From 5f1e71b1cc2cc788c0f452772e2ce5e7430c40c2 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Tue, 18 Nov 2008 11:47:53 +0800 Subject: [PATCH] ALSA: ELD proc interface for HDMI sinks Create /proc/asound/card/eld# to reflect the audio configurations and capabilities of the attached HDMI sink. Some notes: - Shall we show an empty file if the ELD content is not valid? Well it's not that simple. There could be partially populated ELD, and there may be malformed ELD provided by buggy drivers/monitors. So expose ELD as it is. - The ELD retrieval routines rely on the Intel HDA interface, others are/could be universal and independent ones. - How do we name the proc file? If there are going to be two HDMI pins per codec, then the current naming scheme (eld#) will fail. Luckily the user space dependencies should be minimal, so it would be trivial to do the rename if that happens. - The ELD proc file content is designed to be easy for scripts and human reading. Its lines all have the pattern: \t[\t]* where is a keyword in c language, while could be any contents, including white spaces. could also be a null value. Signed-off-by: Wu Fengguang Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_eld.c | 74 +++++++++++++++++++++++++++++++++ sound/pci/hda/hda_local.h | 9 ++++ sound/pci/hda/patch_intelhdmi.c | 2 + 3 files changed, 85 insertions(+) diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c index a69a7e87d26..7fa065cd1d9 100644 --- a/sound/pci/hda/hda_eld.c +++ b/sound/pci/hda/hda_eld.c @@ -452,3 +452,77 @@ void snd_hdmi_show_eld(struct sink_eld *e) for (i = 0; i < e->sad_count; i++) hdmi_show_short_audio_desc(e->sad + i); } + +#ifdef CONFIG_PROC_FS + +static void hdmi_print_sad_info(int i, struct cea_sad *a, + struct snd_info_buffer *buffer) +{ + char buf[80]; + + snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n", + i, a->format, cea_audio_coding_type_names[a->format]); + snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels); + + snd_print_pcm_rates(a->rates, buf, sizeof(buf)); + snd_iprintf(buffer, "sad%d_sampling_rates\t[0x%x] %s\n", + i, a->rates, buf); + + if (a->format == AUDIO_CODING_TYPE_LPCM) + snd_iprintf(buffer, "sad%d_sample_bits\t0x%x\n", + i, a->sample_bits); + + if (a->max_bitrate) + snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n", + i, a->max_bitrate); + + if (a->profile) + 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) +{ + struct sink_eld *e = entry->private_data; + char buf[HDMI_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; + int i; + + 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]); + snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver, + eld_versoin_names[e->eld_ver]); + snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver, + cea_edid_version_names[e->cea_edid_ver]); + snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id); + snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id); + snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id); + snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp); + snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai); + snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay); + + hdmi_print_channel_allocation(e->spk_alloc, buf, sizeof(buf)); + snd_iprintf(buffer, "speakers\t\t[0x%x] %s\n", e->spk_alloc, buf); + + snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count); + + for (i = 0; i < e->sad_count; i++) + hdmi_print_sad_info(i, e->sad + i, buffer); +} + +int snd_hda_eld_proc_new(struct hda_codec *codec, struct sink_eld *eld) +{ + char name[32]; + struct snd_info_entry *entry; + int err; + + snprintf(name, sizeof(name), "eld#%d", codec->addr); + 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); + return 0; +} + +#endif diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index e1b76686672..02ac7321e5e 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -484,4 +484,13 @@ int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid); int snd_hdmi_get_eld(struct sink_eld *, struct hda_codec *, hda_nid_t); void snd_hdmi_show_eld(struct sink_eld *eld); +#ifdef CONFIG_PROC_FS +int snd_hda_eld_proc_new(struct hda_codec *codec, struct sink_eld *eld); +#else +inline int snd_hda_eld_proc_new(struct hda_codec *codec, struct sink_eld *eld) +{ + return 0; +} +#endif + #endif /* __SOUND_HDA_LOCAL_H */ diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c index 489278d3d77..c95abc47614 100644 --- a/sound/pci/hda/patch_intelhdmi.c +++ b/sound/pci/hda/patch_intelhdmi.c @@ -446,6 +446,8 @@ static int patch_intel_hdmi(struct hda_codec *codec) codec->spec = spec; codec->patch_ops = intel_hdmi_patch_ops; + snd_hda_eld_proc_new(codec, &spec->sink); + return 0; } -- 2.41.1