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ALSA: hda - Allow override more fields via patch loader

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Allow the override of vendor-id, subsystem-id, revision-id and chip name
via patch loading.  Updated the document, too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2010-01-28 00:01:53 +01:00
parent ccc5df058d
commit b09f3e78ee
2 changed files with 65 additions and 15 deletions
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27
Documentation/sound/alsa/HD-Audio.txt
View File

@ -452,6 +452,33 @@ Similarly, the lines after `[verb]` are parsed as `init_verbs`
sysfs entries, and the lines after `[hint]` are parsed as `hints`
sysfs entries, respectively.
Another example to override the codec vendor id from 0x12345678 to
0xdeadbeef is like below:
------------------------------------------------------------------------
[codec]
0x12345678 0xabcd1234 2
[vendor_id]
0xdeadbeef
------------------------------------------------------------------------
In the similar way, you can override the codec subsystem_id via
`[subsystem_id]`, the revision id via `[revision_id]` line.
Also, the codec chip name can be rewritten via `[chip_name]` line.
------------------------------------------------------------------------
[codec]
0x12345678 0xabcd1234 2
[subsystem_id]
0xffff1111
[revision_id]
0x10
[chip_name]
My-own NEWS-0002
------------------------------------------------------------------------
The hd-audio driver reads the file via request_firmware(). Thus,
a patch file has to be located on the appropriate firmware path,
typically, /lib/firmware. For example, when you pass the option

53
sound/pci/hda/hda_hwdep.c
View File

@ -625,6 +625,10 @@ enum {
LINE_MODE_PINCFG,
LINE_MODE_VERB,
LINE_MODE_HINT,
LINE_MODE_VENDOR_ID,
LINE_MODE_SUBSYSTEM_ID,
LINE_MODE_REVISION_ID,
LINE_MODE_CHIP_NAME,
NUM_LINE_MODES,
};
@ -654,53 +658,71 @@ static void parse_codec_mode(char *buf, struct hda_bus *bus,
}
/* parse the contents after the other command tags, [pincfg], [verb],
* [hint] and [model]
* [vendor_id], [subsystem_id], [revision_id], [chip_name], [hint] and [model]
* just pass to the sysfs helper (only when any codec was specified)
*/
static void parse_pincfg_mode(char *buf, struct hda_bus *bus,
struct hda_codec **codecp)
{
if (!*codecp)
return;
parse_user_pin_configs(*codecp, buf);
}
static void parse_verb_mode(char *buf, struct hda_bus *bus,
struct hda_codec **codecp)
{
if (!*codecp)
return;
parse_init_verbs(*codecp, buf);
}
static void parse_hint_mode(char *buf, struct hda_bus *bus,
struct hda_codec **codecp)
{
if (!*codecp)
return;
parse_hints(*codecp, buf);
}
static void parse_model_mode(char *buf, struct hda_bus *bus,
struct hda_codec **codecp)
{
if (!*codecp)
return;
kfree((*codecp)->modelname);
(*codecp)->modelname = kstrdup(buf, GFP_KERNEL);
}
static void parse_chip_name_mode(char *buf, struct hda_bus *bus,
struct hda_codec **codecp)
{
kfree((*codecp)->chip_name);
(*codecp)->chip_name = kstrdup(buf, GFP_KERNEL);
}
#define DEFINE_PARSE_ID_MODE(name) \
static void parse_##name##_mode(char *buf, struct hda_bus *bus, \
struct hda_codec **codecp) \
{ \
unsigned long val; \
if (!strict_strtoul(buf, 0, &val)) \
(*codecp)->name = val; \
}
DEFINE_PARSE_ID_MODE(vendor_id);
DEFINE_PARSE_ID_MODE(subsystem_id);
DEFINE_PARSE_ID_MODE(revision_id);
struct hda_patch_item {
const char *tag;
void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc);
int need_codec;
};
static struct hda_patch_item patch_items[NUM_LINE_MODES] = {
[LINE_MODE_CODEC] = { "[codec]", parse_codec_mode },
[LINE_MODE_MODEL] = { "[model]", parse_model_mode },
[LINE_MODE_VERB] = { "[verb]", parse_verb_mode },
[LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode },
[LINE_MODE_HINT] = { "[hint]", parse_hint_mode },
[LINE_MODE_CODEC] = { "[codec]", parse_codec_mode, 0 },
[LINE_MODE_MODEL] = { "[model]", parse_model_mode, 1 },
[LINE_MODE_VERB] = { "[verb]", parse_verb_mode, 1 },
[LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode, 1 },
[LINE_MODE_HINT] = { "[hint]", parse_hint_mode, 1 },
[LINE_MODE_VENDOR_ID] = { "[vendor_id]", parse_vendor_id_mode, 1 },
[LINE_MODE_SUBSYSTEM_ID] = { "[subsystem_id]", parse_subsystem_id_mode, 1 },
[LINE_MODE_REVISION_ID] = { "[revision_id]", parse_revision_id_mode, 1 },
[LINE_MODE_CHIP_NAME] = { "[chip_name]", parse_chip_name_mode, 1 },
};
/* check the line starting with '[' -- change the parser mode accodingly */
@ -783,7 +805,8 @@ int snd_hda_load_patch(struct hda_bus *bus, const char *patch)
continue;
if (*buf == '[')
line_mode = parse_line_mode(buf, bus);
else if (patch_items[line_mode].parser)
else if (patch_items[line_mode].parser &&
(codec || !patch_items[line_mode].need_codec))
patch_items[line_mode].parser(buf, bus, &codec);
}
release_firmware(fw);