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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-11-18 12:38:05 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-18 07:45:42 +0100 |
| commit | 848de598eef9603d6f2c174f90fded4e63ac5e23 (patch) | |
| tree | 9272ba0cc9dcf0c0e09286052abe29730148b503 /sound | |
| parent | 978be6d711be237e0344eca21c3922ae88a240bc (diff) | |
| download | kernel-crypto-848de598eef9603d6f2c174f90fded4e63ac5e23.tar.gz kernel-crypto-848de598eef9603d6f2c174f90fded4e63ac5e23.tar.xz kernel-crypto-848de598eef9603d6f2c174f90fded4e63ac5e23.zip | |
ALSA: intelhdmi - sticky infoframe
Remember the active infoframe, so as to avoid stop/restart infoframe
transmission when switching between audio clips of the same format.
Proposed by Shang and David.
CC: Shane W <shane-alsa@csy.ca>
CC: David Härdeman <david@hardeman.nu>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/patch_intelhdmi.c | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c index d68dba9ac11..abb056fde67 100644 --- a/sound/pci/hda/patch_intelhdmi.c +++ b/sound/pci/hda/patch_intelhdmi.c @@ -646,6 +646,27 @@ static void hdmi_setup_channel_mapping(struct hda_codec *codec, hda_nid_t nid, hdmi_debug_channel_mapping(codec, nid); } +static bool hdmi_infoframe_uptodate(struct hda_codec *codec, hda_nid_t pin_nid, + struct hdmi_audio_infoframe *ai) +{ + u8 *bytes = (u8 *)ai; + u8 val; + int i; + + if (snd_hda_codec_read(codec, pin_nid, 0, AC_VERB_GET_HDMI_DIP_XMIT, 0) + != AC_DIPXMIT_BEST) + return false; + + hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0); + for (i = 0; i < sizeof(*ai); i++) { + val = snd_hda_codec_read(codec, pin_nid, 0, + AC_VERB_GET_HDMI_DIP_DATA, 0); + if (val != bytes[i]) + return false; + } + + return true; +} static void hdmi_setup_audio_infoframe(struct hda_codec *codec, hda_nid_t nid, struct snd_pcm_substream *substream) @@ -670,8 +691,11 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, hda_nid_t nid, continue; pin_nid = spec->pin[i]; - hdmi_fill_audio_infoframe(codec, pin_nid, &ai); - hdmi_start_infoframe_trans(codec, pin_nid); + if (!hdmi_infoframe_uptodate(codec, pin_nid, &ai)) { + hdmi_stop_infoframe_trans(codec, pin_nid); + hdmi_fill_audio_infoframe(codec, pin_nid, &ai); + hdmi_start_infoframe_trans(codec, pin_nid); + } } } @@ -767,16 +791,6 @@ static int intel_hdmi_playback_pcm_cleanup(struct hda_pcm_stream *hinfo, struct hda_codec *codec, struct snd_pcm_substream *substream) { - struct intel_hdmi_spec *spec = codec->spec; - int i; - - for (i = 0; i < spec->num_pins; i++) { - if (spec->pin_cvt[i] != hinfo->nid) - continue; - - hdmi_stop_infoframe_trans(codec, spec->pin[i]); - } - snd_hda_codec_cleanup_stream(codec, hinfo->nid); return 0; } |