From 9fc7c862e78ba8bec142935673227f2463aa05a5 Mon Sep 17 00:00:00 2001 From: "Subhransu S. Prusty" Date: Thu, 14 Apr 2016 10:07:29 +0530 Subject: [PATCH] ALSA: hda - add helper to get channels from cap bits This helper is copied from legacy hda driver. Signed-off-by: Subhransu S. Prusty Signed-off-by: Vinod Koul Acked-by: Takashi Iwai Signed-off-by: Mark Brown --- sound/hda/local.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/sound/hda/local.h b/sound/hda/local.h index d692f41..0d5bb15 100644 --- a/sound/hda/local.h +++ b/sound/hda/local.h @@ -16,6 +16,16 @@ static inline int get_wcaps_type(unsigned int wcaps) return (wcaps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT; } +static inline unsigned int get_wcaps_channels(u32 wcaps) +{ + unsigned int chans; + + chans = (wcaps & AC_WCAP_CHAN_CNT_EXT) >> 13; + chans = (chans + 1) * 2; + + return chans; +} + extern const struct attribute_group *hdac_dev_attr_groups[]; int hda_widget_sysfs_init(struct hdac_device *codec); void hda_widget_sysfs_exit(struct hdac_device *codec); -- 2.7.4