While the HDAudio codec driver expectations must be met - store valid pointer to HDAudio LINK stream in substream->runtime->private_data - the code is more readable and easier to maintain if dma_data stores pointers to both HOST and LINK stream.
DAI BE operations can refer to the LINK stream with data->link_stream, similarly to how DAI FE operations access the HOST stream with data->host_stream.
Signed-off-by: Cezary Rojewski cezary.rojewski@intel.com --- sound/soc/intel/avs/pcm.c | 40 +++++++++++++++++++-------------------- 1 file changed, 19 insertions(+), 21 deletions(-)
diff --git a/sound/soc/intel/avs/pcm.c b/sound/soc/intel/avs/pcm.c index d4557b7b1c6c..168e16e82116 100644 --- a/sound/soc/intel/avs/pcm.c +++ b/sound/soc/intel/avs/pcm.c @@ -23,13 +23,12 @@ struct avs_dma_data { struct avs_tplg_path_template *template; struct avs_path *path; struct avs_dev *adev; - /* - * link stream is stored within substream's runtime - * private_data to fulfill the needs of codec BE path - * - * host stream assigned - */ - struct hdac_ext_stream *host_stream; + + /* LINK-stream utilized in BE operations while HOST in FE ones. */ + union { + struct hdac_ext_stream *link_stream; + struct hdac_ext_stream *host_stream; + };
struct snd_pcm_substream *substream; }; @@ -263,6 +262,7 @@ static int avs_dai_hda_be_startup(struct snd_pcm_substream *substream, struct sn { struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); struct hdac_ext_stream *link_stream; + struct avs_dma_data *data; struct hda_codec *codec; int ret;
@@ -278,18 +278,18 @@ static int avs_dai_hda_be_startup(struct snd_pcm_substream *substream, struct sn return -EBUSY; }
+ data = snd_soc_dai_get_dma_data(dai, substream); + data->link_stream = link_stream; substream->runtime->private_data = link_stream; return 0; }
static void avs_dai_hda_be_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { - struct hdac_ext_stream *link_stream; + struct avs_dma_data *data = snd_soc_dai_get_dma_data(dai, substream);
- link_stream = substream->runtime->private_data; - snd_hdac_ext_stream_release(link_stream, HDAC_EXT_STREAM_TYPE_LINK); + snd_hdac_ext_stream_release(data->link_stream, HDAC_EXT_STREAM_TYPE_LINK); substream->runtime->private_data = NULL; - avs_dai_shutdown(substream, dai); }
@@ -297,16 +297,13 @@ static int avs_dai_hda_be_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params, struct snd_soc_dai *dai) { struct avs_dma_data *data; - struct hdac_ext_stream *link_stream;
data = snd_soc_dai_get_dma_data(dai, substream); if (data->path) return 0;
- link_stream = substream->runtime->private_data; - return avs_dai_be_hw_params(substream, hw_params, dai, - hdac_stream(link_stream)->stream_tag - 1); + hdac_stream(data->link_stream)->stream_tag - 1); }
static int avs_dai_hda_be_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) @@ -323,7 +320,7 @@ static int avs_dai_hda_be_hw_free(struct snd_pcm_substream *substream, struct sn if (!data->path) return 0;
- link_stream = substream->runtime->private_data; + link_stream = data->link_stream; link_stream->link_prepared = false; avs_path_free(data->path); data->path = NULL; @@ -347,13 +344,16 @@ static int avs_dai_hda_be_prepare(struct snd_pcm_substream *substream, struct sn struct snd_soc_pcm_stream *stream_info; struct hdac_ext_stream *link_stream; struct hdac_ext_link *link; + struct avs_dma_data *data; struct hda_codec *codec; struct hdac_bus *bus; unsigned int format_val; unsigned int bits; int ret;
- link_stream = runtime->private_data; + data = snd_soc_dai_get_dma_data(dai, substream); + link_stream = data->link_stream; + if (link_stream->link_prepared) return 0;
@@ -387,14 +387,12 @@ static int avs_dai_hda_be_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); - struct hdac_ext_stream *link_stream; struct avs_dma_data *data; int ret = 0;
dev_dbg(dai->dev, "entry %s cmd=%d\n", __func__, cmd);
data = snd_soc_dai_get_dma_data(dai, substream); - link_stream = substream->runtime->private_data;
switch (cmd) { case SNDRV_PCM_TRIGGER_RESUME: @@ -403,7 +401,7 @@ static int avs_dai_hda_be_trigger(struct snd_pcm_substream *substream, int cmd, fallthrough; case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - snd_hdac_ext_stream_start(link_stream); + snd_hdac_ext_stream_start(data->link_stream);
ret = avs_path_pause(data->path); if (ret < 0) { @@ -426,7 +424,7 @@ static int avs_dai_hda_be_trigger(struct snd_pcm_substream *substream, int cmd, if (ret < 0) dev_err(dai->dev, "pause BE path failed: %d\n", ret);
- snd_hdac_ext_stream_clear(link_stream); + snd_hdac_ext_stream_clear(data->link_stream);
ret = avs_path_reset(data->path); if (ret < 0)