[alsa-devel] [PATCH 2/3] ALSA: hda - Move chmap support helpers/structures to core
Subhransu S. Prusty
subhransu.s.prusty at intel.com
Mon Feb 22 09:00:39 CET 2016
Copy the channel map helpers to core. The exported channel map
API names are prefixed with snd_hdmi for namespace management.
Arguments of the helpers are modified to take hdac_device object
argument instead of hda_codec specific object. With this it can
be used by other hdac devices.
Next patch removes the local channel map helpers from
patch_hdmi.c and uses these common helpers.
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
include/sound/hdmi_chmap.h | 45 +++
sound/hda/Makefile | 2 +-
sound/hda/hdmi_chmap.c | 763 +++++++++++++++++++++++++++++++++++++++++++++
sound/pci/hda/patch_hdmi.c | 10 -
4 files changed, 809 insertions(+), 11 deletions(-)
create mode 100644 sound/hda/hdmi_chmap.c
diff --git a/include/sound/hdmi_chmap.h b/include/sound/hdmi_chmap.h
index e5ea02a..8e9ddb1 100644
--- a/include/sound/hdmi_chmap.h
+++ b/include/sound/hdmi_chmap.h
@@ -5,10 +5,22 @@
#ifndef __SOUND_HDMI_CHMAP_H
#define __SOUND_HDMI_CHMAP_H
+#include <sound/pcm.h>
#include <sound/hdaudio.h>
struct cea_channel_speaker_allocation;
+#define SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE 80
+
+struct cea_channel_speaker_allocation {
+ int ca_index;
+ int speakers[8];
+
+ /* derived values, just for convenience */
+ int channels;
+ int spk_mask;
+};
+
struct hdmi_chmap_ops {
/*
* Helpers for producing the channel map TLVs. These can be overridden
@@ -28,6 +40,11 @@ struct hdmi_chmap_ops {
void (*set_chmap)(struct hdac_device *hdac, int pcm_idx,
unsigned char *chmap, int prepared);
bool (*is_monitor_connected)(struct hdac_device *hdac, int pcm_idx);
+ /* get and set channel assigned to each HDMI ASP (audio sample packet) slot */
+ int (*pin_get_slot_channel)(struct hdac_device *codec,
+ hda_nid_t pin_nid, int asp_slot);
+ int (*pin_set_slot_channel)(struct hdac_device *codec,
+ hda_nid_t pin_nid, int asp_slot, int channel);
};
struct hdmi_chmap {
@@ -36,4 +53,32 @@ struct hdmi_chmap {
struct hdac_device *hdac;
};
+void snd_hdmi_init_channel_allocations(void);
+int snd_hdmi_get_channel_allocation_order(int ca);
+int snd_hdmi_get_active_channels(int ca);
+struct cea_channel_speaker_allocation *snd_hdmi_get_ch_alloc_from_ca(int ca);
+void snd_hdmi_print_channel_allocation(int spk_alloc, char *buf, int buflen);
+int snd_hdmi_channel_allocation(struct hdac_device *codec,
+ int spk_alloc, int channels);
+int snd_hdmi_to_spk_mask(unsigned char c);
+int snd_hdmi_spk_to_chmap(int spk);
+int snd_hdmi_manual_channel_allocation(int chs, unsigned char *map);
+void snd_hdmi_setup_channel_mapping(struct hdmi_chmap *chmap,
+ hda_nid_t pin_nid, bool non_pcm, int ca,
+ int channels, unsigned char *map,
+ bool chmap_set);
+int snd_hdmi_pin_set_slot_channel(struct hdac_device *codec, hda_nid_t pin_nid,
+ int asp_slot, int channel);
+int snd_hdmi_pin_get_slot_channel(struct hdac_device *codec, hda_nid_t pin_nid,
+ int asp_slot);
+void snd_hdmi_set_channel_count(struct hdac_device *codec,
+ hda_nid_t cvt_nid, int chs);
+int snd_hdmi_chmap_cea_alloc_validate_get_type(
+ struct cea_channel_speaker_allocation *cap,
+ int channels);
+void snd_hdmi_cea_alloc_to_tlv_chmap(
+ struct cea_channel_speaker_allocation *cap,
+ unsigned int *chmap, int channels);
+int snd_hdmi_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
+ struct hdmi_chmap *chmap);
#endif /* __SOUND_HDMI_CHMAP_H */
diff --git a/sound/hda/Makefile b/sound/hda/Makefile
index 7e999c9..3b9bede 100644
--- a/sound/hda/Makefile
+++ b/sound/hda/Makefile
