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authorWu Fengguang <wfg@linux.intel.com>2008-11-21 11:41:50 +0800
committerTakashi Iwai <tiwai@suse.de>2008-11-21 08:27:49 +0100
commitacdda7915eb5dae20b6e43b8b772b712b1ed32c3 (patch)
tree03e2f24563f0046f706a714f7eabf60b9bbfc19e /sound/pci
parentdb742104704cfb047732aa66451c608382da3aee (diff)
ALSA: hda - support writing to the ELD proc file
Allow users to fix quicks of ELD ROMs by writing new values to the ELD proc interface. The format is one or more lines of "name hex_value". Users can add/remove/modify up to 32 SAD(Short Audio Descriptor) entries. Signed-off-by: Wu Fengguang <wfg@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/hda/hda_eld.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c
index 248cddf0ee8..d2b7ccca3bb 100644
--- a/sound/pci/hda/hda_eld.c
+++ b/sound/pci/hda/hda_eld.c
@@ -500,6 +500,59 @@ static void hdmi_print_eld_info(struct snd_info_entry *entry,
hdmi_print_sad_info(i, e->sad + i, buffer);
}
+static void hdmi_write_eld_item(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct hdmi_eld *e = entry->private_data;
+ char line[64];
+ char name[64];
+ char *sname;
+ long long val;
+ int n;
+
+ while (!snd_info_get_line(buffer, line, sizeof(line))) {
+ if (sscanf(line, "%s %llx", name, &val) != 2)
+ continue;
+ if (!strcmp(name, "connection_type"))
+ e->conn_type = val;
+ else if (!strcmp(name, "port_id"))
+ e->port_id = val;
+ else if (!strcmp(name, "support_hdcp"))
+ e->support_hdcp = val;
+ else if (!strcmp(name, "support_ai"))
+ e->support_ai = val;
+ else if (!strcmp(name, "audio_sync_delay"))
+ e->aud_synch_delay = val;
+ else if (!strcmp(name, "speakers"))
+ e->spk_alloc = val;
+ else if (!strcmp(name, "sad_count"))
+ e->sad_count = val;
+ else if (!strncmp(name, "sad", 3)) {
+ sname = name + 4;
+ n = name[3] - '0';
+ if (name[4] >= '0' && name[4] <= '9') {
+ sname++;
+ n = 10 * n + name[4] - '0';
+ }
+ if (n < 0 || n > 31) /* double the CEA limit */
+ continue;
+ if (!strcmp(sname, "_coding_type"))
+ e->sad[n].format = val;
+ else if (!strcmp(sname, "_channels"))
+ e->sad[n].channels = val;
+ else if (!strcmp(sname, "_rates"))
+ e->sad[n].rates = val;
+ else if (!strcmp(sname, "_bits"))
+ e->sad[n].sample_bits = val;
+ else if (!strcmp(sname, "_max_bitrate"))
+ e->sad[n].max_bitrate = val;
+ if (n >= e->sad_count)
+ e->sad_count = n + 1;
+ }
+ }
+}
+
+
int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld)
{
char name[32];
@@ -512,6 +565,9 @@ int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld)
return err;
snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
+ entry->c.text.write = hdmi_write_eld_item;
+ entry->mode |= S_IWUSR;
+
return 0;
}