linux-kernel - Re: [PATCH 2/3] swarm_cs4297: Rename AC97 registers to use sound/ac97

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Date:	Tue, 19 Jun 2012 16:13:55 -0300
From:	Ezequiel Garcia <elezegarcia@...il.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	Ralf Baechle <ralf@...ux-mips.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Clemens Ladisch <clemens@...isch.de>
Subject: Re: [PATCH 2/3] swarm_cs4297: Rename AC97 registers to use
 sound/ac97_codec.h definitions

On Tue, Jun 19, 2012 at 9:47 AM, Takashi Iwai <tiwai@...e.de> wrote:
> At Tue, 19 Jun 2012 09:41:30 -0300,
> Ezequiel Garcia wrote:
>>
>> On Tue, Jun 19, 2012 at 2:38 AM, Takashi Iwai <tiwai@...e.de> wrote:
>> > At Mon, 18 Jun 2012 14:50:53 -0300,
>> > Ezequiel Garcia wrote:
>> >>
>> >> Hi Takashi,
>> >>
>> >> On Mon, Jun 18, 2012 at 11:04 AM, Takashi Iwai <tiwai@...e.de> wrote:
>> >> > At Mon, 11 Jun 2012 16:58:50 -0300,
>> >> > Ezequiel Garcia wrote:
>> >> >>
>> >> >> This patch removes the last usage of linux/ac97_codec.h
>> >> >> by renaming ac97 registers to use sound/ac97_codec.h definitions.
>> >> >> This will enable us to remove linux/ac97_codec.h.
>> >> >>
>> >> >> Not even compilation tested.
>> >> >>
>> >> >> Cc: Ralf Baechle <ralf@...ux-mips.org>
>> >> >> Cc: Jaroslav Kysela <perex@...ex.cz>
>> >> >> Cc: Takashi Iwai <tiwai@...e.de>
>> >> >> Cc: Clemens Ladisch <clemens@...isch.de>
>> >> >> Signed-off-by: Ezequiel Garcia <elezegarcia@...il.com>
>> >> >> ---
>> >> >> Hi all,
>> >> >>
>> >> >> This patch is important so we can remove linux/ac97_codec.h usage.
>> >> >> Since this driver is mips related, I can't test it until I install
>> >> >> a mips toolchain.
>> >> >> If someone can compile this for me, or even test it with real
>> >> >> hardware I think it would be better.
>> >> >> If not then I can install a mips toolchain and compile it myself,
>> >> >> but I won't be able to test it on real hardware.
>> >> >>
>> >> >> This patch should be treated with carefully and be applied only
>> >> >> if someone manages to test it.
>> >> >
>> >> > A slight concern by this change is that the driver includes
>> >> > sound/ac97_codec.h although it's based on OSS framework.
>> >> > sound/ac97_codec.h is the header for ALSA ac97 structs, and this can't
>> >> > be mixed up with OSS.
>> >> >
>> >> > If the intention is only about AC97 register definition, we may split
>> >> > ac97_codec.h into ac97_regs.h and ac97_codecs.h where the former
>> >> > contains only the register definitions (thus framework-neutral) and
>> >> > the latter includes the former.
>> >> >
>> >> >
>> >>
>> >> Yes, splitting sounds good to me. It could be useful for other ac97
>> >> drivers (e.g. em28xx).
>>
>> On a second thought, I'm not sure splitting the header is the best way
>> to proceed. Since swarm just uses some AC97 register definition
>> maybe we could just duplicate those (less than ten) macros in swarm
>> c file.
>>
>> It's a less intrusive aproach and it allows us to remove the unused
>> linux/ac97_codec.h.
>
> I'm OK in both ways.
>

Okey, consider this last two patches nacked and I'll prepare new ones.
Still, I would like someone to *at least* compile swarm driver with the patch.

Thanks,
Ezequiel.
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