diff options
| author | Anssi Hannula <anssi.hannula@iki.fi> | 2013-10-24 21:10:38 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-10-24 22:57:32 +0200 |
| commit | 84d69e790f48ff2e8472a8cf602243e43683eaf0 (patch) | |
| tree | 0596400b25c81148cf416c84d840d23b8cec1bcc | |
| parent | 461cf6b39dded3ddb15a2300a534aba039870e5f (diff) | |
| download | linux-84d69e790f48ff2e8472a8cf602243e43683eaf0.tar.bz2 | |
ALSA: hda - hdmi: Disable ramp-up/down for non-PCM on AMD codecs
Recent AMD HDMI codecs (revision ID 3 and later, 0x100300 as reported by
procfs codec#0) have a configurable ramp-up/down functionality.
The documentation ( http://www.x.org/docs/AMD/AMD_HDA_verbs_v2.pdf )
specifies that 180 ("180/256 =~ 0.7") is recommended for PCM and 0 for
non-PCM.
Apply the recommended values according to provided S/PDIF AES0 settings
since ramp-up/down does not make sense for non-PCM.
v2: adapted to hdmi_ops infrastructure
* More note from Anssi:
actually, re-reading mails reveals that Olivier didn't find the
expected difference with this setting, except for "maybe slightly
slower startup with AES0=6" (i.e. value 0, which is unexpected).
So maybe
a) it makes too unnoticiable a difference, or
b) only affects certain hardware (card and/or sink), or
c) ramp-up/down is only triggered with the MUTE bit of
ATI_VERB_SET_MULTICHANNEL_xx which is also rev3+ specific,
but is not presently used by the driver,
or something else.
So there's a significant chance setting ramp rate is useless for us ATM,
but probably does not do actual harm either.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Tested-by: Olivier Langlois <olivier@trillion01.com> # v1
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/hda/patch_hdmi.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index f6a97607e522..7bd89bf62559 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2818,6 +2818,10 @@ static int patch_nvhdmi_8ch_7x(struct hda_codec *codec) #define ATI_VERB_GET_MULTICHANNEL_7 0xf88 #define ATI_VERB_GET_MULTICHANNEL_MODE 0xf89 +/* AMD specific HDA cvt verbs */ +#define ATI_VERB_SET_RAMP_RATE 0x770 +#define ATI_VERB_GET_RAMP_RATE 0xf70 + #define ATI_OUT_ENABLE 0x1 #define ATI_MULTICHANNEL_MODE_PAIRED 0 @@ -3049,6 +3053,23 @@ static int atihdmi_pin_hbr_setup(struct hda_codec *codec, hda_nid_t pin_nid, return 0; } +static int atihdmi_setup_stream(struct hda_codec *codec, hda_nid_t cvt_nid, + hda_nid_t pin_nid, u32 stream_tag, int format) +{ + + if (is_amdhdmi_rev3_or_later(codec)) { + int ramp_rate = 180; /* default as per AMD spec */ + /* disable ramp-up/down for non-pcm as per AMD spec */ + if (format & AC_FMT_TYPE_NON_PCM) + ramp_rate = 0; + + snd_hda_codec_write(codec, cvt_nid, 0, ATI_VERB_SET_RAMP_RATE, ramp_rate); + } + + return hdmi_setup_stream(codec, cvt_nid, pin_nid, stream_tag, format); +} + + static int atihdmi_init(struct hda_codec *codec) { struct hdmi_spec *spec = codec->spec; @@ -3095,6 +3116,7 @@ static int patch_atihdmi(struct hda_codec *codec) spec->ops.pin_set_slot_channel = atihdmi_pin_set_slot_channel; spec->ops.pin_setup_infoframe = atihdmi_pin_setup_infoframe; spec->ops.pin_hbr_setup = atihdmi_pin_hbr_setup; + spec->ops.setup_stream = atihdmi_setup_stream; if (!has_amd_full_remap_support(codec)) { /* override to ATI/AMD-specific versions with pairwise mapping */ |