From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: [PATCH v6 1/3] ALSA: hdac_ext: add extended HDA bus
Date: Mon, 08 Jun 2015 17:40:46 +0200
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To: Vinod Koul <vinod.koul@intel.com>
Cc: liam.r.girdwood@linux.intel.com, patches.audio@intel.com, alsa-devel@alsa-project.org, broonie@kernel.org, Jeeja KP <jeeja.kp@intel.com>
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At Mon, 8 Jun 2015 21:00:14 +0530,
Vinod Koul wrote:
> 
> On Mon, Jun 08, 2015 at 03:38:22PM +0530, Vinod Koul wrote:
> > > > +#define snd_hdac_ext_bus_ppcap_updateb(dev, reg, mask, val) \
> > > > +	snd_hdac_ext_bus_ppcap_writeb(dev, reg, \
> > > > +			       (snd_hdac_ext_bus_ppcap_readb(dev, reg) & \
> > > > +				~(mask)) | (val))
> > > 
> > > It's not necessarily good to wrap all with such macros.
> > > For azx_write*(), I kept them as is for reducing the amount of useless
> > > code rewrites.  But for new codes, I don't think it's always worth...
> > Actually while updating the patch for ext I was wondering about this too.
> > 
> > So we cna remove these and use snd_hdac_chip_writel/w/b here
> As Jeeja pointed we can't use snd_hdac_chip_writel as we need to use a
> different base. So we cna move this to use plain writel only
> 
> Any other ideas?

I don't think you need to access via io_ops redirection as these are
SKL specific registers.  Use plain readl()/writel() and keep things
as simple as possible.

(And better to avoid w and b variants.)


Takashi