diff options
Diffstat (limited to 'sound/pci/hda/hda_beep.c')
| -rw-r--r-- | sound/pci/hda/hda_beep.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/sound/pci/hda/hda_beep.c b/sound/pci/hda/hda_beep.c index 29272f2e95a..3f51a981e60 100644 --- a/sound/pci/hda/hda_beep.c +++ b/sound/pci/hda/hda_beep.c @@ -24,6 +24,7 @@ #include <linux/workqueue.h> #include <sound/core.h> #include "hda_beep.h" +#include "hda_local.h" enum { DIGBEEP_HZ_STEP = 46875, /* 46.875 Hz */ @@ -50,19 +51,22 @@ static void snd_hda_generate_beep(struct work_struct *work) * The tone frequency of beep generator on IDT/STAC codecs is * defined from the 8bit tone parameter, in Hz, * freq = 48000 * (257 - tone) / 1024 - * that is from 12kHz to 93.75kHz in step of 46.875 hz + * that is from 12kHz to 93.75Hz in steps of 46.875 Hz */ static int beep_linear_tone(struct hda_beep *beep, int hz) { + if (hz <= 0) + return 0; hz *= 1000; /* fixed point */ - hz = hz - DIGBEEP_HZ_MIN; + hz = hz - DIGBEEP_HZ_MIN + + DIGBEEP_HZ_STEP / 2; /* round to nearest step */ if (hz < 0) hz = 0; /* turn off PC beep*/ else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN)) - hz = 0xff; + hz = 1; /* max frequency */ else { hz /= DIGBEEP_HZ_STEP; - hz++; + hz = 255 - hz; } return hz; } @@ -115,6 +119,9 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid) struct hda_beep *beep; int err; + if (!snd_hda_get_bool_hint(codec, "beep")) + return 0; /* disabled explicitly */ + beep = kzalloc(sizeof(*beep), GFP_KERNEL); if (beep == NULL) return -ENOMEM; |