@@ -1,5 +1,5 @@
snd-hda-core-objs := hda_bus_type.o hdac_bus.o hdac_device.o hdac_sysfs.o \
- hdac_regmap.o hdac_controller.o hdac_stream.o array.o
+ hdac_regmap.o hdac_controller.o hdac_stream.o array.o hdmi_chmap.o
snd-hda-core-objs += trace.o
CFLAGS_trace.o := -I$(src)
diff --git a/sound/hda/hdmi_chmap.c b/sound/hda/hdmi_chmap.c
new file mode 100644
index 0000000..78b421f
--- /dev/null
+++ b/sound/hda/hdmi_chmap.c
@@ -0,0 +1,763 @@
+/*
+ * HDMI Channel map support helpers
+ */
+
+#include <linux/module.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/tlv.h>
+
+#include <sound/hdaudio.h>
+#include <sound/hdmi_chmap.h>
+
+/*
+ * CEA speaker placement:
+ *
+ * FLH FCH FRH
+ * FLW FL FLC FC FRC FR FRW
+ *
+ * LFE
+ * TC
+ *
+ * RL RLC RC RRC RR
+ *
+ * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to
+ * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC.
+ */
+enum cea_speaker_placement {
+ FL = (1 << 0), /* Front Left */
+ FC = (1 << 1), /* Front Center */
+ FR = (1 << 2), /* Front Right */
+ FLC = (1 << 3), /* Front Left Center */
+ FRC = (1 << 4), /* Front Right Center */
+ RL = (1 << 5), /* Rear Left */
+ RC = (1 << 6), /* Rear Center */
+ RR = (1 << 7), /* Rear Right */
+ RLC = (1 << 8), /* Rear Left Center */
+ RRC = (1 << 9), /* Rear Right Center */
+ LFE = (1 << 10), /* Low Frequency Effect */
+ FLW = (1 << 11), /* Front Left Wide */
+ FRW = (1 << 12), /* Front Right Wide */
+ FLH = (1 << 13), /* Front Left High */
+ FCH = (1 << 14), /* Front Center High */
+ FRH = (1 << 15), /* Front Right High */
+ TC = (1 << 16), /* Top Center */
+};
+
+static const char * const cea_speaker_allocation_names[] = {
+ /* 0 */ "FL/FR",
+ /* 1 */ "LFE",
+ /* 2 */ "FC",
+ /* 3 */ "RL/RR",
+ /* 4 */ "RC",
+ /* 5 */ "FLC/FRC",
+ /* 6 */ "RLC/RRC",
+ /* 7 */ "FLW/FRW",
+ /* 8 */ "FLH/FRH",
+ /* 9 */ "TC",
+ /* 10 */ "FCH",
+};
+
+/*
+ * ELD SA bits in the CEA Speaker Allocation data block
+ */
+static int eld_speaker_allocation_bits[] = {
+ [0] = FL | FR,
+ [1] = LFE,
+ [2] = FC,
+ [3] = RL | RR,
+ [4] = RC,
+ [5] = FLC | FRC,
+ [6] = RLC | RRC,
+ /* the following are not defined in ELD yet */
+ [7] = FLW | FRW,
+ [8] = FLH | FRH,
+ [9] = TC,
+ [10] = FCH,
+};
+
+/*
+ * 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, 0x35, 0x42, 0xf3, 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!
+ *
+ * The preceding ones have better chances to be selected by
+ * hdmi_channel_allocation().
+ */
+static struct cea_channel_speaker_allocation channel_allocations[] = {
+/* 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 = 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 } },
+{ .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 } },
+{ .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 } },
+{ .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } },
+{ .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } },
+{ .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } },
+{ .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } },
+{ .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } },
+{ .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } },
+{ .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } },
+{ .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } },
+{ .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } },
+{ .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } },
+{ .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } },
+{ .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } },
+};
+
+/*
+ * Channel mapping routines
+ */
+
+/*
+ * Compute derived values in channel_allocations[].
