Commit a97bda7d authored May 30, 2012 by Adrian Knoth Committed by Takashi Iwai May 31, 2012

ALSA: hdspm - Work around broken DDS value on PCI RME MADI



On PCI RME MADI cards, the PLL register does not contain the proper
value, so the calculated system_sample_rate is wrong. In this case, we
simply return the cached rate from struct hdspm.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent 5cd5d7c4

sound/pci/rme9652/hdspm.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1988,6 +1988,13 @@ static int hdspm_get_system_sample_rate(struct hdspm *hdspm)
		period = hdspm_read(hdspm, HDSPM_RD_PLL_FREQ);
		rate = hdspm_calc_dds_value(hdspm, period);

		if (rate > 207000) {
		/* Unreasonable high sample rate as seen on PCI MADI cards.
		* Use the cached value instead.
		*/
		rate = hdspm->system_sample_rate;
		}

		return rate;
		}