linux-kernel - Re: [alsa-devel] [RFC PATCH 21/40] soundwire: export helpers to find row and column values

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Date:   Fri, 2 Aug 2019 22:34:50 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc:     Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
        alsa-devel@...a-project.org, tiwai@...e.de,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        broonie@...nel.org, srinivas.kandagatla@...aro.org,
        jank@...ence.com, slawomir.blauciak@...el.com,
        Sanyog Kale <sanyog.r.kale@...el.com>
Subject: Re: [alsa-devel] [RFC PATCH 21/40] soundwire: export helpers to find
 row and column values

On 26-07-19, 10:26, Pierre-Louis Bossart wrote:
> 
> 
> On 7/26/19 9:43 AM, Guennadi Liakhovetski wrote:
> > On Thu, Jul 25, 2019 at 06:40:13PM -0500, Pierre-Louis Bossart wrote:
> > > Add a prefix for common tables and export 2 helpers to set the frame
> > > shapes based on row/col values.
> > > 
> > > Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> > > ---
> > >   drivers/soundwire/bus.h    |  7 +++++--
> > >   drivers/soundwire/stream.c | 14 ++++++++------
> > >   2 files changed, 13 insertions(+), 8 deletions(-)
> > > 
> > > diff --git a/drivers/soundwire/bus.h b/drivers/soundwire/bus.h
> > > index 06ac4adb0074..c57c9c23f6ca 100644
> > > --- a/drivers/soundwire/bus.h
> > > +++ b/drivers/soundwire/bus.h
> > > @@ -73,8 +73,11 @@ struct sdw_msg {
> > >   #define SDW_DOUBLE_RATE_FACTOR		2
> > > -extern int rows[SDW_FRAME_ROWS];
> > > -extern int cols[SDW_FRAME_COLS];
> > > +extern int sdw_rows[SDW_FRAME_ROWS];
> > > +extern int sdw_cols[SDW_FRAME_COLS];
> > 
> > So these arrays actually have to be exported? In the current (5.2) sources they
> > seem to only be used in stream.c, maybe make them static there?
> > 
> > > +
> > > +int sdw_find_row_index(int row);
> > > +int sdw_find_col_index(int col);
> 
> yes, they need to be exported, they are used by the allocation algorithm (in
> Patch 27).
> Others will need this for non-Intel solutions, it's really a part of the
> standard definition and should be shared.
> I can improve the commit message to make this explicit.

Yes that would help! And also move it to before it's usage so it clear
that it is used in next one.

-- 
~Vinod