Re: [RFC PATCH 24/40] soundwire: cadence_master: use BIOS defaults for frame shape

Sanyog Kale
2019-08-05T09:59:22Z

On Thu, Jul 25, 2019 at 06:40:16PM -0500, Pierre-Louis Bossart wrote:
> Remove hard-coding and use BIOS values. If they are wrong use default
> 48x2 frame shape.
>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> ---
> drivers/soundwire/cadence_master.c | 19 +++++++++++++++++--
> 1 file changed, 17 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
> index 442f78c00f09..d84344e29f71 100644
> --- a/drivers/soundwire/cadence_master.c
> +++ b/drivers/soundwire/cadence_master.c
> @@ -175,7 +175,6 @@
> /* 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
>
> @@ -954,6 +953,20 @@ int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
> }
> EXPORT_SYMBOL(sdw_cdns_pdi_init);
>
> +static u32 cdns_set_default_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);
> +

Now i get why you need above functions to be exported, please ignore my
previous comment.

> + val = (r << 3) | c;
> +
> + return val;
> +}
> +
> /**
> * sdw_cdns_init() - Cadence initialization
> * @cdns: Cadence instance
> @@ -977,7 +990,9 @@ int sdw_cdns_init(struct sdw_cdns *cdns)
> cdns_writel(cdns, CDNS_MCP_CLK_CTRL0, val);
>
> /* Set the default frame shape */
> - cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, CDNS_DEFAULT_FRAME_SHAPE);
> + val = cdns_set_default_frame_shape(prop->default_row,
> + prop->default_col);
> + cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, val);
>
> /* Set SSP interval to default value */
> cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, CDNS_DEFAULT_SSP_INTERVAL);
> --
> 2.20.1
>

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