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| author | Adrian Knoth <adi@drcomp.erfurt.thur.de> | 2012-05-30 14:23:18 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-05-31 10:26:12 +0200 |
| commit | a97bda7d29d02a2e9c6609d0947b15e55f5200e5 (patch) | |
| tree | 62fd74b55d53d2074bc1da1abe3d69b58d0ffee6 | |
| parent | 5cd5d7c44990658df6ab49f6253c39617c53b03d (diff) | |
| download | linux-3.10-a97bda7d29d02a2e9c6609d0947b15e55f5200e5.tar.gz linux-3.10-a97bda7d29d02a2e9c6609d0947b15e55f5200e5.tar.bz2 linux-3.10-a97bda7d29d02a2e9c6609d0947b15e55f5200e5.zip | |
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>
| -rw-r--r-- | sound/pci/rme9652/hdspm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c index 0a5027b9471..b8ac8710f47 100644 --- a/sound/pci/rme9652/hdspm.c +++ b/sound/pci/rme9652/hdspm.c @@ -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; } |