(gadget) &&

				(gadget->speed >= USB_SPEED_SUPER))

				 || gadget->l1_supported) {

				 || !disable_l1_for_hs) {

				value = bos_desc(cdev);

				value = min(w_length, (u16) value);

			}

include/linux/usb/gadget.h

+0 −1
Original line number Diff line number Diff line
@@ -752,7 +752,6 @@ struct usb_gadget { 
	unsigned			is_selfpowered:1;

	unsigned			deactivated:1;

	unsigned			connected:1;

	bool				l1_supported;

	bool                            remote_wakeup;

};

#define work_to_gadget(w)	(container_of((w), struct usb_gadget, work))