+ */
+void snd_hdmi_init_channel_allocations(void)
+{
+ int i, j;
+ struct cea_channel_speaker_allocation *p;
+
+ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+ p = channel_allocations + i;
+ p->channels = 0;
+ p->spk_mask = 0;
+ for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
+ if (p->speakers[j]) {
+ p->channels++;
+ p->spk_mask |= p->speakers[j];
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_init_channel_allocations);
+
+int snd_hdmi_get_channel_allocation_order(int ca)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+ if (channel_allocations[i].ca_index == ca)
+ break;
+ }
+ return i;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_get_channel_allocation_order);
+
+int snd_hdmi_get_active_channels(int ca)
+{
+ return channel_allocations[ca].channels;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_get_active_channels);
+
+struct cea_channel_speaker_allocation *snd_hdmi_get_ch_alloc_from_ca(int ca)
+{
+ return &channel_allocations[snd_hdmi_get_channel_allocation_order(ca)];
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_get_ch_alloc_from_ca);
+
+void snd_hdmi_print_channel_allocation(int spk_alloc, char *buf, int buflen)
+{
+ int i, j;
+
+ for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
+ if (spk_alloc & (1 << i))
+ j += snprintf(buf + j, buflen - j, " %s",
+ cea_speaker_allocation_names[i]);
+ }
+ buf[j] = '\0'; /* necessary when j == 0 */
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_print_channel_allocation);
+
+/*
+ * The transformation takes two steps:
+ *
+ * eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
+ * spk_mask => (channel_allocations[]) => ai->CA
+ *
+ * TODO: it could select the wrong CA from multiple candidates.
+*/
+int snd_hdmi_channel_allocation(struct hdac_device *codec,
+ int spk_alloc, int channels)
+{
+ int i;
+ int ca = 0;
+ int spk_mask = 0;
+ char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
+
+ /*
+ * CA defaults to 0 for basic stereo audio
+ */
+ if (channels <= 2)
+ return 0;
+
+ /*
+ * expand ELD's speaker allocation mask
+ *
+ * ELD tells the speaker mask in a compact(paired) form,
+ * expand ELD's notions to match the ones used by Audio InfoFrame.
+ */
+ for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
+ if (spk_alloc & (1 << i))
+ spk_mask |= eld_speaker_allocation_bits[i];
+ }
+
+ /* search for the first working match in the CA table */
+ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+ if (channels == channel_allocations[i].channels &&
+ (spk_mask & channel_allocations[i].spk_mask) ==
+ channel_allocations[i].spk_mask) {
+ ca = channel_allocations[i].ca_index;
+ break;
+ }
+ }
+
+ if (!ca) {
+ /*
+ * if there was no match, select the regular ALSA channel
+ * allocation with the matching number of channels
+ */
+ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+ if (channels == channel_allocations[i].channels) {
+ ca = channel_allocations[i].ca_index;
+ break;
+ }
+ }
+ }
+
+ snd_hdmi_print_channel_allocation(spk_alloc, buf, sizeof(buf));
+ dev_dbg(&codec->dev, "HDMI: select CA 0x%x for %d-channel allocation: %s\n",
+ ca, channels, buf);
+
+ return ca;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_channel_allocation);
+
+static void hdmi_debug_channel_mapping(struct hdmi_chmap *chmap,
+ hda_nid_t pin_nid)
+{
+#ifdef CONFIG_SND_DEBUG_VERBOSE
+ int i;
+ int channel;
+
+ for (i = 0; i < 8; i++) {
+ channel = chmap->ops.pin_get_slot_channel(chmap->hdac, pin_nid, i);
+ dev_dbg(&chmap->hdac->dev, "HDMI: ASP channel %d => slot %d\n",
+ channel, i);
+ }
+#endif
+}
+
+static void hdmi_std_setup_channel_mapping(struct hdmi_chmap *chmap,
+ hda_nid_t pin_nid,
+ bool non_pcm,
+ int ca)
+{
+ struct cea_channel_speaker_allocation *ch_alloc;
+ int i;
+ int err;
+ int order;
