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authorSubhransu S. Prusty <subhransu.s.prusty@intel.com>2016-04-04 19:23:54 +0530
committerTakashi Iwai <tiwai@suse.de>2016-04-04 16:04:24 +0200
commit44fde3b89ba1e154b3cec7d711703fff53852983 (patch)
tree5798bfdde03fa87a7b51a1ef10cfe3ea8415040b /sound
parenta99e31512aa435e8391ba5f5e64abeac9c5f2f32 (diff)
ALSA: hda - Update chmap tlv to report sink's capability
The existing TLV callback implementation copies all of the cea_channel_speaker_allocation map table to the TLV container irrespective of what is reported by sink. This is of little use to the userspace application. With this patch, it parses the spk_alloc block as queried from the ELD, and copies only the corresponding mapping channel allocation entries from the cea channel speaker allocation table. Thus the user can parse the TLV container to identify sink's capability and set the channel map accordingly. It shouldn't impact the behavior in AMD chipset, as this makes use of already parsed spk alloc block to calculate the channel map. Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/hda/hdmi_chmap.c44
-rw-r--r--sound/pci/hda/patch_hdmi.c13
2 files changed, 53 insertions, 4 deletions
diff --git a/sound/hda/hdmi_chmap.c b/sound/hda/hdmi_chmap.c
index d7ec86263828..c6c75e7e0981 100644
--- a/sound/hda/hdmi_chmap.c
+++ b/sound/hda/hdmi_chmap.c
@@ -625,13 +625,30 @@ static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap,
WARN_ON(count != channels);
}
+static int spk_mask_from_spk_alloc(int spk_alloc)
+{
+ int i;
+ int spk_mask = eld_speaker_allocation_bits[0];
+
+ for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
+ if (spk_alloc & (1 << i))
+ spk_mask |= eld_speaker_allocation_bits[i];
+ }
+
+ return spk_mask;
+}
+
static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
unsigned int size, unsigned int __user *tlv)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct hdac_chmap *chmap = info->private_data;
+ int pcm_idx = kcontrol->private_value;
unsigned int __user *dst;
int chs, count = 0;
+ unsigned long max_chs;
+ int type;
+ int spk_alloc, spk_mask;
if (size < 8)
return -ENOMEM;
@@ -639,40 +656,59 @@ static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
return -EFAULT;
size -= 8;
dst = tlv + 2;
- for (chs = 2; chs <= chmap->channels_max; chs++) {
+
+ spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx);
+ spk_mask = spk_mask_from_spk_alloc(spk_alloc);
+
+ max_chs = hweight_long(spk_mask);
+
+ for (chs = 2; chs <= max_chs; chs++) {
int i;
struct hdac_cea_channel_speaker_allocation *cap;
cap = channel_allocations;
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) {
int chs_bytes = chs * 4;
- int type = chmap->ops.chmap_cea_alloc_validate_get_type(
- chmap, cap, chs);
unsigned int tlv_chmap[8];
- if (type < 0)
+ if (cap->channels != chs)
+ continue;
+
+ if (!(cap->spk_mask == (spk_mask & cap->spk_mask)))
continue;
+
+ type = chmap->ops.chmap_cea_alloc_validate_get_type(
+ chmap, cap, chs);
+ if (type < 0)
+ return -ENODEV;
if (size < 8)
return -ENOMEM;
+
if (put_user(type, dst) ||
put_user(chs_bytes, dst + 1))
return -EFAULT;
+
dst += 2;
size -= 8;
count += 8;
+
if (size < chs_bytes)
return -ENOMEM;
+
size -= chs_bytes;
count += chs_bytes;
chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap,
tlv_chmap, chs);
+
if (copy_to_user(dst, tlv_chmap, chs_bytes))
return -EFAULT;
dst += chs;
}
}
+
if (put_user(count, tlv + 1))
return -EFAULT;
+
return 0;
}
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 4833c7bdd1e8..9452384d2000 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1837,6 +1837,18 @@ static const struct hda_pcm_ops generic_ops = {
.cleanup = generic_hdmi_playback_pcm_cleanup,
};
+static int hdmi_get_spk_alloc(struct hdac_device *hdac, int pcm_idx)
+{
+ struct hda_codec *codec = container_of(hdac, struct hda_codec, core);
+ struct hdmi_spec *spec = codec->spec;
+ struct hdmi_spec_per_pin *per_pin = pcm_idx_to_pin(spec, pcm_idx);
+
+ if (!per_pin)
+ return 0;
+
+ return per_pin->sink_eld.info.spk_alloc;
+}
+
static void hdmi_get_chmap(struct hdac_device *hdac, int pcm_idx,
unsigned char *chmap)
{
@@ -2165,6 +2177,7 @@ static int alloc_generic_hdmi(struct hda_codec *codec)
spec->chmap.ops.get_chmap = hdmi_get_chmap;
spec->chmap.ops.set_chmap = hdmi_set_chmap;
spec->chmap.ops.is_pcm_attached = is_hdmi_pcm_attached;
+ spec->chmap.ops.get_spk_alloc = hdmi_get_spk_alloc,
codec->spec = spec;
hdmi_array_init(spec, 4);