diff options
| author | Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> | 2024-12-10 19:09:46 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-12-11 13:24:07 +0000 |
| commit | 1fc778f7c833aeb13041adc06f016f1a2dff7350 (patch) | |
| tree | b5649fef38bf2b36283bc492f4701fb5dbc60f1c | |
| parent | fc2a31affb22394d1d74d3ecc86b5c68da33d52a (diff) | |
ASoC: renesas: rz-ssi: Add suspend to RAM support
The SSIF-2 IP is available on the Renesas RZ/G3S SoC. The Renesas RZ/G3S
SoC supports a power-saving mode where power to most of the SoC
components is turned off. Add suspend/resume support to the SSIF-2 driver
to support this power-saving mode.
On SNDRV_PCM_TRIGGER_SUSPEND trigger the SSI is stopped (the stream
user pointer is left untouched to avoid breaking user space and the dma
buffer pointer is set to zero), on SNDRV_PCM_TRIGGER_RESUME software reset
is issued for the SSIF-2 IP and the clocks are re-configured.
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20241210170953.2936724-18-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | sound/soc/renesas/rz-ssi.c | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/sound/soc/renesas/rz-ssi.c b/sound/soc/renesas/rz-ssi.c index 486822d79458..d48e2e7356b6 100644 --- a/sound/soc/renesas/rz-ssi.c +++ b/sound/soc/renesas/rz-ssi.c @@ -782,6 +782,32 @@ no_dma: return -ENODEV; } +static int rz_ssi_trigger_resume(struct rz_ssi_priv *ssi) +{ + int ret; + + if (rz_ssi_is_stream_running(&ssi->playback) || + rz_ssi_is_stream_running(&ssi->capture)) + return 0; + + ret = rz_ssi_swreset(ssi); + if (ret) + return ret; + + return rz_ssi_clk_setup(ssi, ssi->hw_params_cache.rate, + ssi->hw_params_cache.channels); +} + +static void rz_ssi_streams_suspend(struct rz_ssi_priv *ssi) +{ + if (rz_ssi_is_stream_running(&ssi->playback) || + rz_ssi_is_stream_running(&ssi->capture)) + return; + + ssi->playback.dma_buffer_pos = 0; + ssi->capture.dma_buffer_pos = 0; +} + static int rz_ssi_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { @@ -790,8 +816,16 @@ static int rz_ssi_dai_trigger(struct snd_pcm_substream *substream, int cmd, int ret = 0, i, num_transfer = 1; switch (cmd) { + case SNDRV_PCM_TRIGGER_RESUME: + ret = rz_ssi_trigger_resume(ssi); + if (ret) + return ret; + + fallthrough; + case SNDRV_PCM_TRIGGER_START: - rz_ssi_stream_init(strm, substream); + if (cmd == SNDRV_PCM_TRIGGER_START) + rz_ssi_stream_init(strm, substream); if (ssi->dma_rt) { bool is_playback; @@ -819,6 +853,12 @@ static int rz_ssi_dai_trigger(struct snd_pcm_substream *substream, int cmd, ret = rz_ssi_start(ssi, strm); break; + + case SNDRV_PCM_TRIGGER_SUSPEND: + rz_ssi_stop(ssi, strm); + rz_ssi_streams_suspend(ssi); + break; + case SNDRV_PCM_TRIGGER_STOP: rz_ssi_stop(ssi, strm); rz_ssi_stream_quit(ssi, strm); @@ -958,7 +998,8 @@ static const struct snd_soc_dai_ops rz_ssi_dai_ops = { static const struct snd_pcm_hardware rz_ssi_pcm_hardware = { .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_MMAP_VALID, + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_RESUME, .buffer_bytes_max = PREALLOC_BUFFER, .period_bytes_min = 32, .period_bytes_max = 8192, @@ -1201,6 +1242,7 @@ static int rz_ssi_runtime_resume(struct device *dev) static const struct dev_pm_ops rz_ssi_pm_ops = { RUNTIME_PM_OPS(rz_ssi_runtime_suspend, rz_ssi_runtime_resume, NULL) + SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) }; static struct platform_driver rz_ssi_driver = { |