| Message ID | f86b17f0e801e758586f445f2e0a10b97c507454.1566263914.git.thinhn@synopsys.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 54fb5ba647f8f942e372dee45025bce4adc08c38 |
| Headers | show |
| Series | usb: gadget: Report recommended BESL | expand |
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index afc2ddb080ae..8ac024c5147a 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2078,6 +2078,16 @@ static void dwc3_gadget_config_params(struct usb_gadget *g, { struct dwc3 *dwc = gadget_to_dwc(g); + params->besl_baseline = USB_DEFAULT_BESL_UNSPECIFIED; + params->besl_deep = USB_DEFAULT_BESL_UNSPECIFIED; + + /* Recommended BESL */ + if (!dwc->dis_enblslpm_quirk) { + params->besl_baseline = 0; + if (dwc->is_utmi_l1_suspend) + params->besl_deep = min_t(u8, dwc->hird_threshold, 15); + } + /* U1 Device exit Latency */ if (dwc->dis_u1_entry_quirk) params->bU1devExitLat = 0;
When operating with LPM signals, the controller asserts the deep low-power signal (utmi_l1_suspend_n) to the phy when the BESL value of the LPM token is equal to or greater than DCTL.HIRD_Thres[3:0] (and with DCTL.HIRD_Thres[4] set). Otherwise, the shallow low-power signal (utmi_sleep_n) is asserted. Set the recommended deep BESL equal to the controller's DCTL.HIRD_Thres[3:0] setting, and set the baseline BESL to 0 for the shallow low-power signal. This maximizes the opportunity for L1 residency and optimizes power savings. Signed-off-by: Thinh Nguyen <thinhn@synopsys.com> --- drivers/usb/dwc3/gadget.c | 10 ++++++++++ 1 file changed, 10 insertions(+)