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soundwire: cadence_master: make clock stop exit configurable on init 

The use of clock stop is not a requirement, the IP can e.g. be
completely power gated and not detect any wakes while in s2idle/deep
sleep.

For now clock-stop is not supported anyways so the control parameter
is always false. This will be revisited when we add clock stop.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191022235448.17586-6-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2019-10-22 18:54:48 -05:00 committed by Vinod Koul
parent 9e3d47fb2b
commit 3ccb8551f5
3 changed files with 10 additions and 9 deletions
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5
drivers/soundwire/cadence_master.c
View File

@ -979,7 +979,7 @@ static u32 cdns_set_initial_frame_shape(int n_rows, int n_cols)
* sdw_cdns_init() - Cadence initialization
* @cdns: Cadence instance
*/
int sdw_cdns_init(struct sdw_cdns *cdns)
int sdw_cdns_init(struct sdw_cdns *cdns, bool clock_stop_exit)
{
struct sdw_bus *bus = &cdns->bus;
struct sdw_master_prop *prop = &bus->prop;
@ -987,13 +987,14 @@ int sdw_cdns_init(struct sdw_cdns *cdns)
int divider;
int ret;
/* Exit clock stop */
if (clock_stop_exit) {
ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL,
CDNS_MCP_CONTROL_CLK_STOP_CLR);
if (ret < 0) {
dev_err(cdns->dev, "Couldn't exit from clock stop\n");
return ret;
}
}
/* Set clock divider */
divider = (prop->mclk_freq / prop->max_clk_freq) - 1;

2
drivers/soundwire/cadence_master.h
View File

@ -138,7 +138,7 @@ extern struct sdw_master_ops sdw_cdns_master_ops;
irqreturn_t sdw_cdns_irq(int irq, void *dev_id);
irqreturn_t sdw_cdns_thread(int irq, void *dev_id);
int sdw_cdns_init(struct sdw_cdns *cdns);
int sdw_cdns_init(struct sdw_cdns *cdns, bool clock_stop_exit);
int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
struct sdw_cdns_stream_config config);
int sdw_cdns_exit_reset(struct sdw_cdns *cdns);

2
drivers/soundwire/intel.c
View File

@ -903,7 +903,7 @@ static int intel_init(struct sdw_intel *sdw)
intel_link_power_up(sdw);
intel_shim_init(sdw);
return sdw_cdns_init(&sdw->cdns);
return sdw_cdns_init(&sdw->cdns, false);
}
/*