From 3ac50d16960dc16022b0c6ba35ecfb57e5d2d01b Mon Sep 17 00:00:00 2001 From: Wang Xingchao Date: Wed, 5 Sep 2012 07:35:14 +0800 Subject: [PATCH RFC 2/3] ALSA: HDMI - Enable HBR feature on Intel chips HDMI channel remapping apparently effects HBR packets on Intel's chips. For compressed non-PCM audio, use "straight-through" channel mapping. For uncompressed multi-channel pcm audio, use normal channel mapping. Signed-off-by: Wang Xingchao --- sound/pci/hda/patch_hdmi.c | 36 ++++++++++++++++++++++++++++++++---- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 6ac21d4..a87f8b2 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -34,6 +34,7 @@ #include #include #include +#include #include "hda_codec.h" #include "hda_local.h" #include "hda_jack.h" @@ -60,6 +61,7 @@ struct hdmi_spec_per_cvt { u32 rates; u64 formats; unsigned int maxbps; + bool non_pcm; }; struct hdmi_spec_per_pin { @@ -548,13 +550,17 @@ static void hdmi_debug_channel_mapping(struct hda_codec *codec, static void hdmi_setup_channel_mapping(struct hda_codec *codec, hda_nid_t pin_nid, + hda_nid_t cvt_nid, + bool non_pcm, int ca) { int i; int err; int order; + int non_pcm_mapping[8]; order = get_channel_allocation_order(ca); + if (hdmi_channel_mapping[ca][1] == 0) { for (i = 0; i < channel_allocations[order].channels; i++) hdmi_channel_mapping[ca][i] = i | (i << 4); @@ -562,10 +568,17 @@ static void hdmi_setup_channel_mapping(struct hda_codec *codec, hdmi_channel_mapping[ca][i] = 0xf | (i << 4); } + if (non_pcm) { + for (i = 0; i < channel_allocations[order].channels; i++) + non_pcm_mapping[i] = i | (i << 4); + for (; i < 8; i++) + non_pcm_mapping[i] = 0xf | (i << 4); + } + for (i = 0; i < 8; i++) { err = snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_CHAN_SLOT, - hdmi_channel_mapping[ca][i]); + non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i]); if (err) { snd_printdd(KERN_NOTICE "HDMI: channel mapping failed\n"); @@ -699,15 +712,27 @@ static bool hdmi_infoframe_uptodate(struct hda_codec *codec, hda_nid_t pin_nid, } static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx, - struct snd_pcm_substream *substream) + hda_nid_t cvt_nid, struct snd_pcm_substream *substream) { struct hdmi_spec *spec = codec->spec; struct hdmi_spec_per_pin *per_pin = &spec->pins[pin_idx]; + struct hdmi_spec_per_cvt *per_cvt; + struct hda_spdif_out *spdif; hda_nid_t pin_nid = per_pin->pin_nid; int channels = substream->runtime->channels; struct hdmi_eld *eld; int ca; + int cvt_idx; union audio_infoframe ai; + bool non_pcm = false; + + cvt_idx = cvt_nid_to_cvt_index(spec, cvt_nid); + per_cvt = &spec->cvts[cvt_idx]; + + mutex_lock(&codec->spdif_mutex); + spdif = snd_hda_spdif_out_of_nid(codec, cvt_nid); + non_pcm = !!(spdif->status & IEC958_AES0_NONAUDIO); + mutex_unlock(&codec->spdif_mutex); eld = &spec->pins[pin_idx].sink_eld; if (!eld->monitor_present) @@ -750,12 +775,14 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx, "pin=%d channels=%d\n", pin_nid, channels); - hdmi_setup_channel_mapping(codec, pin_nid, ca); + hdmi_setup_channel_mapping(codec, pin_nid, cvt_nid, non_pcm, ca); hdmi_stop_infoframe_trans(codec, pin_nid); hdmi_fill_audio_infoframe(codec, pin_nid, ai.bytes, sizeof(ai)); hdmi_start_infoframe_trans(codec, pin_nid); } + + per_cvt->non_pcm = non_pcm; } @@ -1077,6 +1104,7 @@ static int hdmi_add_cvt(struct hda_codec *codec, hda_nid_t cvt_nid) per_cvt->cvt_nid = cvt_nid; per_cvt->channels_min = 2; + per_cvt->non_pcm = false; if (chans <= 16) per_cvt->channels_max = chans; @@ -1164,7 +1192,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, hdmi_set_channel_count(codec, cvt_nid, substream->runtime->channels); - hdmi_setup_audio_infoframe(codec, pin_idx, substream); + hdmi_setup_audio_infoframe(codec, pin_idx, cvt_nid, substream); pinctl = snd_hda_codec_read(codec, pin_nid, 0, AC_VERB_GET_PIN_WIDGET_CONTROL, 0); -- 1.7.9.5