* Generic routines and proc interface for ELD(EDID Like Data) information
*
* Copyright(c) 2008 Intel Corporation.
+ * Copyright (c) 2013 Anssi Hannula <anssi.hannula@iki.fi>
*
* Authors:
* Wu Fengguang <wfg@linux.intel.com>
snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
}
-static void hdmi_print_eld_info(struct snd_info_entry *entry,
- struct snd_info_buffer *buffer)
+void snd_hdmi_print_eld_info(struct hdmi_eld *eld,
+ struct snd_info_buffer *buffer)
{
- struct hdmi_eld *eld = entry->private_data;
struct parsed_hdmi_eld *e = &eld->info;
char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
int i;
[4 ... 7] = "reserved"
};
- mutex_lock(&eld->lock);
snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);
snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);
- if (!eld->eld_valid) {
- mutex_unlock(&eld->lock);
+ if (!eld->eld_valid)
return;
- }
snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
snd_iprintf(buffer, "connection_type\t\t%s\n",
eld_connection_type_names[e->conn_type]);
for (i = 0; i < e->sad_count; i++)
hdmi_print_sad_info(i, e->sad + i, buffer);
- mutex_unlock(&eld->lock);
}
-static void hdmi_write_eld_info(struct snd_info_entry *entry,
- struct snd_info_buffer *buffer)
+void snd_hdmi_write_eld_info(struct hdmi_eld *eld,
+ struct snd_info_buffer *buffer)
{
- struct hdmi_eld *eld = entry->private_data;
struct parsed_hdmi_eld *e = &eld->info;
char line[64];
char name[64];
long long val;
unsigned int n;
- mutex_lock(&eld->lock);
while (!snd_info_get_line(buffer, line, sizeof(line))) {
if (sscanf(line, "%s %llx", name, &val) != 2)
continue;
e->sad_count = n + 1;
}
}
- mutex_unlock(&eld->lock);
-}
-
-
-int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld,
- int index)
-{
- char name[32];
- struct snd_info_entry *entry;
- int err;
-
- snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index);
- err = snd_card_proc_new(codec->bus->card, name, &entry);
- if (err < 0)
- return err;
-
- snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
- entry->c.text.write = hdmi_write_eld_info;
- entry->mode |= S_IWUSR;
- eld->proc_entry = entry;
-
- return 0;
-}
-
-void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld)
-{
- if (!codec->bus->shutdown && eld->proc_entry) {
- snd_device_free(codec->bus->card, eld->proc_entry);
- eld->proc_entry = NULL;
- }
}
-
#endif /* CONFIG_PROC_FS */
/* update PCM info based on ELD */
hinfo->maxbps = min(hinfo->maxbps, maxbps);
hinfo->channels_max = min(hinfo->channels_max, channels_max);
}
+
+
+/* ATI/AMD specific stuff (ELD emulation) */
+
+#define ATI_VERB_SET_AUDIO_DESCRIPTOR 0x776
+#define ATI_VERB_SET_SINK_INFO_INDEX 0x780
+#define ATI_VERB_GET_SPEAKER_ALLOCATION 0xf70
+#define ATI_VERB_GET_AUDIO_DESCRIPTOR 0xf76
+#define ATI_VERB_GET_AUDIO_VIDEO_DELAY 0xf7b
+#define ATI_VERB_GET_SINK_INFO_INDEX 0xf80
+#define ATI_VERB_GET_SINK_INFO_DATA 0xf81
+
+#define ATI_SPKALLOC_SPKALLOC 0x007f
+#define ATI_SPKALLOC_TYPE_HDMI 0x0100
+#define ATI_SPKALLOC_TYPE_DISPLAYPORT 0x0200
+
+/* first three bytes are just standard SAD */
+#define ATI_AUDIODESC_CHANNELS 0x00000007
+#define ATI_AUDIODESC_RATES 0x0000ff00
+#define ATI_AUDIODESC_LPCM_STEREO_RATES 0xff000000
+
+/* in standard HDMI VSDB format */
+#define ATI_DELAY_VIDEO_LATENCY 0x000000ff
+#define ATI_DELAY_AUDIO_LATENCY 0x0000ff00
+
+enum ati_sink_info_idx {
+ ATI_INFO_IDX_MANUFACTURER_ID = 0,
+ ATI_INFO_IDX_PRODUCT_ID = 1,
+ ATI_INFO_IDX_SINK_DESC_LEN = 2,
+ ATI_INFO_IDX_PORT_ID_LOW = 3,
+ ATI_INFO_IDX_PORT_ID_HIGH = 4,
+ ATI_INFO_IDX_SINK_DESC_FIRST = 5,
+ ATI_INFO_IDX_SINK_DESC_LAST = 22, /* max len 18 bytes */
+};
+
+int snd_hdmi_get_eld_ati(struct hda_codec *codec, hda_nid_t nid,
+ unsigned char *buf, int *eld_size, bool rev3_or_later)
+{
+ int spkalloc, ati_sad, aud_synch;
+ int sink_desc_len = 0;
+ int pos, i;
+
+ /* ATI/AMD does not have ELD, emulate it */
+
+ spkalloc = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SPEAKER_ALLOCATION, 0);
+
+ if (spkalloc <= 0) {
+ snd_printd(KERN_INFO "HDMI ATI/AMD: no speaker allocation for ELD\n");
+ return -EINVAL;
+ }
+
+ memset(buf, 0, ELD_FIXED_BYTES + ELD_MAX_MNL + ELD_MAX_SAD * 3);
