diff mbox series

[1/4] ALSA: emu10k1: fix capture buffer size confusion

Message ID 20230523200709.236059-2-oswald.buddenhagen@gmx.de
State Accepted
Commit d2baa153c328efbbc3c4b939662e058b2cb544fd
Headers show
Series ALSA: emu10k1: capture-related improvements | expand

Commit Message

Oswald Buddenhagen May 23, 2023, 8:07 p.m. UTC 
The buffer size register sets the size of the whole buffer, not just one
period. We actually handled it like that, except that the constraint was
set on the wrong parameter. The period size is implicitly constrained by
the buffer size and the fixed period count of 2.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
---
 sound/pci/emu10k1/emupcm.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/sound/pci/emu10k1/emupcm.c b/sound/pci/emu10k1/emupcm.c
index 0572dfb80943..6a24e3e80aea 100644
--- a/sound/pci/emu10k1/emupcm.c
+++ b/sound/pci/emu10k1/emupcm.c
@@ -122,20 +122,20 @@  static int snd_emu10k1_pcm_channel_alloc(struct snd_emu10k1_pcm *epcm,
 	return 0;
 }
 
-static const unsigned int capture_period_sizes[31] = {
+static const unsigned int capture_buffer_sizes[31] = {
 	384,	448,	512,	640,
 	384*2,	448*2,	512*2,	640*2,
 	384*4,	448*4,	512*4,	640*4,
 	384*8,	448*8,	512*8,	640*8,
 	384*16,	448*16,	512*16,	640*16,
 	384*32,	448*32,	512*32,	640*32,
 	384*64,	448*64,	512*64,	640*64,
 	384*128,448*128,512*128
 };
 
-static const struct snd_pcm_hw_constraint_list hw_constraints_capture_period_sizes = {
+static const struct snd_pcm_hw_constraint_list hw_constraints_capture_buffer_sizes = {
 	.count = 31,
-	.list = capture_period_sizes,
+	.list = capture_buffer_sizes,
 	.mask = 0
 };
 
@@ -498,7 +498,7 @@  static int snd_emu10k1_capture_prepare(struct snd_pcm_substream *substream)
 	epcm->capture_bufsize = snd_pcm_lib_buffer_bytes(substream);
 	epcm->capture_bs_val = 0;
 	for (idx = 0; idx < 31; idx++) {
-		if (capture_period_sizes[idx] == epcm->capture_bufsize) {
+		if (capture_buffer_sizes[idx] == epcm->capture_bufsize) {
 			epcm->capture_bs_val = idx + 1;
 			break;
 		}
@@ -1154,9 +1154,10 @@  static int snd_emu10k1_capture_open(struct snd_pcm_substream *substream)
 	runtime->private_data = epcm;
 	runtime->private_free = snd_emu10k1_pcm_free_substream;
 	runtime->hw = snd_emu10k1_capture;
+	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+				   &hw_constraints_capture_buffer_sizes);
 	emu->capture_interrupt = snd_emu10k1_pcm_ac97adc_interrupt;
 	emu->pcm_capture_substream = substream;
-	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_capture_period_sizes);
 	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_capture_rates);
 	return 0;
 }
@@ -1193,9 +1194,10 @@  static int snd_emu10k1_capture_mic_open(struct snd_pcm_substream *substream)
 	runtime->hw.rates = SNDRV_PCM_RATE_8000;
 	runtime->hw.rate_min = runtime->hw.rate_max = 8000;
 	runtime->hw.channels_min = 1;
+	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+				   &hw_constraints_capture_buffer_sizes);
 	emu->capture_mic_interrupt = snd_emu10k1_pcm_ac97mic_interrupt;
 	emu->pcm_capture_mic_substream = substream;
-	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_capture_period_sizes);
 	return 0;
 }
 
@@ -1300,9 +1302,10 @@  static int snd_emu10k1_capture_efx_open(struct snd_pcm_substream *substream)
 	epcm->capture_cr_val = emu->efx_voices_mask[0];
 	epcm->capture_cr_val2 = emu->efx_voices_mask[1];
 	spin_unlock_irq(&emu->reg_lock);
+	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+				   &hw_constraints_capture_buffer_sizes);
 	emu->capture_efx_interrupt = snd_emu10k1_pcm_efx_interrupt;
 	emu->pcm_capture_efx_substream = substream;
-	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_capture_period_sizes);
 	return 0;
 }