From a97bda7d29d02a2e9c6609d0947b15e55f5200e5 Mon Sep 17 00:00:00 2001 From: Adrian Knoth Date: Wed, 30 May 2012 14:23:18 +0200 Subject: [PATCH] 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 Signed-off-by: Takashi Iwai --- sound/pci/rme9652/hdspm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c index 0a5027b94714..b8ac8710f47f 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; } -- 2.39.2