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authorAnssi Hannula <anssi.hannula@iki.fi>2010-12-07 20:56:19 +0200
committerTakashi Iwai <tiwai@suse.de>2010-12-07 20:13:22 +0100
commit3dc86429032910bdf762adeb2969112bb303924c (patch)
treec53f59b064177380d000acfa4b99a28069b27673 /sound
parent4b0dbdb17f846a8887e5f7fbeea2deb0703236bd (diff)
downloadlinux-3dc86429032910bdf762adeb2969112bb303924c.tar.bz2
ALSA: hda - Always allow basic audio irrespective of ELD info
Commit bbbe33900d1f3c added functionality to restrict PCM parameters based on ELD info (derived from EDID data) of the audio sink. However, according to CEA-861-D no SAD is needed for basic audio (32/44.1/48kHz stereo 16-bit audio), which is instead indicated with a basic audio flag in the CEA EDID Extension. The flag is not present in ELD. However, as all audio capable sinks are required to support basic audio, we can assume it to be always available. Fix allowed audio formats with sinks that have SADs (Short Audio Descriptors) which do not completely overlap with the basic audio formats (there are no reports of affected devices so far) by always assuming that basic audio is supported. Reported-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi> Cc: stable@kernel.org Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/hda_eld.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c
index 47ef8aa4a844..009031fae2ba 100644
--- a/sound/pci/hda/hda_eld.c
+++ b/sound/pci/hda/hda_eld.c
@@ -598,21 +598,19 @@ void hdmi_eld_update_pcm_info(struct hdmi_eld *eld, struct hda_pcm_stream *pcm,
{
int i;
- pcm->rates = 0;
- pcm->formats = 0;
- pcm->maxbps = 0;
- pcm->channels_max = 0;
+ /* assume basic audio support (the basic audio flag is not in ELD;
+ * however, all audio capable sinks are required to support basic
+ * audio) */
+ pcm->rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000;
+ pcm->formats = SNDRV_PCM_FMTBIT_S16_LE;
+ pcm->maxbps = 16;
+ pcm->channels_max = 2;
for (i = 0; i < eld->sad_count; i++) {
struct cea_sad *a = &eld->sad[i];
pcm->rates |= a->rates;
if (a->channels > pcm->channels_max)
pcm->channels_max = a->channels;
if (a->format == AUDIO_CODING_TYPE_LPCM) {
- if (a->sample_bits & AC_SUPPCM_BITS_16) {
- pcm->formats |= SNDRV_PCM_FMTBIT_S16_LE;
- if (pcm->maxbps < 16)
- pcm->maxbps = 16;
- }
if (a->sample_bits & AC_SUPPCM_BITS_20) {
pcm->formats |= SNDRV_PCM_FMTBIT_S32_LE;
if (pcm->maxbps < 20)