summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJerome Brunet <jbrunet@baylibre.com>2021-10-20 14:42:17 +0300
committerMark Brown <broonie@kernel.org>2021-10-22 15:25:48 +0300
commitbf5e4887eeddb48480568466536aa08ec7f179a5 (patch)
tree165f0460859f504c5de7d6d9b1b6bc9333fbed4e
parente138233e56e9829e65b6293887063a1a3ccb2d68 (diff)
downloadlinux-bf5e4887eeddb48480568466536aa08ec7f179a5.tar.xz
ASoC: meson: axg-tdm-interface: manage formatters in trigger
So far, the formatters have been reset/enabled using the .prepare() callback. This was done in this callback because walking the formatters use a mutex so it could not be done in .trigger(), which is atomic by default. It turns out there is a problem on capture path of the AXG series. The FIFO may get out of sync with the TDM decoder if the IP are not enabled in a specific order. The FIFO must be enabled before the formatter starts producing data. IOW, we must deal with FE before the BE. The .prepare() callback is called on the BEs before the FE so it is not OK for the AXG. The .trigger() callback order can be configured, and it deals with the FE before the BEs by default. To solve our problem, we just need to start and stop the formatters from the .trigger() callback. It is OK do so now that the links have been made 'nonatomic' in the card driver. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Link: https://lore.kernel.org/r/20211020114217.133153-3-jbrunet@baylibre.com Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--sound/soc/meson/axg-tdm-interface.c26
1 files changed, 21 insertions, 5 deletions
diff --git a/sound/soc/meson/axg-tdm-interface.c b/sound/soc/meson/axg-tdm-interface.c
index 87cac440b369..db077773af7a 100644
--- a/sound/soc/meson/axg-tdm-interface.c
+++ b/sound/soc/meson/axg-tdm-interface.c
@@ -351,13 +351,29 @@ static int axg_tdm_iface_hw_free(struct snd_pcm_substream *substream,
return 0;
}
-static int axg_tdm_iface_prepare(struct snd_pcm_substream *substream,
+static int axg_tdm_iface_trigger(struct snd_pcm_substream *substream,
+ int cmd,
struct snd_soc_dai *dai)
{
- struct axg_tdm_stream *ts = snd_soc_dai_get_dma_data(dai, substream);
+ struct axg_tdm_stream *ts =
+ snd_soc_dai_get_dma_data(dai, substream);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ axg_tdm_stream_start(ts);
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_STOP:
+ axg_tdm_stream_stop(ts);
+ break;
+ default:
+ return -EINVAL;
+ }
- /* Force all attached formatters to update */
- return axg_tdm_stream_reset(ts);
+ return 0;
}
static int axg_tdm_iface_remove_dai(struct snd_soc_dai *dai)
@@ -397,8 +413,8 @@ static const struct snd_soc_dai_ops axg_tdm_iface_ops = {
.set_fmt = axg_tdm_iface_set_fmt,
.startup = axg_tdm_iface_startup,
.hw_params = axg_tdm_iface_hw_params,
- .prepare = axg_tdm_iface_prepare,
.hw_free = axg_tdm_iface_hw_free,
+ .trigger = axg_tdm_iface_trigger,
};
/* TDM Backend DAIs */