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ALSA: hdspm - Refactor sample rate acquisition

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This commit introduces hdspm_get_pll_freq() to avoid code duplication.
Reading the sample rate from the DDS register will be required by
upcoming code.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Adrian Knoth 2013-03-10 00:37:21 +01:00 committed by Takashi Iwai
parent 93c9d8ae0b
commit 3f7bf918bf
1 changed files with 13 additions and 3 deletions
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16
sound/pci/rme9652/hdspm.c
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@ -969,6 +969,7 @@ static int snd_hdspm_create_pcm(struct snd_card *card,
struct hdspm *hdspm);
static inline void snd_hdspm_initialize_midi_flush(struct hdspm *hdspm);
static inline int hdspm_get_pll_freq(struct hdspm *hdspm);
static int hdspm_update_simple_mixer_controls(struct hdspm *hdspm);
static int hdspm_autosync_ref(struct hdspm *hdspm);
static int snd_hdspm_set_defaults(struct hdspm *hdspm);
@ -1979,16 +1980,25 @@ static void hdspm_midi_tasklet(unsigned long arg)
/* get the system sample rate which is set */
static inline int hdspm_get_pll_freq(struct hdspm *hdspm)
{
unsigned int period, rate;
period = hdspm_read(hdspm, HDSPM_RD_PLL_FREQ);
rate = hdspm_calc_dds_value(hdspm, period);
return rate;
}
/**
* Calculate the real sample rate from the
* current DDS value.
**/
static int hdspm_get_system_sample_rate(struct hdspm *hdspm)
{
unsigned int period, rate;
unsigned int rate;
period = hdspm_read(hdspm, HDSPM_RD_PLL_FREQ);
rate = hdspm_calc_dds_value(hdspm, period);
rate = hdspm_get_pll_freq(hdspm);
if (rate > 207000) {
/* Unreasonable high sample rate as seen on PCI MADI cards. */