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FROMGIT: usb: dwc2: disable Link Power Management on STM32MP15 HS OTG

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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.

Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20210105094855.30763-4-amelie.delaunay@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 53febc9569
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I3fabc7ac3fc555d9e526a1ecda6dab3a20206162
This commit is contained in:
Amelie Delaunay
2021-01-05 10:48:55 +01:00
committed by Greg Kroah-Hartman
parent d19c6bfe52
commit 7c3a4e6024
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/dwc2/params.c
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@@ -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[] = {