From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
To: Amelie Delaunay <amelie.delaunay@st.com>,
Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-stm32@st-md-mailman.stormreply.com"
<linux-stm32@st-md-mailman.stormreply.com>,
Fabrice Gasnier <fabrice.gasnier@st.com>
Subject: Re: [PATCH 3/3] usb: dwc2: disable Link Power Management on STM32MP15 HS OTG
Date: Mon, 30 Nov 2020 06:17:37 +0000 [thread overview]
Message-ID: <f068f069-232c-7bef-3f1c-7fce95a2a401@synopsys.com> (raw)
In-Reply-To: <20201123090114.12641-4-amelie.delaunay@st.com>
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[] = {
>
prev parent reply other threads:[~2020-11-30 6:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-23 9:01 [PATCH 0/3] STM32MP15 OTG params updates Amelie Delaunay
2020-11-23 9:01 ` [PATCH 1/3] usb: dwc2: set ahbcfg parameter for STM32MP15 OTG HS and FS Amelie Delaunay
2020-11-30 6:16 ` Minas Harutyunyan
2020-11-23 9:01 ` [PATCH 2/3] usb: dwc2: enable FS/LS PHY clock select on STM32MP15 FS OTG Amelie Delaunay
2020-11-30 6:17 ` Minas Harutyunyan
2020-11-23 9:01 ` [PATCH 3/3] usb: dwc2: disable Link Power Management on STM32MP15 HS OTG Amelie Delaunay
2020-11-30 6:17 ` Minas Harutyunyan [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f068f069-232c-7bef-3f1c-7fce95a2a401@synopsys.com \
--to=minas.harutyunyan@synopsys.com \
--cc=amelie.delaunay@st.com \
--cc=balbi@kernel.org \
--cc=fabrice.gasnier@st.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-stm32@st-md-mailman.stormreply.com \
--cc=linux-usb@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.