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authorTakashi Iwai <tiwai@suse.de>2010-08-13 08:45:23 +0200
committerTakashi Iwai <tiwai@suse.de>2010-08-13 08:45:23 +0200
commitbbbe33900d1f3c4402148ccb85234a741a6606a3 (patch)
tree294143653bfb5a045dea0396b8fee00ed7164b6e
parent8a345a042ae75097fd493633633382644257cfc3 (diff)
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ALSA: hda - Restrict PCM parameters per ELD information over HDMI
When a device is plugged over HDMI, it passes some information in ELD including the supported PCM parameters like formats, rates, channels. This patch adds the check to PCM open callback of HDMI streams so that only valid parameters the device supports are used. When no device is plugged, the parameters the codec supports are used; it's mostly all parameters the hardware can work. This is for apps that are started before device plugging and do probing (e.g. a sound daemon), so that at least, probing would work even before the device plugging. Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/pci/hda/hda_eld.c49
-rw-r--r--sound/pci/hda/hda_local.h2
-rw-r--r--sound/pci/hda/patch_hdmi.c42
-rw-r--r--sound/pci/hda/patch_intelhdmi.c1
-rw-r--r--sound/pci/hda/patch_nvhdmi.c4
5 files changed, 95 insertions, 3 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 */
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index 7a97f126f6f..28ab4aead48 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -604,6 +604,8 @@ struct hdmi_eld {
int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid);
int snd_hdmi_get_eld(struct hdmi_eld *, struct hda_codec *, hda_nid_t);
void snd_hdmi_show_eld(struct hdmi_eld *eld);
+void hdmi_eld_update_pcm_info(struct hdmi_eld *eld, struct hda_pcm_stream *pcm,
+ struct hda_pcm_stream *codec_pars);
#ifdef CONFIG_PROC_FS
int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld,
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 522e0748ee9..2bc0f07cf33 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -46,6 +46,7 @@ struct hdmi_spec {
* export one pcm per pipe
*/
struct hda_pcm pcm_rec[MAX_HDMI_CVTS];
+ struct hda_pcm_stream codec_pcm_pars[MAX_HDMI_CVTS];
/*
* nvhdmi specific
@@ -766,6 +767,47 @@ static int hdmi_setup_stream(struct hda_codec *codec, hda_nid_t nid,
}
/*
+ * HDA PCM callbacks
+ */
+static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
+ struct hda_codec *codec,
+ struct snd_pcm_substream *substream)
+{
+ struct hdmi_spec *spec = codec->spec;
+ struct hdmi_eld *eld;
+ struct hda_pcm_stream *codec_pars;
+ unsigned int idx;
+
+ for (idx = 0; idx < spec->num_cvts; idx++)
+ if (hinfo->nid == spec->cvt[idx])
+ break;
+ if (snd_BUG_ON(idx >= spec->num_cvts) ||
+ snd_BUG_ON(idx >= spec->num_pins))
+ return -EINVAL;
+
+ /* save the PCM info the codec provides */
+ codec_pars = &spec->codec_pcm_pars[idx];
+ if (!codec_pars->rates)
+ *codec_pars = *hinfo;
+
+ eld = &spec->sink_eld[idx];
+ if (eld->sad_count > 0) {
+ hdmi_eld_update_pcm_info(eld, hinfo, codec_pars);
+ if (hinfo->channels_min > hinfo->channels_max ||
+ !hinfo->rates || !hinfo->formats)
+ return -ENODEV;
+ } else {
+ /* fallback to the codec default */
+ hinfo->channels_min = codec_pars->channels_min;
+ hinfo->channels_max = codec_pars->channels_max;
+ hinfo->rates = codec_pars->rates;
+ hinfo->formats = codec_pars->formats;
+ hinfo->maxbps = codec_pars->maxbps;
+ }
+ return 0;
+}
+
+/*
* HDA/HDMI auto parsing
*/
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c
index 5972d5e7d01..d382d3c81c0 100644
--- a/sound/pci/hda/patch_intelhdmi.c
+++ b/sound/pci/hda/patch_intelhdmi.c
@@ -80,6 +80,7 @@ static struct hda_pcm_stream intel_hdmi_pcm_playback = {
.substreams = 1,
.channels_min = 2,
.ops = {
+ .open = hdmi_pcm_open,
.prepare = intel_hdmi_playback_pcm_prepare,
.cleanup = intel_hdmi_playback_pcm_cleanup,
},
diff --git a/sound/pci/hda/patch_nvhdmi.c b/sound/pci/hda/patch_nvhdmi.c
index 77e2b4028b9..f636870dc71 100644
--- a/sound/pci/hda/patch_nvhdmi.c
+++ b/sound/pci/hda/patch_nvhdmi.c
@@ -347,10 +347,8 @@ static int nvhdmi_dig_playback_pcm_prepare_2ch(struct hda_pcm_stream *hinfo,
static struct hda_pcm_stream nvhdmi_pcm_digital_playback_8ch_89 = {
.substreams = 1,
.channels_min = 2,
- .rates = SUPPORTED_RATES,
- .maxbps = SUPPORTED_MAXBPS,
- .formats = SUPPORTED_FORMATS,
.ops = {
+ .open = hdmi_pcm_open,
.prepare = nvhdmi_dig_playback_pcm_prepare_8ch_89,
.cleanup = nvhdmi_playback_pcm_cleanup,
},