On Wed, Nov 16, 2011 at 01:10:37AM +0800, Takashi Iwai wrote:
> At Wed, 16 Nov 2011 00:57:08 +0800,
> Wu Fengguang wrote:
> > +static void hda_eld_work(struct work_struct *work)
> > +{
> > + struct hdmi_eld *eld = container_of(
> > + container_of(work, struct delayed_work, work),
> > + struct hdmi_eld, work);
>
> Ugh, hardly to read. Slightly better to use to_delayed_work()?
>
> struct hdmi_eld *eld = container_of(to_delayed_work(work),
> struct hdmi_eld, work);
Yeah that looks much better! Changed to:
+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);
+}
> > + struct hdmi_spec_per_pin *per_pin =
> > + container_of(eld, struct hdmi_spec_per_pin, sink_eld);
> > + struct hda_codec *codec = eld->codec;
> > +
> > + hdmi_present_sense(codec, per_pin->pin_nid, eld, 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(struc
> > if (err < 0)
> > return err;
> >
> > - hdmi_present_sense(codec, per_pin->pin_nid, &per_pin->sink_eld);
> > + hdmi_present_sense(codec, per_pin->pin_nid, &per_pin->sink_eld, false);
> ...
>
> Looking through the code, I wonder how about keeping work and codec
> pointer in struct hdmi_spec_per_pin instead of struct hdmi_eld. Then
> we don't need to expose it in hda_local.h, and changes would be
> slightly more compact.
>
> hdmi_present_sense() can be modified to receive hdmi_sepc_per_pin*
> directly instead of individual nid and eld pointer.
Good idea! With the changes I get a much smaller patch :-)
I'll repost the patch series after some more testing.
Thanks,
Fengguang
---
Subject: hda - delayed ELD repoll
Date: Mon Nov 14 11:31:00 CST 2011
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 at intel.com>
---
sound/pci/hda/patch_hdmi.c | 36 ++++++++++++++++++++++++++++-------
1 file changed, 29 insertions(+), 7 deletions(-)
--- linux.orig/sound/pci/hda/patch_hdmi.c 2011-11-16 09:53:01.000000000 +0800
+++ linux/sound/pci/hda/patch_hdmi.c 2011-11-16 10:33:06.000000000 +0800
@@ -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(s
* 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
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
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 hd
"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(struc
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_
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
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);
}
