| Message ID | 20201123090114.12641-4-amelie.delaunay@st.com |
|---|---|
| State | New |
| Headers | show |
| Series | STM32MP15 OTG params updates | expand |
On 11/23/2020 1:01 PM, Amelie Delaunay wrote: > Link Power Management (LPM) on STM32MP15 OTG HS encounters instabilities > with some Host controllers. OTG core fails to exit L1 state in 200us: > "dwc2 49000000.usb-otg: Failed to exit L1 sleep state in 200us." > Then the device is still not enumerated. > > To avoid this issue, disable Link Power Management on STM32MP15 HS OTG. > > Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> > --- > drivers/usb/dwc2/params.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c > index 9e5dd7f3f2f6..92df3d620f7d 100644 > --- a/drivers/usb/dwc2/params.c > +++ b/drivers/usb/dwc2/params.c > @@ -194,6 +194,10 @@ static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg) > p->host_perio_tx_fifo_size = 256; > p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; > p->power_down = DWC2_POWER_DOWN_PARAM_NONE; > + p->lpm = false; > + p->lpm_clock_gating = false; > + p->besl = false; > + p->hird_threshold_en = false; > } > > const struct of_device_id dwc2_of_match_table[] = { >
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index 9e5dd7f3f2f6..92df3d620f7d 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -194,6 +194,10 @@ static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg) p->host_perio_tx_fifo_size = 256; p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; p->power_down = DWC2_POWER_DOWN_PARAM_NONE; + p->lpm = false; + p->lpm_clock_gating = false; + p->besl = false; + p->hird_threshold_en = false; } const struct of_device_id dwc2_of_match_table[] = {
Link Power Management (LPM) on STM32MP15 OTG HS encounters instabilities with some Host controllers. OTG core fails to exit L1 state in 200us: "dwc2 49000000.usb-otg: Failed to exit L1 sleep state in 200us." Then the device is still not enumerated. To avoid this issue, disable Link Power Management on STM32MP15 HS OTG. Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> --- drivers/usb/dwc2/params.c | 4 ++++ 1 file changed, 4 insertions(+)