+ int non_pcm_mapping[8];
+
+ order = snd_hdmi_get_channel_allocation_order(ca);
+ ch_alloc = &channel_allocations[order];
+
+ if (hdmi_channel_mapping[ca][1] == 0) {
+ int hdmi_slot = 0;
+ /* fill actual channel mappings in ALSA channel (i) order */
+ for (i = 0; i < ch_alloc->channels; i++) {
+ while (!ch_alloc->speakers[7 - hdmi_slot] && !WARN_ON(hdmi_slot >= 8))
+ hdmi_slot++; /* skip zero slots */
+
+ hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++;
+ }
+ /* fill the rest of the slots with ALSA channel 0xf */
+ for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++)
+ if (!ch_alloc->speakers[7 - hdmi_slot])
+ hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot;
+ }
+
+ if (non_pcm) {
+ for (i = 0; i < ch_alloc->channels; i++)
+ non_pcm_mapping[i] = (i << 4) | i;
+ for (; i < 8; i++)
+ non_pcm_mapping[i] = (0xf << 4) | i;
+ }
+
+ for (i = 0; i < 8; i++) {
+ int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i];
+ int hdmi_slot = slotsetup & 0x0f;
+ int channel = (slotsetup & 0xf0) >> 4;
+
+ err = chmap->ops.pin_set_slot_channel(chmap->hdac, pin_nid, hdmi_slot, channel);
+ if (err) {
+ dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n");
+ break;
+ }
+ }
+}
+
+struct channel_map_table {
+ unsigned char map; /* ALSA API channel map position */
+ int spk_mask; /* speaker position bit mask */
+};
+
+static struct channel_map_table map_tables[] = {
+ { SNDRV_CHMAP_FL, FL },
+ { SNDRV_CHMAP_FR, FR },
+ { SNDRV_CHMAP_RL, RL },
+ { SNDRV_CHMAP_RR, RR },
+ { SNDRV_CHMAP_LFE, LFE },
+ { SNDRV_CHMAP_FC, FC },
+ { SNDRV_CHMAP_RLC, RLC },
+ { SNDRV_CHMAP_RRC, RRC },
+ { SNDRV_CHMAP_RC, RC },
+ { SNDRV_CHMAP_FLC, FLC },
+ { SNDRV_CHMAP_FRC, FRC },
+ { SNDRV_CHMAP_TFL, FLH },
+ { SNDRV_CHMAP_TFR, FRH },
+ { SNDRV_CHMAP_FLW, FLW },
+ { SNDRV_CHMAP_FRW, FRW },
+ { SNDRV_CHMAP_TC, TC },
+ { SNDRV_CHMAP_TFC, FCH },
+ {} /* terminator */
+};
+
+/* from ALSA API channel position to speaker bit mask */
+int snd_hdmi_to_spk_mask(unsigned char c)
+{
+ struct channel_map_table *t = map_tables;
+
+ for (; t->map; t++) {
+ if (t->map == c)
+ return t->spk_mask;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_to_spk_mask);
+
+/* from ALSA API channel position to CEA slot */
+static int to_cea_slot(int ordered_ca, unsigned char pos)
+{
+ int mask = snd_hdmi_to_spk_mask(pos);
+ int i;
+
+ if (mask) {
+ for (i = 0; i < 8; i++) {
+ if (channel_allocations[ordered_ca].speakers[7 - i] == mask)
+ return i;
+ }
+ }
+
+ return -1;
+}
+
+/* from speaker bit mask to ALSA API channel position */
+int snd_hdmi_spk_to_chmap(int spk)
+{
+ struct channel_map_table *t = map_tables;
+
+ for (; t->map; t++) {
+ if (t->spk_mask == spk)
+ return t->map;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_spk_to_chmap);
+
+/* from CEA slot to ALSA API channel position */
+static int from_cea_slot(int ordered_ca, unsigned char slot)
+{
+ int mask = channel_allocations[ordered_ca].speakers[7 - slot];
+
+ return snd_hdmi_spk_to_chmap(mask);
+}
+
+/* get the CA index corresponding to the given ALSA API channel map */
+int snd_hdmi_manual_channel_allocation(int chs, unsigned char *map)
+{
+ int i, spks = 0, spk_mask = 0;
+
+ for (i = 0; i < chs; i++) {
+ int mask = snd_hdmi_to_spk_mask(map[i]);
+
+ if (mask) {
+ spk_mask |= mask;
+ spks++;
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
+ if ((chs == channel_allocations[i].channels ||
+ spks == channel_allocations[i].channels) &&
+ (spk_mask & channel_allocations[i].spk_mask) ==
+ channel_allocations[i].spk_mask)
+ return channel_allocations[i].ca_index;
+ }
+ return -1;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_manual_channel_allocation);
+
+/* set up the channel slots for the given ALSA API channel map */
+static int hdmi_manual_setup_channel_mapping(struct hdmi_chmap *chmap,
