diff options
| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2021-04-13 19:13:18 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-14 15:58:33 +0200 |
| commit | 475e8be53d0496f9bc6159f4abb3ff5f9b90e8de (patch) | |
| tree | da5f592cf5221d96d351f5f12e907d1c22b8bb9a | |
| parent | 568262bf5492a9bb2fcc4c204b8d38fd6be64e28 (diff) | |
usb: dwc3: gadget: Check for disabled LPM quirk
If the device doesn't support LPM, make sure to disable the LPM
capability and don't advertise to the host that it supports it.
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/9e68527ff932b1646f92a7593d4092a903754666.1618366071.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc3/core.c | 2 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.h | 4 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 9 |
3 files changed, 13 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 2022d90443c8..5c25e6a72dbd 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1286,6 +1286,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) "snps,usb3_lpm_capable"); dwc->usb2_lpm_disable = device_property_read_bool(dev, "snps,usb2-lpm-disable"); + dwc->usb2_gadget_lpm_disable = device_property_read_bool(dev, + "snps,usb2-gadget-lpm-disable"); device_property_read_u8(dev, "snps,rx-thr-num-pkt-prd", &rx_thr_num_pkt_prd); device_property_read_u8(dev, "snps,rx-max-burst-prd", diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 5a9b56b744c5..695ff2d791e4 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1036,7 +1036,8 @@ struct dwc3_scratchpad_array { * @dis_start_transfer_quirk: set if start_transfer failure SW workaround is * not needed for DWC_usb31 version 1.70a-ea06 and below * @usb3_lpm_capable: set if hadrware supports Link Power Management - * @usb2_lpm_disable: set to disable usb2 lpm + * @usb2_lpm_disable: set to disable usb2 lpm for host + * @usb2_gadget_lpm_disable: set to disable usb2 lpm for gadget * @disable_scramble_quirk: set if we enable the disable scramble quirk * @u2exit_lfps_quirk: set if we enable u2exit lfps quirk * @u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk @@ -1242,6 +1243,7 @@ struct dwc3 { unsigned dis_start_transfer_quirk:1; unsigned usb3_lpm_capable:1; unsigned usb2_lpm_disable:1; + unsigned usb2_gadget_lpm_disable:1; unsigned disable_scramble_quirk:1; unsigned u2exit_lfps_quirk:1; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index ec7aabba962d..6227641f2d31 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3495,6 +3495,7 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) /* Enable USB2 LPM Capability */ if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A) && + !dwc->usb2_gadget_lpm_disable && (speed != DWC3_DSTS_SUPERSPEED) && (speed != DWC3_DSTS_SUPERSPEED_PLUS)) { reg = dwc3_readl(dwc->regs, DWC3_DCFG); @@ -3521,6 +3522,12 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) dwc3_gadget_dctl_write_safe(dwc, reg); } else { + if (dwc->usb2_gadget_lpm_disable) { + reg = dwc3_readl(dwc->regs, DWC3_DCFG); + reg &= ~DWC3_DCFG_LPM_CAP; + dwc3_writel(dwc->regs, DWC3_DCFG, reg); + } + reg = dwc3_readl(dwc->regs, DWC3_DCTL); reg &= ~DWC3_DCTL_HIRD_THRES_MASK; dwc3_gadget_dctl_write_safe(dwc, reg); @@ -3969,7 +3976,7 @@ int dwc3_gadget_init(struct dwc3 *dwc) dwc->gadget->ssp_rate = USB_SSP_GEN_UNKNOWN; dwc->gadget->sg_supported = true; dwc->gadget->name = "dwc3-gadget"; - dwc->gadget->lpm_capable = true; + dwc->gadget->lpm_capable = !dwc->usb2_gadget_lpm_disable; /* * FIXME We might be setting max_speed to <SUPER, however versions |