ALSA: hda - Turn on PIN_OUT from hdmi playback prepare.

Turn on the pin widget's PIN_OUT bit from playback prepare. The pin is
enabled in open, but is disabled in hdmi_init_pin which is called during
system resume.  This causes a system suspend/resume during playback to
mute HDMI/DP. Enabling the pin in prepare instead of open allows calling
snd_pcm_prepare after a system resume to restore audio.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 0b4a1ea..641408d 100644 (file)
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -876,7 +876,6 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
        struct hdmi_spec_per_pin *per_pin;
        struct hdmi_eld *eld;
        struct hdmi_spec_per_cvt *per_cvt = NULL;
-       int pinctl;
 
        /* Validate hinfo */
        pin_idx = hinfo_to_pin_index(spec, hinfo);
@@ -912,11 +911,6 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
        snd_hda_codec_write(codec, per_pin->pin_nid, 0,
                            AC_VERB_SET_CONNECT_SEL,
                            mux_idx);
-       pinctl = snd_hda_codec_read(codec, per_pin->pin_nid, 0,
-                                   AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
-       snd_hda_codec_write(codec, per_pin->pin_nid, 0,
-                           AC_VERB_SET_PIN_WIDGET_CONTROL,
-                           pinctl | PIN_OUT);
        snd_hda_spdif_ctls_assign(codec, pin_idx, per_cvt->cvt_nid);
 
        /* Initially set the converter's capabilities */
@@ -1153,11 +1147,17 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
        struct hdmi_spec *spec = codec->spec;
        int pin_idx = hinfo_to_pin_index(spec, hinfo);
        hda_nid_t pin_nid = spec->pins[pin_idx].pin_nid;
+       int pinctl;
 
        hdmi_set_channel_count(codec, cvt_nid, substream->runtime->channels);
 
        hdmi_setup_audio_infoframe(codec, pin_idx, substream);
 
+       pinctl = snd_hda_codec_read(codec, pin_nid, 0,
+                                   AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
+       snd_hda_codec_write(codec, pin_nid, 0,
+                           AC_VERB_SET_PIN_WIDGET_CONTROL, pinctl | PIN_OUT);
+
        return hdmi_setup_stream(codec, cvt_nid, pin_nid, stream_tag, format);
 }