linux-kernel - Re: [alsa-devel] [PATCH 07/14] soundwire: add initial definitions for sdw_master

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Date:   Fri, 8 Nov 2019 09:34:27 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc:     alsa-devel@...a-project.org, tiwai@...e.de,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        broonie@...nel.org, srinivas.kandagatla@...aro.org,
        jank@...ence.com, slawomir.blauciak@...el.com,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Bard liao <yung-chuan.liao@...ux.intel.com>,
        Rander Wang <rander.wang@...ux.intel.com>
Subject: Re: [alsa-devel] [PATCH 07/14] soundwire: add initial definitions
 for sdw_master_device

On 04-11-19, 08:42, Pierre-Louis Bossart wrote:
> 
> 
> On 11/3/19 1:30 AM, Vinod Koul wrote:
> > On 23-10-19, 16:28, Pierre-Louis Bossart wrote:
> > > Since we want an explicit support for the SoundWire Master device, add
> > > the definitions, following the Grey Bus example.
> > > 
> > > Open: do we need to set a variable when dealing with the master uevent?
> > 
> > I dont think we want that or we need that!
> 
> In GreyBus there are events and variables set, not sure what they were used
> for. The code works without setting an event, but we'd need to make a
> conscious design decision, and I am not too sure what usersace would use the
> informatio for.
> 
> > 
> > And to prevent that rather than adding a variable, can you please
> > modify the device_type and use separate ones for master_device and
> > slave_device
> 
> sorry, I don't get the comment. There is only already a different device
> type
> 
> 
> struct bus_type sdw_bus_type = {
> 	.name = "soundwire",
> 	.match = sdw_bus_match,
> 	.uevent = sdw_uevent,

We can remove this

> };
> 
> struct device_type sdw_slave_type = {
> 	.name =		"sdw_slave",
> 	.release =	sdw_slave_release,

Add here:

        uevent = sdw_uevent,

> };
> 
> struct device_type sdw_md_type = {
> 	.name =		"soundwire_master",
> 	.release =	sdw_md_release,
> };

And not have here!

Problem solved!

-- 
~Vinod