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From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
To: clemens@ladisch.de, tiwai@suse.de
Cc: alsa-devel@alsa-project.org
Subject: [alsa-devel] [PATCH 05/12] ALSA: dice: share PCM buffer size for both direction
Date: Fri, 18 Oct 2019 00:54:17 +0900	[thread overview]
Message-ID: <20191017155424.885-6-o-takashi@sakamocchi.jp> (raw)
In-Reply-To: <20191017155424.885-1-o-takashi@sakamocchi.jp>

This commit allows ALSA dice driver to share PCM buffer size for both
capture and playback PCM substream. When AMDTP domain starts for one
of the PCM substream, buffer size of the PCM substream is stores to
AMDTP domain structure. Some AMDTP streams have already run with the
buffer size when another PCM substream starts, therefore the PCM
substream has a constraint to its buffer size.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
---
 sound/firewire/dice/dice-midi.c   |  2 +-
 sound/firewire/dice/dice-pcm.c    | 20 +++++++++++++++++---
 sound/firewire/dice/dice-stream.c |  5 +++--
 sound/firewire/dice/dice.h        |  3 ++-
 4 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/sound/firewire/dice/dice-midi.c b/sound/firewire/dice/dice-midi.c
index 69c3c06bd7aa..4c2998034313 100644
--- a/sound/firewire/dice/dice-midi.c
+++ b/sound/firewire/dice/dice-midi.c
@@ -17,7 +17,7 @@ static int midi_open(struct snd_rawmidi_substream *substream)
 
 	mutex_lock(&dice->mutex);
 
-	err = snd_dice_stream_reserve_duplex(dice, 0, 0);
+	err = snd_dice_stream_reserve_duplex(dice, 0, 0, 0);
 	if (err >= 0) {
 		++dice->substreams_counter;
 		err = snd_dice_stream_start_duplex(dice);
diff --git a/sound/firewire/dice/dice-pcm.c b/sound/firewire/dice/dice-pcm.c
index 813c9ffbeced..7c0c34c5bd47 100644
--- a/sound/firewire/dice/dice-pcm.c
+++ b/sound/firewire/dice/dice-pcm.c
@@ -204,6 +204,7 @@ static int pcm_open(struct snd_pcm_substream *substream)
 	if (!internal ||
 	    (dice->substreams_counter > 0 && d->events_per_period > 0)) {
 		unsigned int frames_per_period = d->events_per_period;
+		unsigned int frames_per_buffer = d->events_per_buffer;
 		unsigned int rate;
 
 		err = snd_dice_transaction_get_rate(dice, &rate);
@@ -217,8 +218,10 @@ static int pcm_open(struct snd_pcm_substream *substream)
 
 		if (frames_per_period > 0) {
 			// For double_pcm_frame quirk.
-			if (rate > 96000)
+			if (rate > 96000) {
 				frames_per_period *= 2;
+				frames_per_buffer *= 2;
+			}
 
 			err = snd_pcm_hw_constraint_minmax(substream->runtime,
 					SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
@@ -227,6 +230,14 @@ static int pcm_open(struct snd_pcm_substream *substream)
 				mutex_unlock(&dice->mutex);
 				goto err_locked;
 			}
+
+			err = snd_pcm_hw_constraint_minmax(substream->runtime,
+					SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+					frames_per_buffer, frames_per_buffer);
+			if (err < 0) {
+				mutex_unlock(&dice->mutex);
+				goto err_locked;
+			}
 		}
 	}
 
@@ -263,13 +274,16 @@ static int pcm_hw_params(struct snd_pcm_substream *substream,
 	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 		unsigned int rate = params_rate(hw_params);
 		unsigned int events_per_period = params_period_size(hw_params);
+		unsigned int events_per_buffer = params_buffer_size(hw_params);
 
 		mutex_lock(&dice->mutex);
 		// For double_pcm_frame quirk.
-		if (rate > 96000)
+		if (rate > 96000) {
 			events_per_period /= 2;
+			events_per_buffer /= 2;
+		}
 		err = snd_dice_stream_reserve_duplex(dice, rate,
-						     events_per_period);
+					events_per_period, events_per_buffer);
 		if (err >= 0)
 			++dice->substreams_counter;
 		mutex_unlock(&dice->mutex);
diff --git a/sound/firewire/dice/dice-stream.c b/sound/firewire/dice/dice-stream.c
index b4ef08bd7e8f..0cff346e8052 100644
--- a/sound/firewire/dice/dice-stream.c
+++ b/sound/firewire/dice/dice-stream.c
@@ -279,7 +279,8 @@ static void finish_session(struct snd_dice *dice, struct reg_params *tx_params,
 }
 
 int snd_dice_stream_reserve_duplex(struct snd_dice *dice, unsigned int rate,
-				   unsigned int events_per_period)
+				   unsigned int events_per_period,
+				   unsigned int events_per_buffer)
 {
 	unsigned int curr_rate;
 	int err;
@@ -327,7 +328,7 @@ int snd_dice_stream_reserve_duplex(struct snd_dice *dice, unsigned int rate,
 			goto error;
 
 		err = amdtp_domain_set_events_per_period(&dice->domain,
-							 events_per_period, 0);
+					events_per_period, events_per_buffer);
 		if (err < 0)
 			goto error;
 	}
diff --git a/sound/firewire/dice/dice.h b/sound/firewire/dice/dice.h
index 1f9e3502974e..16366773e22e 100644
--- a/sound/firewire/dice/dice.h
+++ b/sound/firewire/dice/dice.h
@@ -211,7 +211,8 @@ void snd_dice_stream_stop_duplex(struct snd_dice *dice);
 int snd_dice_stream_init_duplex(struct snd_dice *dice);
 void snd_dice_stream_destroy_duplex(struct snd_dice *dice);
 int snd_dice_stream_reserve_duplex(struct snd_dice *dice, unsigned int rate,
-				   unsigned int events_per_period);
+				   unsigned int events_per_period,
+				   unsigned int events_per_buffer);
 void snd_dice_stream_update_duplex(struct snd_dice *dice);
 int snd_dice_stream_detect_current_formats(struct snd_dice *dice);
 
-- 
2.20.1

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  parent reply	other threads:[~2019-10-17 15:59 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-17 15:54 [alsa-devel] [PATCH 00/12] ALSA: firewire: configure interval of hw IRQ via ALSA PCM interface Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 01/12] ALSA: firewire-lib: use variable size of queue for isoc packets instead of fixed size Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 02/12] ALSA: bebob: share PCM buffer size for both direction Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 03/12] ALSA: fireworks: " Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 04/12] ALSA: oxfw: " Takashi Sakamoto
2019-10-17 15:54 ` Takashi Sakamoto [this message]
2019-10-17 15:54 ` [alsa-devel] [PATCH 06/12] ALSA: firewire-digi00x: " Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 07/12] ALSA: firewire-tascam: " Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 08/12] ALSA: firewire-motu: " Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 09/12] ALSA: fireface: " Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 10/12] ALSA: firewire-lib: schedule hardware IRQ according to the size of PCM period Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 11/12] ALSA: firewire-lib: tune the maximum available " Takashi Sakamoto
2019-10-17 15:54 ` [alsa-devel] [PATCH 12/12] ALSA: firewire-lib: tune the minimum " Takashi Sakamoto
2019-10-18  2:37 ` [alsa-devel] [PATCH 00/12] ALSA: firewire: configure interval of hw IRQ via ALSA PCM interface Takashi Iwai

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