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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2011-09-30 16:35:41 -0500 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-10-03 15:48:12 +0200 |
| commit | 14bc52b8feaae6cbc88934399f418125ac176399 (patch) | |
| tree | e43a68246b931ab6001f9977886918145448b19d /sound/pci/hda/hda_local.h | |
| parent | ef940b0403d4ae133c548b01fe64c74fa8a2f0b1 (diff) | |
| download | linux-stable-14bc52b8feaae6cbc88934399f418125ac176399.tar.gz linux-stable-14bc52b8feaae6cbc88934399f418125ac176399.tar.bz2 linux-stable-14bc52b8feaae6cbc88934399f418125ac176399.zip | |
ALSA: hda/hdmi: expose ELD control
Applications may want to read ELD information to
understand what codecs are supported on the HDMI
receiver and handle the a-v delay for better lip-sync.
ELD information is exposed in a device-specific
IFACE_PCM kcontrol. Tested both with amixer and
PulseAudio; with a corresponding patch passthrough modes
are enabled automagically.
ELD control size is set to zero in case of errors or
wrong configurations. No notifications are implemented
for now, it is expected that jack detection is used to
reconfigure the audio outputs.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_local.h')
| -rw-r--r-- | sound/pci/hda/hda_local.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index aaefa7c81e68..04d730fffee2 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -621,6 +621,7 @@ struct cea_sad { }; #define ELD_FIXED_BYTES 20 +#define ELD_MAX_SIZE 256 #define ELD_MAX_MNL 16 #define ELD_MAX_SAD 16 @@ -645,6 +646,7 @@ struct hdmi_eld { int spk_alloc; int sad_count; struct cea_sad sad[ELD_MAX_SAD]; + char eld_buffer[ELD_MAX_SIZE]; #ifdef CONFIG_PROC_FS struct snd_info_entry *proc_entry; #endif |