[alsa-devel] [PATCH] ALSA: hda - Do not set GPIOs for speakers on IDT if there are no speakers

David Henningsson david.henningsson at canonical.com
Wed Aug 22 16:10:43 CEST 2012

This fixes an issue with a machine where there were no speakers,
but GPIO0 had to be data=1 for the headphone to be functioning.

I'm not sure if we need a more advanced patch to solve all possible cases,
but if so, this patch would still provide a minor optimisation.

BugLink: https://bugs.launchpad.net/bugs/1040077
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
 sound/pci/hda/patch_sigmatel.c |    3 +++
 1 file changed, 3 insertions(+)

The alsa-info for this machine can not be released yet, sorry.

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index ea5775a..3edd73c 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -4543,6 +4543,9 @@ static void stac92xx_line_out_detect(struct hda_codec *codec,
 	struct auto_pin_cfg *cfg = &spec->autocfg;
 	int i;
+	if (cfg->speaker_outs == 0)
+		return;
 	for (i = 0; i < cfg->line_outs; i++) {
 		if (presence)

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