[Intel-gfx] cerryview sd card problem

[Giacomo Comes]

On Mon, Sep 26, 2016 at 12:52:11PM +0300, Westerberg, Mika wrote:
> On Mon, Sep 26, 2016 at 11:57:04AM +0300, Jani Nikula wrote:
> > On Wed, 21 Sep 2016, Giacomo Comes <comes at naic.edu> wrote:
> > > Hi,
> > > I hope this is the appropriate place to ask what follows.
> > > If not please point me to the right place.
> > >
> > > I have a couple of cerryview systems
> > > (Acer Aspire R11 and Intel compute stick STK1AW32SC) on which
> > > I run linux (openSUSE 42.1) with a 4.7 kernel.
> > >
> > > I have a problem though with the sd card reader:
> > > in normal condition the kernel does not see the card reader.
> > > The modules pinctrl-cherryview.ko and sdhci-pci.ko are both 
> > > loaded but the sd device is missing.
> > >
> > > Following the suggestion found here:
> > > https://bugzilla.opensuse.org/show_bug.cgi?id=954532#c24
> > > I "fixed" the problem by adding the module pinctrl-cherryview
> > > in the initrd.
> > >
> > > I was wondering if the necessity to put pinctrl-cherryview in
> > > the initrd is due to a bug in the kernel driver or it is a distro
> > > issue.
> > 
> > Hi Giacomo, intel-gfx is about Intel *graphics*. We are mostly clueless
> > about SD cards here. ;)
> > 
> > Mika, Andy, could you point Giacomo to the right place please?
> 
> If the SD-card card detection is implemented as a GPIO, the GPIO/pinctrl
> driver needs to be there before the SD-card driver is able to detect a
> card being inserted.

Ok, then it is the distro that have to take care about that.
For the time being I'll manually force pinctrl-cherryview in the initrd.
However, while the Acer Aspire R11 sd card reader works, the
one in the compute stick STK1AW32SC doesn't.
Every time I insert a sd card I see this message in the journal:
  mmc1: error -84 whilst initialising SD card
Tested with kernel 4.8rc7.
Where can I get help about that?

Giacomo