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SubjectRe: ALSA: HDA: conexant support for Lenovo T520/W520
At Tue, 18 Oct 2011 11:00:01 +0200,
Daniel Suchy wrote:
>
> Hello,
> thanks for information.
>
> My output from alsa-info is available at
> http://www.alsa-project.org/db/?f=94efb9fda4bcf6771ca4868c62b11994dc4dc776
>
> Internal microphone works fine for me, but I don't have external one for
> testing at this time. FYI, T520 also doesn't have external microphone
> input, it's available only over docking station (Minidock 3). I'll
> perform more tests in upcoming days (generally, I don't use audio inputs
> too much), also with your patch.

Wait, did you test "Internal Mic" or "Mic" volume?
In your case, only the former volume should affect the recording level
from the built-in mic, not the latter. If the latter changes the
recording level, it's a bug. And the patch I attached in the previous
mail should fix it.

> There's another issue I observed related to audio outputs, but I'm not
> sure about the reason. With docking station, audio isn't working over
> audio output on the Minidock 3. Internal speakers are cutted off
> properly, but there's no sound output on the connector. Audio output on
> T520 directly works as expected, only output on minidock has this
> problem. If you have any hints, let me know. This happens even with
> autodetection enabled (this was my initial motivation for looking into
> the driver source, and also CXT5066_THINKPAD quirk, which I tested
> previously has this problem).

Might be an EAPD issue? There is another pending patch. Attached
below.


thanks,

Takashi

---
From: Takashi Iwai <tiwai@suse.de>
Subject: [PATCH] ALSA: hda - Keep EAPD turned on for old Conexant chips
In the old Conexant chips (5045, 5047, 5051 and 5066), a single EAPD
may handle both headphone and speaker outputs while it's assigned only
to one of them. Turning off dynamically leads to the unexpected silent
output in such a configuration with the auto-mute function.

Since it's difficult to know how the EAPD is handled in the actual h/w
implementation, better to keep EAPD on while running for such codecs.

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/pci/hda/patch_conexant.c | 43 ++++++++++++++++++++-------------------
1 files changed, 22 insertions(+), 21 deletions(-)
diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index aa0e4b9..feef775 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -136,6 +136,7 @@ struct conexant_spec {
unsigned int thinkpad:1;
unsigned int hp_laptop:1;
unsigned int asus:1;
+ unsigned int pin_eapd_ctrls:1;

unsigned int adc_switching:1;

@@ -3429,12 +3430,14 @@ static void cx_auto_turn_eapd(struct hda_codec *codec, int num_pins,
static void do_automute(struct hda_codec *codec, int num_pins,
hda_nid_t *pins, bool on)
{
+ struct conexant_spec *spec = codec->spec;
int i;
for (i = 0; i < num_pins; i++)
snd_hda_codec_write(codec, pins[i], 0,
AC_VERB_SET_PIN_WIDGET_CONTROL,
on ? PIN_OUT : 0);
- cx_auto_turn_eapd(codec, num_pins, pins, on);
+ if (spec->pin_eapd_ctrls)
+ cx_auto_turn_eapd(codec, num_pins, pins, on);
}

static int detect_jacks(struct hda_codec *codec, int num_pins, hda_nid_t *pins)
@@ -3459,9 +3462,12 @@ static void cx_auto_update_speakers(struct hda_codec *codec)
int on = 1;

/* turn on HP EAPD when HP jacks are present */
- if (spec->auto_mute)
- on = spec->hp_present;
- cx_auto_turn_eapd(codec, cfg->hp_outs, cfg->hp_pins, on);
+ if (spec->pin_eapd_ctrls) {
+ if (spec->auto_mute)
+ on = spec->hp_present;
+ cx_auto_turn_eapd(codec, cfg->hp_outs, cfg->hp_pins, on);
+ }
+
/* mute speakers in auto-mode if HP or LO jacks are plugged */
if (spec->auto_mute)
on = !(spec->hp_present ||
@@ -3888,20 +3894,10 @@ static void cx_auto_parse_beep(struct hda_codec *codec)
#define cx_auto_parse_beep(codec)
#endif

-static bool found_in_nid_list(hda_nid_t nid, const hda_nid_t *list, int nums)
-{
- int i;
- for (i = 0; i < nums; i++)
- if (list[i] == nid)
- return true;
- return false;
-}
-
-/* parse extra-EAPD that aren't assigned to any pins */
+/* parse EAPDs */
static void cx_auto_parse_eapd(struct hda_codec *codec)
{
struct conexant_spec *spec = codec->spec;
- struct auto_pin_cfg *cfg = &spec->autocfg;
hda_nid_t nid, end_nid;

end_nid = codec->start_nid + codec->num_nodes;
@@ -3910,14 +3906,18 @@ static void cx_auto_parse_eapd(struct hda_codec *codec)
continue;
if (!(snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_EAPD))
continue;
- if (found_in_nid_list(nid, cfg->line_out_pins, cfg->line_outs) ||
- found_in_nid_list(nid, cfg->hp_pins, cfg->hp_outs) ||
- found_in_nid_list(nid, cfg->speaker_pins, cfg->speaker_outs))
- continue;
spec->eapds[spec->num_eapds++] = nid;
if (spec->num_eapds >= ARRAY_SIZE(spec->eapds))
break;
}
+
+ /* NOTE: below is a wild guess; if we have more than two EAPDs,
+ * it's a new chip, where EAPDs are supposed to be associated to
+ * pins, and we can control EAPD per pin.
+ * OTOH, if only one or two EAPDs are found, it's an old chip,
+ * thus it might control over all pins.
+ */
+ spec->pin_eapd_ctrls = spec->num_eapds > 2;
}

static int cx_auto_parse_auto_config(struct hda_codec *codec)
@@ -4023,8 +4023,9 @@ static void cx_auto_init_output(struct hda_codec *codec)
}
}
cx_auto_update_speakers(codec);
- /* turn on/off extra EAPDs, too */
- cx_auto_turn_eapd(codec, spec->num_eapds, spec->eapds, true);
+ /* turn on all EAPDs if no individual EAPD control is available */
+ if (!spec->pin_eapd_ctrls)
+ cx_auto_turn_eapd(codec, spec->num_eapds, spec->eapds, true);
}

static void cx_auto_init_input(struct hda_codec *codec)
--
1.7.7


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