At Mon, 25 Mar 2013 10:47:31 -0700,
Dylan Reid wrote:
>
> On Sun, Feb 10, 2013 at 2:51 AM, Takashi Iwai <tiwai@xxxxxxx> wrote:
> > At Fri, 8 Feb 2013 18:31:44 -0800,
> > Ian Minett wrote:
> >>
> >> From: Ian Minett <ian_minett@xxxxxxxxxxxxxxxx>
> >>
> >> Add latency monitoring for playback, capture and DSP effects.
> >
> > Please give a bit more descriptions.
> > Looking at the patch, it doesn't implement only the latency monitoring
> > but actually reflecting to the runtime->delay.
> >
> > Also..
> >
> >
> >> Signed-off-by: Ian Minett <ian_minett@xxxxxxxxxxxxxxxx>
> >>
> >> diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
> >> index b52f00c..c797f65 100644
> >> --- a/sound/pci/hda/patch_ca0132.c
> >> +++ b/sound/pci/hda/patch_ca0132.c
> >> @@ -133,6 +133,12 @@ enum {
> >> /* Effects values size*/
> >> #define EFFECT_VALS_MAX_COUNT 12
> >>
> >> +#define DSP_CAPTURE_INIT_LATENCY 0
> >> +#define DSP_CRYSTAL_VOICE_LATENCY 124
> >> +#define DSP_PLAYBACK_INIT_LATENCY 13
> >> +#define DSP_PLAY_ENHANCEMENT_LATENCY 30
> >> +#define DSP_SPEAKER_OUT_LATENCY 7
> >> +
> >> struct ct_effect {
> >> char name[44];
> >> hda_nid_t nid;
> >> @@ -2761,8 +2767,27 @@ static void ca0132_cleanup_stream(struct hda_codec *codec, hda_nid_t nid)
> >> }
> >>
> >> /*
> >> - * PCM callbacks
> >> + * PCM playbacks
> >> */
> >> +static unsigned int ca0132_get_playback_latency(struct hda_codec *codec)
> >> +{
> >> + struct ca0132_spec *spec = codec->spec;
> >> + unsigned int latency = DSP_PLAYBACK_INIT_LATENCY;
> >> +
> >> + if (!dspload_is_loaded(codec))
> >> + return 0;
> >> +
> >> + if (spec->effects_switch[PLAY_ENHANCEMENT - EFFECT_START_NID]) {
> >> + if ((spec->effects_switch[SURROUND - EFFECT_START_NID]) ||
> >> + (spec->effects_switch[DIALOG_PLUS - EFFECT_START_NID]))
> >> + latency += DSP_PLAY_ENHANCEMENT_LATENCY;
> >> + }
> >> +
> >> + if (spec->cur_out_type == SPEAKER_OUT)
> >> + latency += DSP_SPEAKER_OUT_LATENCY;
> >> + return latency;
> >> +}
> >> +
> >> static int ca0132_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
> >> struct hda_codec *codec,
> >> unsigned int stream_tag,
> >> @@ -2770,6 +2795,16 @@ static int ca0132_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
> >> struct snd_pcm_substream *substream)
> >> {
> >> struct ca0132_spec *spec = codec->spec;
> >> + struct snd_pcm_runtime *runtime = substream->runtime;
> >> + unsigned int latency = ca0132_get_playback_latency(codec);
> >> +
> >> + if (spec->dsp_state == DSP_DOWNLOADING) {
> >> + spec->dsp_stream_id = stream_tag;
> >> + return 0;
> >> + }
> >> +
> >> + runtime->delay = bytes_to_frames(runtime, (latency * runtime->rate *
> >> + runtime->byte_align) / 1000);
> >>
> >> ca0132_setup_stream(codec, spec->dacs[0], stream_tag, 0, format);
> >>
> >> @@ -2834,8 +2869,22 @@ static int ca0132_dig_playback_pcm_close(struct hda_pcm_stream *hinfo,
> >> }
> >>
> >> /*
> >> - * Analog capture
> >> + * PCM capture
> >> */
> >> +
> >> +static unsigned int ca0132_get_capture_latency(struct hda_codec *codec)
> >> +{
> >> + struct ca0132_spec *spec = codec->spec;
> >> + unsigned int latency = DSP_CAPTURE_INIT_LATENCY;
> >> +
> >> + if (!dspload_is_loaded(codec))
> >> + return 0;
> >> +
> >> + if (spec->effects_switch[CRYSTAL_VOICE - EFFECT_START_NID])
> >> + latency += DSP_CRYSTAL_VOICE_LATENCY;
> >> + return latency;
> >> +}
> >> +
> >> static int ca0132_capture_pcm_prepare(struct hda_pcm_stream *hinfo,
> >> struct hda_codec *codec,
> >> unsigned int stream_tag,
> >> @@ -2843,9 +2892,16 @@ static int ca0132_capture_pcm_prepare(struct hda_pcm_stream *hinfo,
> >> struct snd_pcm_substream *substream)
> >> {
> >> struct ca0132_spec *spec = codec->spec;
> >> + struct snd_pcm_runtime *runtime = substream->runtime;
> >> + unsigned int latency = ca0132_get_capture_latency(codec);
> >>
> >> - ca0132_setup_stream(codec, spec->adcs[substream->number],
> >> - stream_tag, 0, format);
> >> + if (spec->dsp_state == DSP_DOWNLOADING)
> >> + return 0;
> >> +
> >> + runtime->delay = bytes_to_frames(runtime, (latency * runtime->rate *
> >> + runtime->byte_align) / 1000);
> >> +
> >> + ca0132_setup_stream(codec, hinfo->nid, stream_tag, 0, format);
> >>
> >> return 0;
> >> }
> >> @@ -3429,6 +3485,33 @@ static int ca0132_voicefx_set(struct hda_codec *codec, int enable)
> >> return 1;
> >> }
> >>
> >> +static void ca0132_update_latency(struct hda_codec *codec,
> >> + unsigned int direction)
> >> +{
> >> + struct ca0132_spec *spec = codec->spec;
> >> + unsigned int latency;
> >> + struct snd_pcm_substream *substr;
> >> + struct snd_pcm_runtime *runtime;
> >> +
> >> + if (spec->dsp_state == DSP_DOWNLOADING)
> >> + return;
> >> +
> >> + latency = (direction == SNDRV_PCM_STREAM_PLAYBACK)
> >> + ? ca0132_get_playback_latency(codec)
> >> + : ca0132_get_capture_latency(codec);
> >> +
> >> + substr = codec->pcm_info->pcm->streams[direction].substream;
> >> + while (substr) {
> >> + runtime = substr->runtime;
> >> + /* update latency only when frame_bits is set */
> >> + if (runtime && runtime->frame_bits)
> >> + runtime->delay = bytes_to_frames(runtime,
> >> + (latency * runtime->rate *
> >> + runtime->byte_align) / 1000);
> >> + substr = substr->next;
> >> + }
> >
> > I guess this isn't needed. Usually the pointer callback is performed
> > always before the inquiry of runtime->delay.
>
> Thanks for pointing that out Takashi. This will have no effect, as
> azx_get_position now recalculates the delay based on LPIB position.
>
> What was trying to be solved was that there is a large delay in the
> codec, and other codecs with integrated DSP. In this case it is
> greater than 100ms, depending on what effects are enabled. Is there a
> good was to add this delay to what is reported? Maybe allow the codec
> to specify a delay that is added to the calculation in
> azx_get_position?
I'm fine to add a new codec PCM ops for each azx_get_position call
if it helps.
Takashi
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