+ hda_nid_t pin_nid,
+ int chs, unsigned char *map,
+ int ca)
+{
+ int ordered_ca = snd_hdmi_get_channel_allocation_order(ca);
+ int alsa_pos, hdmi_slot;
+ int assignments[8] = {[0 ... 7] = 0xf};
+
+ for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) {
+
+ hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]);
+
+ if (hdmi_slot < 0)
+ continue; /* unassigned channel */
+
+ assignments[hdmi_slot] = alsa_pos;
+ }
+
+ for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) {
+ int err;
+
+ err = chmap->ops.pin_set_slot_channel(chmap->hdac, pin_nid, hdmi_slot,
+ assignments[hdmi_slot]);
+ if (err)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* store ALSA API channel map from the current default map */
+static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
+{
+ int i;
+ int ordered_ca = snd_hdmi_get_channel_allocation_order(ca);
+
+ for (i = 0; i < 8; i++) {
+ if (i < channel_allocations[ordered_ca].channels)
+ map[i] = from_cea_slot(ordered_ca,
+ hdmi_channel_mapping[ca][i] & 0x0f);
+ else
+ map[i] = 0;
+ }
+}
+
+void snd_hdmi_setup_channel_mapping(struct hdmi_chmap *chmap,
+ hda_nid_t pin_nid, bool non_pcm, int ca,
+ int channels, unsigned char *map,
+ bool chmap_set)
+{
+ if (!non_pcm && chmap_set) {
+ hdmi_manual_setup_channel_mapping(chmap, pin_nid,
+ channels, map, ca);
+ } else {
+ hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca);
+ hdmi_setup_fake_chmap(map, ca);
+ }
+
+ hdmi_debug_channel_mapping(chmap, pin_nid);
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_setup_channel_mapping);
+
+int snd_hdmi_pin_set_slot_channel(struct hdac_device *codec, hda_nid_t pin_nid,
+ int asp_slot, int channel)
+{
+ return snd_hdac_codec_write(codec, pin_nid, 0,
+ AC_VERB_SET_HDMI_CHAN_SLOT,
+ (channel << 4) | asp_slot);
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_pin_set_slot_channel);
+
+int snd_hdmi_pin_get_slot_channel(struct hdac_device *codec, hda_nid_t pin_nid,
+ int asp_slot)
+{
+ return (snd_hdac_codec_read(codec, pin_nid, 0,
+ AC_VERB_GET_HDMI_CHAN_SLOT,
+ asp_slot) & 0xf0) >> 4;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_pin_get_slot_channel);
+
+static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid)
+{
+ return 1 + snd_hdac_codec_read(codec, cvt_nid, 0,
+ AC_VERB_GET_CVT_CHAN_COUNT, 0);
+}
+
+void snd_hdmi_set_channel_count(struct hdac_device *codec,
+ hda_nid_t cvt_nid, int chs)
+{
+ if (chs != hdmi_get_channel_count(codec, cvt_nid))
+ snd_hdac_codec_write(codec, cvt_nid, 0,
+ AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_set_channel_count);
+
+/*
+ * ALSA API channel-map control callbacks
+ */
+static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct hdmi_chmap *chmap = info->private_data;
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = chmap->channels_max;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = SNDRV_CHMAP_LAST;
+ return 0;
+}
+
+int snd_hdmi_chmap_cea_alloc_validate_get_type(
+ struct cea_channel_speaker_allocation *cap,
+ int channels)
+{
+ /* If the speaker allocation matches the channel count, it is OK.*/
+ if (cap->channels != channels)
+ return -1;
+
+ /* all channels are remappable freely */
+ return SNDRV_CTL_TLVT_CHMAP_VAR;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_chmap_cea_alloc_validate_get_type);
+
+void snd_hdmi_cea_alloc_to_tlv_chmap(struct cea_channel_speaker_allocation *cap,
+ unsigned int *chmap, int channels)
+{
+ int count = 0;
+ int c;
+
+ for (c = 7; c >= 0; c--) {
+ int spk = cap->speakers[c];
+
+ if (!spk)
+ continue;
+
+ chmap[count++] = snd_hdmi_spk_to_chmap(spk);
+ }
+
+ WARN_ON(count != channels);
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_cea_alloc_to_tlv_chmap);
+
