From 848de598eef9603d6f2c174f90fded4e63ac5e23 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 18 Nov 2009 12:38:05 +0800 Subject: [PATCH] ALSA: intelhdmi - sticky infoframe MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 CC: David Härdeman Signed-off-by: Wu Fengguang Signed-off-by: Takashi Iwai --- sound/pci/hda/patch_intelhdmi.c | 38 ++++++++++++++++++++++----------- 1 file 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; } -- 2.39.3