diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-15 11:22:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-15 11:22:00 -0700 |
| commit | 1b68c9596ce17a1e06918ed65fc3d19b92b04aab (patch) | |
| tree | d7588c281a92fb30604ddc23f88f748be028921d /sound/pci/hda/hda_eld.c | |
| parent | 5a4179460cb50d939a2ae713cf88fcbff75f2c1c (diff) | |
| parent | aaae5272118bcce90d11629f15bc01ea8e545e6d (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: sound/usb/format: silence uninitialized variable warnings
MAINTAINERS: Add Ian Lartey as comaintaner for Wolfson devices
MAINTAINERS: Make Wolfson entry also cover CODEC drivers
ASoC: Only tweak WM8994 chip configuration on devices up to rev D
ASoC: Optimise DSP performance for WM8994
ALSA: hda - Fix dynamic ADC change working again
ALSA: hda - Restrict PCM parameters per ELD information over HDMI
sound: oss: sh_dac_audio.c removed duplicated #include
Diffstat (limited to 'sound/pci/hda/hda_eld.c')
| -rw-r--r-- | sound/pci/hda/hda_eld.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c index d8da18a9e98..803b298f741 100644 --- a/sound/pci/hda/hda_eld.c +++ b/sound/pci/hda/hda_eld.c @@ -596,4 +596,53 @@ void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld) } EXPORT_SYMBOL_HDA(snd_hda_eld_proc_free); +/* update PCM info based on ELD */ +void hdmi_eld_update_pcm_info(struct hdmi_eld *eld, struct hda_pcm_stream *pcm, + struct hda_pcm_stream *codec_pars) +{ + int i; + + pcm->rates = 0; + pcm->formats = 0; + pcm->maxbps = 0; + pcm->channels_min = -1; + pcm->channels_max = 0; + for (i = 0; i < eld->sad_count; i++) { + struct cea_sad *a = &eld->sad[i]; + pcm->rates |= a->rates; + if (a->channels < pcm->channels_min) + pcm->channels_min = a->channels; + 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) + pcm->maxbps = 20; + } + if (a->sample_bits & AC_SUPPCM_BITS_24) { + pcm->formats |= SNDRV_PCM_FMTBIT_S32_LE; + if (pcm->maxbps < 24) + pcm->maxbps = 24; + } + } + } + + if (!codec_pars) + return; + + /* restrict the parameters by the values the codec provides */ + pcm->rates &= codec_pars->rates; + pcm->formats &= codec_pars->formats; + pcm->channels_min = max(pcm->channels_min, codec_pars->channels_min); + pcm->channels_max = min(pcm->channels_max, codec_pars->channels_max); + pcm->maxbps = min(pcm->maxbps, codec_pars->maxbps); +} +EXPORT_SYMBOL_HDA(hdmi_eld_update_pcm_info); + #endif /* CONFIG_PROC_FS */ |