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ssp: move mclk request/release to pre_start and post_stop 

For power saving, we should release the mclk when not used, postpone the
requesting to pre_start, and release it at post_stop.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
This commit is contained in:
Keyon Jie 2021-01-06 19:38:18 +08:00 committed by Liam Girdwood
parent b90315f0f0
commit d5840a9200
1 changed files with 14 additions and 11 deletions
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25
src/drivers/intel/ssp/ssp.c
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@ -322,14 +322,6 @@ static int ssp_set_config(struct dai *dai,
goto out;
}
/* MCLK config */
ret = mn_set_mclk(config->ssp.mclk_id, config->ssp.mclk_rate);
if (ret < 0) {
dai_err(dai, "invalid mclk_rate = %d for mclk_id = %d",
config->ssp.mclk_rate, config->ssp.mclk_id);
goto out;
}
/* calc frame width based on BCLK and rate - must be divisable */
if (config->ssp.bclk_rate % config->ssp.fsync_rate) {
dai_err(dai, "ssp_set_config(): BCLK %d is not divisable by rate %d",
@ -643,6 +635,14 @@ static int ssp_pre_start(struct dai *dai)
ssp->state[SOF_IPC_STREAM_CAPTURE] == COMP_STATE_ACTIVE)
return 0;
/* MCLK config */
ret = mn_set_mclk(config->ssp.mclk_id, config->ssp.mclk_rate);
if (ret < 0) {
dai_err(dai, "invalid mclk_rate = %d for mclk_id = %d",
config->ssp.mclk_rate, config->ssp.mclk_id);
goto out;
}
sscr0 = ssp_read(dai, SSCR0);
#if CONFIG_INTEL_MN
@ -698,14 +698,17 @@ out:
*/
static void ssp_post_stop(struct dai *dai)
{
#if CONFIG_INTEL_MN
struct ssp_pdata *ssp = dai_get_drvdata(dai);
/* release bclk if SSP is inactive */
/* release clocks if SSP is inactive */
if (ssp->state[SOF_IPC_STREAM_PLAYBACK] != COMP_STATE_ACTIVE &&
ssp->state[SOF_IPC_STREAM_CAPTURE] != COMP_STATE_ACTIVE)
ssp->state[SOF_IPC_STREAM_CAPTURE] != COMP_STATE_ACTIVE) {
dai_info(dai, "releasing BCLK/MCLK clocks for SSP%d...", dai->index);
#if CONFIG_INTEL_MN
mn_release_bclk(dai->index);
#endif
mn_release_mclk(ssp->config.ssp.mclk_id);
}
}
/* get SSP hw params */