linux-kernel - Re: [PATCH v5 00/15] soundwire: Add a new SoundWire subsystem

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Date:   Mon, 11 Dec 2017 17:30:03 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Vinod Koul <vinod.koul@...el.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        ALSA <alsa-devel@...a-project.org>, Mark <broonie@...nel.org>,
        Pierre <pierre-louis.bossart@...ux.intel.com>,
        patches.audio@...el.com, alan@...ux.intel.com,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Sagar Dharia <sdharia@...eaurora.org>,
        srinivas.kandagatla@...aro.org, plai@...eaurora.org,
        Sudheer Papothi <spapothi@...eaurora.org>
Subject: Re: [PATCH v5 00/15] soundwire: Add a new SoundWire subsystem

On Wed, 06 Dec 2017 16:46:56 +0100,
Vinod Koul wrote:
> 
> This patch series adds a new SoundWire subsystem which implements a
> new MIPI bus protocol 'SoundWire'.
> 
> The SoundWire protocol is a robust, scalable, low complexity, low
> power, low latency, two-pin (clock and data) multi-drop bus that
> allows for the transfer of multiple audio streams and embedded
> control/commands.  SoundWire provides synchronization capabilities
> and supports both PCM and PDM, multichannel data, isochronous and
> asynchronous modes.
> 
> This series adds SoundWire Bus, IO transfers, DisCo (Discovery and
> Configuration) sysfs interface, regmap and Documentation summary
> 
> This patch series is also available on
> git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire.git topic/patch_v5
> 
> v4: https://lkml.org/lkml/2017/12/1/205
> v3: https://lkml.org/lkml/2017/11/30/160
> v2: https://lkml.org/lkml/2017/11/10/216
> v1: https://lkml.org/lkml/2017/10/18/1030
> RFC: https://lkml.org/lkml/2016/10/21/395
> 
> Changes in v5:
> - Address comments by Pierre
>   - add reference to mid.mipi.org in documentation
>   - add group and master device number and don't use those for enumeration
>   - fix unused calls in disco code and also remove superfluous initialization
>   - remove sdw_transfer apis slave arg, make enum values integer and not
>     bitmaps
>   - clarify the sdw_program_device_num loop and fix interrupt handling
> 
> Changes in v4:
> - Remove text licenses and add SPDX tags only with C99 style comments
> - make bus_type code as GPL v2.0 only
> 
> Changes in v3:
> - Update the kernel-doc styles and fix included headers for files
> - handle dev_pm_domain_attach() for defered probe
> - remove OF placeholders
> - change regmap license to GPLv2 only
> 
> Changes in v2:
> - move documentation into driver-api and do rst conversion
> - fix documentation comments
> - add SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) to all
>   source files
> - rework the transfer logic and paging logic as commented on v1
> - remove dummy sysfs fns
> - registration checks and fixes
> - remove slave check for regamp as that turned superfluous
> - remove depends SoundWire symbol
> - make modalias api arg const
> - use bitmap for tracking assigned
> - add counter for report present tracking
> todo: add the dt-bindings

The patch series looks mostly OK, so with some nitpicking I've sent in
each reply, feel free to take my ack:
  Reviewed-by: Takashi Iwai <tiwai@...e.de>


thanks,

Takashi