[ALSA] es1968 - Fix stuttering capture

Looks like the buffer size for the stereo capture has to be a
power of two.  Now added a constraint to buffer bytes.
Also removed unnecessary #if 0 lines.

Signed-off-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c
index dc84c18..2faf009 100644 (file)
--- a/sound/pci/es1968.c
+++ b/sound/pci/es1968.c
@@ -1554,10 +1554,7 @@ static int snd_es1968_playback_open(struct snd_pcm_substream *substream)
        runtime->hw = snd_es1968_playback;
        runtime->hw.buffer_bytes_max = runtime->hw.period_bytes_max =
                calc_available_memory_size(chip);
-#if 0
-       snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
-                                  1024);
-#endif
+
        spin_lock_irq(&chip->substream_lock);
        list_add(&es->list, &chip->substream_list);
        spin_unlock_irq(&chip->substream_lock);
@@ -1613,10 +1610,8 @@ static int snd_es1968_capture_open(struct snd_pcm_substream *substream)
        runtime->hw = snd_es1968_capture;
        runtime->hw.buffer_bytes_max = runtime->hw.period_bytes_max =
                calc_available_memory_size(chip) - 1024; /* keep MIXBUF size */
-#if 0
-       snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
-                                  1024);
-#endif
+       snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES);
+
        spin_lock_irq(&chip->substream_lock);
        list_add(&es->list, &chip->substream_list);
        spin_unlock_irq(&chip->substream_lock);