linux-kernel - Re: [PATCH 2/2] ASoC: wsa881x: mark read_only

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Date:   Fri, 20 Mar 2020 19:32:43 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     broonie@...nel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     pierre-louis.bossart@...ux.intel.com, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Re: [PATCH 2/2] ASoC: wsa881x: mark read_only_wordlength flag

Hi Mark,

On 11-03-20, 11:35, Srinivas Kandagatla wrote:
> WSA881x works in PDM mode so the wordlength is fixed, which also makes
> the only field "WordLength" in DPN_BlockCtrl1 register a read-only.
> Writing to this register will throw up errors with Qualcomm Controller.
> So use ro_blockctrl1_reg flag to mark this field as read-only so that
> core will not write to this register.

I have applied the sdw patch. Since this depends on sdw patch, feel free
to pull the below tag before you apply this

The following changes since commit bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9:

  Linux 5.6-rc1 (2020-02-09 16:08:48 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire.git topic/ro_wordlength

for you to fetch changes up to a9107de4b03604ce0d279315c91b31b8065ee4ea:

  soundwire: stream: Add read_only_wordlength flag to port properties (2020-03-20 19:24:59 +0530)

----------------------------------------------------------------
Srinivas Kandagatla (1):
      soundwire: stream: Add read_only_wordlength flag to port properties

 drivers/soundwire/stream.c    | 16 +++++++++-------
 include/linux/soundwire/sdw.h |  2 ++
 2 files changed, 11 insertions(+), 7 deletions(-)

> 
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  sound/soc/codecs/wsa881x.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/sound/soc/codecs/wsa881x.c b/sound/soc/codecs/wsa881x.c
> index b59f1d0e7f84..35b44b297f9e 100644
> --- a/sound/soc/codecs/wsa881x.c
> +++ b/sound/soc/codecs/wsa881x.c
> @@ -394,6 +394,7 @@ static struct sdw_dpn_prop wsa_sink_dpn_prop[WSA881X_MAX_SWR_PORTS] = {
>  		.min_ch = 1,
>  		.max_ch = 1,
>  		.simple_ch_prep_sm = true,
> +		.read_only_wordlength = true,
>  	}, {
>  		/* COMP */
>  		.num = 2,
> @@ -401,6 +402,7 @@ static struct sdw_dpn_prop wsa_sink_dpn_prop[WSA881X_MAX_SWR_PORTS] = {
>  		.min_ch = 1,
>  		.max_ch = 1,
>  		.simple_ch_prep_sm = true,
> +		.read_only_wordlength = true,
>  	}, {
>  		/* BOOST */
>  		.num = 3,
> @@ -408,6 +410,7 @@ static struct sdw_dpn_prop wsa_sink_dpn_prop[WSA881X_MAX_SWR_PORTS] = {
>  		.min_ch = 1,
>  		.max_ch = 1,
>  		.simple_ch_prep_sm = true,
> +		.read_only_wordlength = true,
>  	}, {
>  		/* VISENSE */
>  		.num = 4,
> @@ -415,6 +418,7 @@ static struct sdw_dpn_prop wsa_sink_dpn_prop[WSA881X_MAX_SWR_PORTS] = {
>  		.min_ch = 1,
>  		.max_ch = 1,
>  		.simple_ch_prep_sm = true,
> +		.read_only_wordlength = true,
>  	}
>  };
>  
> -- 
> 2.21.0

-- 
~Vinod