+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 hdmi_chmap *chmap = info->private_data;
+ unsigned int __user *dst;
+ int chs, count = 0;
+
+ if (size < 8)
+ return -ENOMEM;
+ if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
+ return -EFAULT;
+ size -= 8;
+ dst = tlv + 2;
+ for (chs = 2; chs <= chmap->channels_max; chs++) {
+ int i;
+ struct 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(
+ cap, chs);
+ unsigned int tlv_chmap[8];
+
+ if (type < 0)
+ continue;
+ 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(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;
+}
+
+static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct hdmi_chmap *hchmap = info->private_data;
+ int pcm_idx = kcontrol->private_value;
+ unsigned char chmap[8];
+ int i;
+
+ memset(chmap, 0, sizeof(chmap));
+ hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, chmap);
+
+ for (i = 0; i < sizeof(chmap); i++)
+ ucontrol->value.integer.value[i] = chmap[i];
+
+ return 0;
+}
+
+static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct hdmi_chmap *hchmap = info->private_data;
+ int pcm_idx = kcontrol->private_value;
+ unsigned int ctl_idx;
+ struct snd_pcm_substream *substream;
+ unsigned char chmap[8], per_pin_chmap[8];
+ int i, err, ca, prepared = 0;
+
+ /* No monitor is connected in dyn_pcm_assign.
+ * It's invalid to setup the chmap
+ */
+ if (!hchmap->ops.is_monitor_connected(hchmap->hdac, pcm_idx))
+ return 0;
+
+ ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+ substream = snd_pcm_chmap_substream(info, ctl_idx);
+ if (!substream || !substream->runtime)
+ return 0; /* just for avoiding error from alsactl restore */
+ switch (substream->runtime->status->state) {
+ case SNDRV_PCM_STATE_OPEN:
+ case SNDRV_PCM_STATE_SETUP:
+ break;
+ case SNDRV_PCM_STATE_PREPARED:
+ prepared = 1;
+ break;
+ default:
+ return -EBUSY;
+ }
+ memset(chmap, 0, sizeof(chmap));
+ for (i = 0; i < ARRAY_SIZE(chmap); i++)
+ chmap[i] = ucontrol->value.integer.value[i];
+
+ hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap);
+ if (!memcmp(chmap, per_pin_chmap, sizeof(chmap)))
+ return 0;
+ ca = snd_hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
+ if (ca < 0)
+ return -EINVAL;
+ if (hchmap->ops.chmap_validate) {
+ err = hchmap->ops.chmap_validate(ca, ARRAY_SIZE(chmap), chmap);
+ if (err)
+ return err;
+ }
+
+ hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared);
+
+ return 0;
+}
+
+int snd_hdmi_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
+ struct hdmi_chmap *hchmap)
+{
+ struct snd_pcm_chmap *chmap;
+ struct snd_kcontrol *kctl;
+ int err, i;
+
+ err = snd_pcm_add_chmap_ctls(pcm,
+ SNDRV_PCM_STREAM_PLAYBACK,
+ NULL, 0, pcm_idx, &chmap);
+ if (err < 0)
+ return err;
+ /* override handlers */
+ chmap->private_data = hchmap;
+ kctl = chmap->kctl;
+ for (i = 0; i < kctl->count; i++)
+ kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
+ kctl->info = hdmi_chmap_ctl_info;
+ kctl->get = hdmi_chmap_ctl_get;
+ kctl->put = hdmi_chmap_ctl_put;
+ kctl->tlv.c = hdmi_chmap_ctl_tlv;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdmi_add_chmap_ctls);
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index d73698c..0861209 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -102,7 +102,6 @@ struct hdmi_spec_per_pin {
#endif
};
-struct cea_channel_speaker_allocation;
/* operations used by generic code that can be overridden by patches */
struct hdmi_ops {
int (*pin_get_eld)(struct hda_codec *codec, hda_nid_t pin_nid,
@@ -257,15 +256,6 @@ static int eld_speaker_allocation_bits[] = {
[10] = FCH,
};
-struct cea_channel_speaker_allocation {
- int ca_index;
- int speakers[8];
-
- /* derived values, just for convenience */
- int channels;
- int spk_mask;
-};
-
/*
* ALSA sequence is:
*
--
1.9.1
More information about the Alsa-devel
mailing list