+
+ /* version */
+ buf[0] = ELD_VER_CEA_861D << 3;
+
+ /* speaker allocation from EDID */
+ buf[7] = spkalloc & ATI_SPKALLOC_SPKALLOC;
+
+ /* is DisplayPort? */
+ if (spkalloc & ATI_SPKALLOC_TYPE_DISPLAYPORT)
+ buf[5] |= 0x04;
+
+ pos = ELD_FIXED_BYTES;
+
+ if (rev3_or_later) {
+ int sink_info;
+
+ snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_LOW);
+ sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
+ put_unaligned_le32(sink_info, buf + 8);
+
+ snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PORT_ID_HIGH);
+ sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
+ put_unaligned_le32(sink_info, buf + 12);
+
+ snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_MANUFACTURER_ID);
+ sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
+ put_unaligned_le16(sink_info, buf + 16);
+
+ snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_PRODUCT_ID);
+ sink_info = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
+ put_unaligned_le16(sink_info, buf + 18);
+
+ snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_LEN);
+ sink_desc_len = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
+
+ if (sink_desc_len > ELD_MAX_MNL) {
+ snd_printd(KERN_INFO "HDMI ATI/AMD: Truncating HDMI sink description with length %d\n",
+ sink_desc_len);
+ sink_desc_len = ELD_MAX_MNL;
+ }
+
+ buf[4] |= sink_desc_len;
+
+ for (i = 0; i < sink_desc_len; i++) {
+ snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_SINK_INFO_INDEX, ATI_INFO_IDX_SINK_DESC_FIRST + i);
+ buf[pos++] = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SINK_INFO_DATA, 0);
+ }
+ }
+
+ for (i = AUDIO_CODING_TYPE_LPCM; i <= AUDIO_CODING_TYPE_WMAPRO; i++) {
+ if (i == AUDIO_CODING_TYPE_SACD || i == AUDIO_CODING_TYPE_DST)
+ continue; /* not handled by ATI/AMD */
+
+ snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_AUDIO_DESCRIPTOR, i << 3);
+ ati_sad = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_DESCRIPTOR, 0);
+
+ if (ati_sad <= 0)
+ continue;
+
+ if (ati_sad & ATI_AUDIODESC_RATES) {
+ /* format is supported, copy SAD as-is */
+ buf[pos++] = (ati_sad & 0x0000ff) >> 0;
+ buf[pos++] = (ati_sad & 0x00ff00) >> 8;
+ buf[pos++] = (ati_sad & 0xff0000) >> 16;
+ }
+
+ if (i == AUDIO_CODING_TYPE_LPCM
+ && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES)
+ && (ati_sad & ATI_AUDIODESC_LPCM_STEREO_RATES) >> 16 != (ati_sad & ATI_AUDIODESC_RATES)) {
+ /* for PCM there is a separate stereo rate mask */
+ buf[pos++] = ((ati_sad & 0x000000ff) & ~ATI_AUDIODESC_CHANNELS) | 0x1;
+ /* rates from the extra byte */
+ buf[pos++] = (ati_sad & 0xff000000) >> 24;
+ buf[pos++] = (ati_sad & 0x00ff0000) >> 16;
+ }
+ }
+
+ if (pos == ELD_FIXED_BYTES + sink_desc_len) {
+ snd_printd(KERN_INFO "HDMI ATI/AMD: no audio descriptors for ELD\n");
+ return -EINVAL;
+ }
+
+ /*
+ * HDMI VSDB latency format:
+ * separately for both audio and video:
+ * 0 field not valid or unknown latency
+ * [1..251] msecs = (x-1)*2 (max 500ms with x = 251 = 0xfb)
+ * 255 audio/video not supported
+ *
+ * HDA latency format:
+ * single value indicating video latency relative to audio:
+ * 0 unknown or 0ms
+ * [1..250] msecs = x*2 (max 500ms with x = 250 = 0xfa)
+ * [251..255] reserved
+ */
+ aud_synch = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_VIDEO_DELAY, 0);
+ if ((aud_synch & ATI_DELAY_VIDEO_LATENCY) && (aud_synch & ATI_DELAY_AUDIO_LATENCY)) {
+ int video_latency_hdmi = (aud_synch & ATI_DELAY_VIDEO_LATENCY);
+ int audio_latency_hdmi = (aud_synch & ATI_DELAY_AUDIO_LATENCY) >> 8;
+
+ if (video_latency_hdmi <= 0xfb && audio_latency_hdmi <= 0xfb &&
+ video_latency_hdmi > audio_latency_hdmi)
+ buf[6] = video_latency_hdmi - audio_latency_hdmi;
+ /* else unknown/invalid or 0ms or video ahead of audio, so use zero */
+ }
+
+ /* SAD count */
+ buf[5] |= ((pos - ELD_FIXED_BYTES - sink_desc_len) / 3) << 4;
+
+ /* Baseline ELD block length is 4-byte aligned */
+ pos = round_up(pos, 4);
+
+ /* Baseline ELD length (4-byte header is not counted in) */
+ buf[2] = (pos - 4) / 4;
+
+ *eld_size = pos;
+
+ return 0;
+}
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff