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From: Vinod Koul <vkoul@kernel.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org, pilsun.jang@samsung.com,
	khw0178.kim@samsung.com, lgirdwood@gmail.com, kimty@samsung.com,
	s47.kang@samsung.com, tiwai@suse.com,
	'Pierre-Louis Bossart' <pierre-louis.bossart@linux.intel.com>,
	hmseo@samsung.com, Gyeongtaek Lee <gt82.lee@samsung.com>,
	tkjung@samsung.com
Subject: Re: [PATCH] ALSA: compress: allow pause and resume during draining
Date: Mon, 12 Oct 2020 17:54:23 +0530	[thread overview]
Message-ID: <20201012122423.GJ2968@vkoul-mobl> (raw)
In-Reply-To: <s5hk0vwq65o.wl-tiwai@suse.de>

On 12-10-20, 09:01, Takashi Iwai wrote:
> On Mon, 12 Oct 2020 07:25:25 +0200,

> > So what if we add another state but keep it in kernel (hidden from
> > userspace)...?
> 
> That's fine, then it's just a kernel's business, and it should be
> determined which one makes the code better.
> 
> But, there are things to be considered, though:
> 
> - SNDRV_PCM_STATE_* is defined as snd_pcm_state_t with __bitwise.
>   This indicates that the type has to be defined in that way
>   explicitly.
> 
> - Having a value over SNDRV_PCM_STATE_LAST internally is hackish.
> 
> > Right now tinycompress does not make use of PCM streams, kernel handles
> > these. I am not aware of any other implementation.
> > 
> > So if the scope if within compress then it might work...
> 
> Yes.  But currently the API uses SND_PCM_* even for the compress
> stuff.  Changing this value means to have influence on PCM, even if
> PCM stuff doesn't use it yet.  (At least you'd need to increase
> SND_PCM_STATE_LAST, for example.)
> 
> That said, if we want to change only for compress API by assuming that
> the impact must be negligible, the first step would be to move from
> SND_PCM_STATE_* to the own state, SND_COMPRESS_STATE_*.  The values
> should be compatible, but this has to be changed at first.  Then you
> can introduce a new value there.

I think that sounds reasonable to me, we should not have used
SNDRV_PCM_STATE_* in the first place and long term fix for this should
be SNDRV_COMPRESS_STATE_

I will cook a patch for this

Thanks
-- 
~Vinod

  reply	other threads:[~2020-10-12 12:25 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200929084051epcas2p35fb2228ed1bdfce6a7ddf5b37c944823@epcas2p3.samsung.com>
2020-09-29  8:40 ` [PATCH] ALSA: compress: allow pause and resume during draining Gyeongtaek Lee
2020-09-29  8:54   ` Takashi Iwai
2020-09-29  9:17     ` Gyeongtaek Lee
2020-09-29 14:00       ` Pierre-Louis Bossart
2020-10-01 10:29     ` Vinod Koul
2020-10-01 15:28       ` Pierre-Louis Bossart
2020-10-06  6:21         ` Vinod Koul
2020-10-06 14:57           ` Pierre-Louis Bossart
2020-10-08  9:49             ` Gyeongtaek Lee
2020-10-09 15:13               ` Takashi Iwai
2020-10-09 17:43                 ` Jaroslav Kysela
2020-10-10  9:08                   ` Takashi Iwai
2020-10-12  5:25                     ` Vinod Koul
2020-10-12  7:01                       ` Takashi Iwai
2020-10-12 12:24                         ` Vinod Koul [this message]
2020-10-12 13:29                           ` Jaroslav Kysela
2020-10-12 13:55                             ` Vinod Koul
2020-10-12 14:10                               ` Jaroslav Kysela
2020-10-12 14:21                                 ` Takashi Iwai
2020-10-12 14:46                                   ` Jaroslav Kysela
2020-10-12 14:59                                     ` Takashi Iwai
2020-10-15 10:47                                       ` Gyeongtaek Lee
2020-10-20  5:23                                         ` Gyeongtaek Lee
2020-10-26  9:18                                         ` Gyeongtaek Lee
2020-10-26 17:01                                           ` Takashi Iwai
2020-10-27  1:56                                             ` Gyeongtaek Lee
     [not found] <CGME20200928105009epcas2p4a65d50d9d09800281395a490d1844ef3@epcas2p4.samsung.com>
2020-09-28 10:50 ` Gyeongtaek Lee
2020-09-28 11:13   ` Jaroslav Kysela
2020-09-28 14:34     ` Pierre-Louis Bossart
2020-09-29  1:51       ` Gyeongtaek Lee
2020-09-29  7:12         ` Takashi Iwai
2020-09-29 17:27           ` Jaroslav Kysela
2020-09-30  9:35             ` Takashi Iwai
2020-09-30  9:57               ` Jaroslav Kysela
2020-09-30 10:33                 ` Takashi Iwai
2020-09-30 11:23                   ` Jaroslav Kysela
2020-10-01 10:35               ` Vinod Koul

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