From: Cezary Rojewski <cezary.rojewski@intel.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org,
gregkh@linuxfoundation.org, jank@cadence.com,
srinivas.kandagatla@linaro.org, Blauciak@vger.kernel.org,
Slawomir <slawomir.blauciak@intel.com>,
Sanyog Kale <sanyog.r.kale@intel.com>
Subject: Re: [PATCH 06/17] soundwire: cadence_master: use firmware defaults for frame shape
Date: Tue, 6 Aug 2019 17:27:28 +0200 [thread overview]
Message-ID: <03b6091b-af41-ac54-43c7-196a3583a731@intel.com> (raw)
In-Reply-To: <20190806005522.22642-7-pierre-louis.bossart@linux.intel.com>
On 2019-08-06 02:55, Pierre-Louis Bossart wrote:
> diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
> index 5d9729b4d634..89c55e4bb72c 100644
> --- a/drivers/soundwire/cadence_master.c
> +++ b/drivers/soundwire/cadence_master.c
> @@ -48,6 +48,8 @@
> #define CDNS_MCP_SSPSTAT 0xC
> #define CDNS_MCP_FRAME_SHAPE 0x10
> #define CDNS_MCP_FRAME_SHAPE_INIT 0x14
> +#define CDNS_MCP_FRAME_SHAPE_COL_MASK GENMASK(2, 0)
> +#define CDNS_MCP_FRAME_SHAPE_ROW_OFFSET 3
>
> #define CDNS_MCP_CONFIG_UPDATE 0x18
> #define CDNS_MCP_CONFIG_UPDATE_BIT BIT(0)
> @@ -175,7 +177,6 @@
> /* Driver defaults */
>
> #define CDNS_DEFAULT_CLK_DIVIDER 0
> -#define CDNS_DEFAULT_FRAME_SHAPE 0x30
> #define CDNS_DEFAULT_SSP_INTERVAL 0x18
> #define CDNS_TX_TIMEOUT 2000
>
> @@ -901,6 +902,20 @@ int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
> }
> EXPORT_SYMBOL(sdw_cdns_pdi_init);
>
> +static u32 cdns_set_initial_frame_shape(int n_rows, int n_cols)
> +{
> + u32 val;
> + int c;
> + int r;
> +
> + r = sdw_find_row_index(n_rows);
> + c = sdw_find_col_index(n_cols) & CDNS_MCP_FRAME_SHAPE_COL_MASK;
> +
> + val = (r << CDNS_MCP_FRAME_SHAPE_ROW_OFFSET) | c;
> +
> + return val;
> +}
> +
Guess this have been said already, but this function could be simplified
- unless you really want to keep explicit variable declaration. Both "c"
and "r" declarations could be merged into single line while "val" is not
needed at all.
One more thing - is AND bitwise op really needed for cols explicitly? We
know all col values upfront - these are static and declared in global
table nearby. Static declaration takes care of "initial range-check". Is
another one necessary?
Moreover, this is a _get_ and certainly not a _set_ type of function.
I'd even consider renaming it to: "cdns_get_frame_shape" as this is
neither a _set_ nor an explicit initial frame shape setter.
It might be even helpful to split two usages:
#define sdw_frame_shape(col_idx, row_idx) \
((row_idx << CDNS_MCP_FRAME_SHAPE_ROW_OFFSET) | col_idx)
u32 cdns_get_frame_shape(u16 rows, u16 cols)
{
u16 c, r;
r = sdw_find_row_index(rows);
c = sdw_find_col_index(cols);
return sdw_frame_shape(c, r);
}
The above may even be simplified into one-liner.
next prev parent reply other threads:[~2019-08-06 15:27 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 0:55 [PATCH 00/17] soundwire: fixes for 5.4 Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 01/17] soundwire: intel: prevent possible dereference in hw_params Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 02/17] soundwire: intel: fix channel number reported by hardware Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 03/17] soundwire: cadence_master: revisit interrupt settings Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 04/17] soundwire: bus: improve dynamic debug comments for enumeration Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 05/17] soundwire: export helpers to find row and column values Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 06/17] soundwire: cadence_master: use firmware defaults for frame shape Pierre-Louis Bossart
2019-08-06 15:27 ` Cezary Rojewski [this message]
2019-08-06 15:36 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-06 16:06 ` Cezary Rojewski
2019-08-14 4:31 ` Vinod Koul
2019-08-14 14:03 ` Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 07/17] soundwire: include mod_devicetable.h to avoid compiling warnings Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 08/17] soundwire: stream: fix disable sequence Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 09/17] soundwire: stream: remove unnecessary variable initializations Pierre-Louis Bossart
2019-08-06 15:31 ` Cezary Rojewski
2019-08-06 15:39 ` Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 10/17] soundwire: add new mclk_freq field for properties Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 11/17] soundwire: intel: read mclk_freq property from firmware Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 12/17] soundwire: cadence_master: make use of mclk_freq property Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 13/17] soundwire: cadence_master: fix divider setting in clock register Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 14/17] soundwire: intel: handle disabled links Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 15/17] soundwire: intel_init: add kernel module parameter to filter out links Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 16/17] soundwire: cadence_master: add kernel parameter to override interrupt mask Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 17/17] soundwire: intel: move shutdown() callback and don't export symbol Pierre-Louis Bossart
2019-08-21 9:07 ` [PATCH 00/17] soundwire: fixes for 5.4 Vinod Koul
2019-08-21 14:03 ` [alsa-devel] " Pierre-Louis Bossart
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=03b6091b-af41-ac54-43c7-196a3583a731@intel.com \
--to=cezary.rojewski@intel.com \
--cc=Blauciak@vger.kernel.org \
--cc=alsa-devel@alsa-project.org \
--cc=broonie@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=jank@cadence.com \
--cc=linux-kernel@vger.kernel.org \
--cc=pierre-louis.bossart@linux.intel.com \
--cc=sanyog.r.kale@intel.com \
--cc=slawomir.blauciak@intel.com \
--cc=srinivas.kandagatla@linaro.org \
--cc=tiwai@suse.de \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).