ath10k.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Rob Herring <robh@kernel.org>
Cc: Amit Pundir <amit.pundir@linaro.org>,
	devicetree@vger.kernel.org, lkml <linux-kernel@vger.kernel.org>,
	Jeffrey Hugo <jeffrey.l.hugo@gmail.com>,
	netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
	Konrad Dybcio <konradybcio@gmail.com>,
	ath10k@lists.infradead.org,
	Sumit Semwal <sumit.semwal@linaro.org>,
	John Stultz <john.stultz@linaro.org>,
	Jakub Kicinski <kuba@kernel.org>,
	David S Miller <davem@davemloft.net>,
	Kalle Valo <kvalo@codeaurora.org>
Subject: Re: [PATCH] ath10k: Introduce a devicetree quirk to skip host cap QMI requests
Date: Thu, 29 Oct 2020 08:40:17 -0500	[thread overview]
Message-ID: <20201029134017.GA807@yoga> (raw)
In-Reply-To: <20200929190817.GA968845@bogus>

On Tue 29 Sep 14:08 CDT 2020, Rob Herring wrote:

> On Fri, Sep 25, 2020 at 11:59:41PM +0530, Amit Pundir wrote:
> > There are firmware versions which do not support host capability
> > QMI request. We suspect either the host cap is not implemented or
> > there may be firmware specific issues, but apparently there seem
> > to be a generation of firmware that has this particular behavior.
> > 
> > For example, firmware build on Xiaomi Poco F1 (sdm845) phone:
> > "QC_IMAGE_VERSION_STRING=WLAN.HL.2.0.c3-00257-QCAHLSWMTPLZ-1"
> > 
> > If we do not skip the host cap QMI request on Poco F1, then we
> > get a QMI_ERR_MALFORMED_MSG_V01 error message in the
> > ath10k_qmi_host_cap_send_sync(). But this error message is not
> > fatal to the firmware nor to the ath10k driver and we can still
> > bring up the WiFi services successfully if we just ignore it.
> > 
> > Hence introducing this DeviceTree quirk to skip host capability
> > QMI request for the firmware versions which do not support this
> > feature.
> 
> So if you change the WiFi firmware, you may force a DT change too. Those 
> are pretty independent things otherwise.
> 

Yes and that's not good. But I looked at somehow derive this from
firmware version numbers etc and it's not working out, so I'm out of
ideas for alternatives.

> Why can't you just always ignore this error? If you can't deal with this 
> entirely in the driver, then it should be part of the WiFi firmware so 
> it's always in sync.
> 

Unfortunately the firmware versions I've hit this problem on has gone
belly up when receiving this request, that's why I asked Amit to add a
flag to skip it.

That said, in the devices I've hit this I've managed to get newer
firmware working, which doesn't have either problem.

Regards,
Bjorn

_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

  parent reply	other threads:[~2020-10-29 13:40 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-25 18:29 Amit Pundir
2020-09-26  0:00 ` Bjorn Andersson
2020-09-29 19:08 ` Rob Herring
2020-09-30 11:09   ` Amit Pundir
2020-10-29 13:40   ` Bjorn Andersson [this message]
2020-11-03  7:48     ` Amit Pundir
2020-11-24 17:51       ` Bjorn Andersson
2020-12-07 16:55         ` Kalle Valo
2021-02-02 11:11           ` Amit Pundir
2021-02-08 17:21             ` Kalle Valo
2021-02-08 17:48               ` Bjorn Andersson
2021-02-09  8:10                 ` Kalle Valo
2021-05-20 11:47                   ` Amit Pundir

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=20201029134017.GA807@yoga \
    --to=bjorn.andersson@linaro.org \
    --cc=amit.pundir@linaro.org \
    --cc=ath10k@lists.infradead.org \
    --cc=davem@davemloft.net \
    --cc=devicetree@vger.kernel.org \
    --cc=jeffrey.l.hugo@gmail.com \
    --cc=john.stultz@linaro.org \
    --cc=konradybcio@gmail.com \
    --cc=kuba@kernel.org \
    --cc=kvalo@codeaurora.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-wireless@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=robh@kernel.org \
    --cc=sumit.semwal@linaro.org \
    --subject='Re: [PATCH] ath10k: Introduce a devicetree quirk to skip host cap QMI requests' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).