From: Liam Girdwood <liam.r.girdwood@linux.intel.com>
To: "Lin, Mengdong" <mengdong.lin@intel.com>
Cc: "Jie, Yang" <yang.jie@intel.com>, Takashi Iwai <tiwai@suse.de>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
"Luis R. Rodriguez" <mcgrof@suse.com>,
"joonas.lahtinen@linux.intel.com"
<joonas.lahtinen@linux.intel.com>, Tom Gundersen <teg@jklm.no>,
Ming Lei <ming.lei@canonical.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kay Sievers <kay@vrfy.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
David Woodhouse <dwmw2@infradead.org>,
Luis Rodriguez <mcgrof@do-not-panic.com>,
lkml <linux-kernel@vger.kernel.org>,
yalin wang <yalin.wang2010@gmail.com>
Subject: Re: Problems loading firmware using built-in drivers with kernels that use initramfs.
Date: Thu, 27 Aug 2015 08:09:17 +0100 [thread overview]
Message-ID: <1440659357.2502.2.camel@loki> (raw)
In-Reply-To: <F46914AEC2663F4A9BB62374E5EEF8F8480DD236@SHSMSX101.ccr.corp.intel.com>
On Thu, 2015-08-27 at 01:50 +0000, Lin, Mengdong wrote:
> > -----Original Message-----
> > From: Liam Girdwood [mailto:liam.r.girdwood@linux.intel.com]
> > Sent: Wednesday, August 26, 2015 5:01 PM
> > To: Jie, Yang
> > Cc: Takashi Iwai; Dmitry Torokhov; Luis R. Rodriguez;
> > joonas.lahtinen@linux.intel.com; Tom Gundersen; Ming Lei; Al Viro; Greg
> > Kroah-Hartman; Kay Sievers; Linus Torvalds; David Woodhouse; Luis Rodriguez;
> > lkml; yalin wang; Lin, Mengdong
> > Subject: Re: Problems loading firmware using built-in drivers with kernels that
> > use initramfs.
> >
> > On Wed, 2015-08-26 at 08:29 +0000, Jie, Yang wrote:
> > > > -----Original Message-----
> > > > From: Liam Girdwood [mailto:liam.r.girdwood@linux.intel.com]
> >
> > > > I think the options are to either :-
> > > >
> > > > 1) Don not support audio DSP drivers using topology data as built-in
> > drivers.
> > > > Audio is not really a critical system required for booting anyway.
> > > >
> > > > 2) Create a default PCM for every driver that has topology data on
> > > > the assumption that every sound card will at least 1 PCM. This PCM
> > > > can then be re-configured when the FW is loaded.
> > >
> > > Yep, this case is quite similar with what Linus described.
> > >
> > > Is it possible that we can probe pcm device after firmware is loaded
> > > for this case?
> > >
> >
> > The PCM devices are defined in the topology data so it is only possible to
> > create the PCM device *after* the firmware is loaded in these drivers.
> >
> > Liam
>
> It seems this can prevent audio device driver in built-in mode to use topology drivers.
>
> If topology is present, the vendor driver also uses request_firmware() to load the topology data file in the probe phase. Then ASoC core will create the sound card and its PCM devices.
>
> Shall we force the device drivers that depends on topology to be configured as modules?
Yes, this is probably the best/quickest solution for the short term
until we can implement and test option 2.
Liam
next prev parent reply other threads:[~2015-08-27 7:09 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1440449403.2469.35.camel@loki>
[not found] ` <1440489900.2419.4.camel@loki>
[not found] ` <rbhuamrc6ajy3l1qereb60l8.1440494220682@email.android.com>
2015-08-25 19:34 ` Problems loading firmware using built-in drivers with kernels that use initramfs Luis R. Rodriguez
2015-08-25 19:46 ` Takashi Iwai
2015-08-25 19:58 ` Dmitry Torokhov
2015-08-25 20:26 ` Linus Torvalds
2015-08-26 5:30 ` yalin wang
2015-08-26 5:12 ` Jie, Yang
2015-08-26 5:32 ` Takashi Iwai
2015-08-26 6:17 ` Jie, Yang
2015-08-26 8:06 ` Liam Girdwood
2015-08-26 8:29 ` Jie, Yang
2015-08-26 9:00 ` Liam Girdwood
2015-08-27 1:50 ` Lin, Mengdong
2015-08-27 7:09 ` Liam Girdwood [this message]
2015-08-26 18:07 ` Linus Torvalds
2015-08-27 0:55 ` Ming Lei
2015-08-29 1:11 ` Luis R. Rodriguez
2015-08-29 4:09 ` Ming Lei
2015-08-29 7:11 ` Takashi Iwai
2015-08-29 8:50 ` Arend van Spriel
2015-08-29 10:38 ` Ming Lei
2015-08-30 8:25 ` Arend van Spriel
2015-08-30 18:11 ` Linus Torvalds
2015-12-17 19:24 ` Luis R. Rodriguez
2015-08-31 14:21 ` Ming Lei
2015-09-02 1:19 ` Luis R. Rodriguez
2015-09-02 12:09 ` Arend van Spriel
2015-09-02 12:13 ` Arend van Spriel
2015-09-02 18:58 ` Luis R. Rodriguez
2015-09-02 21:03 ` Arend van Spriel
2015-09-02 23:13 ` Dmitry Torokhov
2015-09-02 23:22 ` Luis R. Rodriguez
2015-09-02 23:29 ` Dmitry Torokhov
2015-09-02 23:46 ` Luis R. Rodriguez
2015-09-03 17:23 ` Arend van Spriel
2015-09-03 17:33 ` Dmitry Torokhov
2015-10-16 19:35 ` Luis R. Rodriguez
2015-10-16 21:05 ` Luis R. Rodriguez
2015-10-17 8:31 ` Arend van Spriel
2015-09-02 20:43 ` Dmitry Torokhov
2015-09-02 0:39 ` Luis R. Rodriguez
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