From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755172Ab1KPIjM (ORCPT ); Wed, 16 Nov 2011 03:39:12 -0500 Received: from mga02.intel.com ([134.134.136.20]:12240 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754798Ab1KPIjK (ORCPT ); Wed, 16 Nov 2011 03:39:10 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,352,1309762800"; d="scan'208";a="76209629" Message-Id: <20111116083514.568265053@intel.com> User-Agent: quilt/0.48-1 Date: Wed, 16 Nov 2011 16:29:47 +0800 From: Wu Fengguang To: Takashi Iwai cc: , Wu Fengguang Cc: LKML Subject: [PATCH 2/3] hda - delayed ELD repoll References: <20111116082945.414733231@intel.com> Content-Disposition: inline; filename=eld-delayed-work Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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); }