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Commit 3f7bf918 authored by Adrian Knoth's avatar Adrian Knoth Committed by Takashi Iwai
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ALSA: hdspm - Refactor sample rate acquisition 



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: default avatarAdrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 93c9d8ae

sound/pci/rme9652/hdspm.c

+13 −3
Original line number Diff line number Diff line
@@ -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. */