[alsa-devel] Unsupported Valley View 'LPE' adapter?

[bobby]

Liam Girdwood <liam.r.girdwood <at> linux.intel.com> writes:

> 
> On Tue, 2014-02-18 at 20:59 -0800, Adam Williamson wrote:
> > On Mon, 2014-02-17 at 16:48 -0800, Adam Williamson wrote:
> > > On Mon, 2014-02-17 at 16:40 -0800, Adam Williamson wrote:
> > > > On Mon, 2014-02-17 at 09:54 +0000, bobby wrote:
> > > > > 
> > > > > This is a pci device for which the driver is not yet available.
> > > > > I went through the intel atom processor manual and found that it 
has 3 I2S 
> > > > > ports, has its 
> > > > > own DMA. The Soc is interfaced with LPE audio core via internal 
PCI bus. 
> > > > > Did you guys hear anything from intel about the driver support. 
Any inputs 
> > > > > would be of great help please
> > > > 
> > > > Jan Michael Brummer at Intel pointed this out to me recently:
> > > > 
> > > > 
https://kernel.googlesource.com/pub/scm/linux/kernel/git/lrg/asoc/+/intel/h
aswell-audio-dsp%5E
> > > > 
> > > > looks like it's being worked on.
> > > 
> > > Heh, that's actually just a mirror of the git ASoC branch. All those
> > > patches went through this very list last week. I don't know precisely
> > > how the upstreaming process goes for this stuff, but I'm guessing 
it'll
> > > wind up in 3.14 or 3.15.
> > > 
> > > (I may try building the patches into my Fedlet kernel builds and see 
if
> > > that gets anywhere...)
> > 
> > FWIW, I tried building a 3.14rc3 kernel with these patches applied and
> > the drivers enabled as modules. On boot on a Dell Venue 8 Pro, all the
> > relevant modules are loaded, but there's no ALSA device, and no
> > obviously useful errors in any logs, or useful output from alsa-
info.sh.
> > Is it expected that the driver doesn't actually work yet? Per the 
recent
> > commits, do I need some kind of firmware? Any debugging that would be
> > useful?
> 
> Sorry, we're not finished with the upstreaming yet. The current patches
> upstream are for the low level parts of the Intel DSP drivers. Jarkko
> and I still have to upstream the upper layers of the drivers (probably
> today) and you will also need firmware.
> 
> Once upstream the drivers will support Valley View, Baytrail, Haswell
> and Broadwell. The firmware for Baytrail and Valleyview will be
> available shortly too.
> 
> Liam 
> 
> 

Thanks Liam and Jarkko saw your patches related to the Intel SST Audio 
Platform drivers, I hope the upstreaming process is complete for this 
module. Please let us know when the firmware is available.

I have few question here, the i2s mode should be enabled in the platform 
drivers right. 

In the Bayley Bay bios I saw that the LPE audio could be enumerated via 
PCI or ACPI, the patches I saw mostly cover the ACPI mode. Will the PCI 
mode be covered in the patches.

Thanks in Advance
Bobby