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ALSA: hda - delayed ELD repoll

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The Intel HDMI chips (ironlake at least) are found to have ~250ms delay
between the ELD_Valid=1 hotplug event is send and the ELD buffer becomes
actually readable. During the time the ELD buffer is mysteriously all 0.

Fix it by scheduling a delayed work to re-read ELD buffer after 300ms.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wu Fengguang 2011-11-16 16:29:47 +08:00 committed by Takashi Iwai
parent b95d68b817
commit 744626dada
1 changed files with 29 additions and 7 deletions
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36
sound/pci/hda/patch_hdmi.c
View file

@ -65,7 +65,10 @@ struct hdmi_spec_per_pin {
hda_nid_t pin_nid;
int num_mux_nids;
hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
struct hda_codec *codec;
struct hdmi_eld sink_eld;
struct delayed_work work;
};
struct hdmi_spec {
@ -745,8 +748,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
* Unsolicited events
*/
static void hdmi_present_sense(struct hda_codec *codec, hda_nid_t pin_nid,
struct hdmi_eld *eld);
static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, bool retry);
static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
{
@ -766,7 +768,7 @@ static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
return;
eld = &spec->pins[pin_idx].sink_eld;
hdmi_present_sense(codec, pin_nid, eld);
hdmi_present_sense(&spec->pins[pin_idx], true);
/*
* HDMI sink's ELD info cannot always be retrieved for now, e.g.
@ -968,9 +970,11 @@ static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx)
return 0;
}
static void hdmi_present_sense(struct hda_codec *codec, hda_nid_t pin_nid,
struct hdmi_eld *eld)
static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, bool retry)
{
struct hda_codec *codec = per_pin->codec;
struct hdmi_eld *eld = &per_pin->sink_eld;
hda_nid_t pin_nid = per_pin->pin_nid;
/*
* Always execute a GetPinSense verb here, even when called from
* hdmi_intrinsic_event; for some NVIDIA HW, the unsolicited
@ -992,13 +996,27 @@ static void hdmi_present_sense(struct hda_codec *codec, hda_nid_t pin_nid,
"HDMI status: Codec=%d Pin=%d Presence_Detect=%d ELD_Valid=%d\n",
codec->addr, pin_nid, eld->monitor_present, eld_valid);
if (eld_valid)
if (eld_valid) {
if (!snd_hdmi_get_eld(eld, codec, pin_nid))
snd_hdmi_show_eld(eld);
else if (retry) {
queue_delayed_work(codec->bus->workq,
&per_pin->work,
msecs_to_jiffies(300));
}
}
snd_hda_input_jack_report(codec, pin_nid);
}
static void hdmi_repoll_eld(struct work_struct *work)
{
struct hdmi_spec_per_pin *per_pin =
container_of(to_delayed_work(work), struct hdmi_spec_per_pin, work);
hdmi_present_sense(per_pin, false);
}
static int hdmi_add_pin(struct hda_codec *codec, hda_nid_t pin_nid)
{
struct hdmi_spec *spec = codec->spec;
@ -1227,7 +1245,7 @@ static int generic_hdmi_build_jack(struct hda_codec *codec, int pin_idx)
if (err < 0)
return err;
hdmi_present_sense(codec, per_pin->pin_nid, &per_pin->sink_eld);
hdmi_present_sense(per_pin, false);
return 0;
}
@ -1278,6 +1296,8 @@ static int generic_hdmi_init(struct hda_codec *codec)
AC_VERB_SET_UNSOLICITED_ENABLE,
AC_USRSP_EN | pin_nid);
per_pin->codec = codec;
INIT_DELAYED_WORK(&per_pin->work, hdmi_repoll_eld);
snd_hda_eld_proc_new(codec, eld, pin_idx);
}
return 0;
@ -1292,10 +1312,12 @@ static void generic_hdmi_free(struct hda_codec *codec)
struct hdmi_spec_per_pin *per_pin = &spec->pins[pin_idx];
struct hdmi_eld *eld = &per_pin->sink_eld;
cancel_delayed_work(&per_pin->work);
snd_hda_eld_proc_free(codec, eld);
}
snd_hda_input_jack_free(codec);
flush_workqueue(codec->bus->workq);
kfree(spec);
}