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ALSA: intelhdmi - add channel mapping for typical configurations 

IbexPeak is the first Intel HDMI audio codec to support channel mapping.

Currently the outstanding problem is, the HDMI channel order do not
agree with that of ALSA.  This patch presents workaround for some
typical use cases. It gives priority to the typical ALSA surround
configurations, and defines channel mapping for them.

We may need better kernel+userspace interactive channel mapping scheme.
For example, in current scheme if user plays with the surround50 device,
the kernel is unaware of this and will still select the surround41
channel allocation and channel mapping..

Thanks to Marcin for offering good tips!

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wu Fengguang 2009-12-11 12:28:36 +08:00 коммит произвёл Takashi Iwai
Родитель 1ffc69a6e8
Коммит b14224bb74
1 изменённых файлов: 67 добавлений и 22 удалений
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89
sound/pci/hda/patch_intelhdmi.c
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@ -145,6 +145,42 @@ struct cea_channel_speaker_allocation {
int spk_mask;
};
/*
* ALSA sequence is:
*
* surround40 surround41 surround50 surround51 surround71
* ch0 front left = = = =
* ch1 front right = = = =
* ch2 rear left = = = =
* ch3 rear right = = = =
* ch4 LFE center center center
* ch5 LFE LFE
* ch6 side left
* ch7 side right
*
* surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR}
*/
static int hdmi_channel_mapping[0x32][8] = {
/* stereo */
[0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
/* 2.1 */
[0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
/* Dolby Surround */
[0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 },
/* surround40 */
[0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 },
/* 4ch */
[0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 },
/* surround41 */
[0x09] = { 0x00, 0x11, 0x24, 0x34, 0x43, 0xf2, 0xf6, 0xf7 },
/* surround50 */
[0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 },
/* surround51 */
[0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 },
/* 7.1 */
[0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 },
};
/*
* This is an ordered list!
*
@ -152,32 +188,36 @@ struct cea_channel_speaker_allocation {
* hdmi_setup_channel_allocation().
*/
static struct cea_channel_speaker_allocation channel_allocations[] = {
/* channel: 8 7 6 5 4 3 2 1 */
/* channel: 7 6 5 4 3 2 1 0 */
{ .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } },
/* 2.1 */
{ .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } },
/* Dolby Surround */
{ .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } },
/* surround40 */
{ .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } },
/* surround41 */
{ .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } },
/* surround50 */
{ .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } },
/* surround51 */
{ .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } },
/* 6.1 */
{ .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } },
/* surround71 */
{ .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } },
{ .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } },
{ .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } },
{ .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } },
{ .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } },
{ .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } },
{ .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } },
{ .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } },
{ .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } },
/* 5.1 */
{ .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } },
{ .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } },
{ .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } },
{ .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } },
/* 6.1 */
{ .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } },
{ .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } },
{ .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } },
{ .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } },
/* 7.1 */
{ .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } },
{ .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } },
{ .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } },
{ .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } },
@ -210,7 +250,6 @@ static struct cea_channel_speaker_allocation channel_allocations[] = {
{ .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } },
};
/*
* HDA/HDMI auto parsing
*/
@ -625,19 +664,25 @@ static void hdmi_setup_channel_mapping(struct hda_codec *codec,
struct hdmi_audio_infoframe *ai)
{
int i;
int ca = ai->CA;
int err;
if (!ai->CA)
return;
if (hdmi_channel_mapping[ca][1] == 0) {
for (i = 0; i < channel_allocations[ca].channels; i++)
hdmi_channel_mapping[ca][i] = i | (i << 4);
for (; i < 8; i++)
hdmi_channel_mapping[ca][i] = 0xf | (i << 4);
}
/*
* TODO: adjust channel mapping if necessary
* ALSA sequence is front/surr/clfe/side?
*/
for (i = 0; i < 8; i++)
snd_hda_codec_write(codec, pin_nid, 0,
AC_VERB_SET_HDMI_CHAN_SLOT,
(i << 4) | i);
for (i = 0; i < 8; i++) {
err = snd_hda_codec_write(codec, pin_nid, 0,
AC_VERB_SET_HDMI_CHAN_SLOT,
hdmi_channel_mapping[ca][i]);
if (err) {
snd_printdd(KERN_INFO "HDMI: channel mapping failed\n");
break;
}
}
hdmi_debug_channel_mapping(codec, pin_nid);
}