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@xxxxxx>
---
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[] = {
--
2.17.1
