From: Andreas Schwab Date: Fri, 1 Sep 2006 15:15:36 +0000 (+0200) Subject: [ALSA] [PPC,SOUND] Fix audio gpio state detection X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2fd53a7e9b1392f9cc3002a24f3c13b2796e70c3;p=openwrt%2Fstaging%2Fblogic.git [ALSA] [PPC,SOUND] Fix audio gpio state detection When booting with line out or headphone plugged, you won't hear anything. The problem is that after reset all channels are muted, but the actual value of the gpio port doesn't exactly match the active_val settings as expected by check_audio_gpio. For example, the line_mute port is set to 7, but check_audio_gpio would expect 0xd or 0xf, thus its return value indicates that it is not active, even though it is. AFAICS only looking at the low bit is enough to determine whether the port is active. Signed-off-by: Andreas Schwab Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- diff --git a/sound/ppc/tumbler.c b/sound/ppc/tumbler.c index 6ae2d5b9aa4a..cdff53e4a17e 100644 --- a/sound/ppc/tumbler.c +++ b/sound/ppc/tumbler.c @@ -190,7 +190,7 @@ static int check_audio_gpio(struct pmac_gpio *gp) ret = do_gpio_read(gp); - return (ret & 0xd) == (gp->active_val & 0xd); + return (ret & 0x1) == (gp->active_val & 0x1); } static int read_audio_gpio(struct pmac_gpio *gp) @@ -198,7 +198,8 @@ static int read_audio_gpio(struct pmac_gpio *gp) int ret; if (! gp->addr) return 0; - ret = ((do_gpio_read(gp) & 0x02) !=0); + ret = do_gpio_read(gp); + ret = (ret & 0x02) !=0; return ret == gp->active_state; }