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ALSA: hda - Keep power link on for PantherPoint HDMI 

On some of the PantherPoint HDMI machines we currently enable, we're seeing
trouble with unsol events, i e detecting monitor presence, especially when
on battery and after suspend/resume.

BugLink: https://bugs.launchpad.net/bugs/1075882
Tested-by: Cyrus Lien <cyrus.lien@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
David Henningsson 2012-11-07 09:22:33 +01:00 committed by Takashi Iwai
parent 4492363251
commit c9adeefda0
1 changed files with 6 additions and 2 deletions
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8
sound/pci/hda/patch_hdmi.c
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@ -1288,13 +1288,17 @@ static int hdmi_parse_codec(struct hda_codec *codec)
} }
} }
#ifdef CONFIG_PM
/* We're seeing some problems with unsolicited hot plug events on
* PantherPoint after S3, if this is not enabled */
if (codec->vendor_id == 0x80862806)
codec->bus->power_keep_link_on = 1;
/* /*
* G45/IbexPeak don't support EPSS: the unsolicited pin hot plug event * G45/IbexPeak don't support EPSS: the unsolicited pin hot plug event
* can be lost and presence sense verb will become inaccurate if the * can be lost and presence sense verb will become inaccurate if the
* HDA link is powered off at hot plug or hw initialization time. * HDA link is powered off at hot plug or hw initialization time.
*/ */
#ifdef CONFIG_PM else if (!(snd_hda_param_read(codec, codec->afg, AC_PAR_POWER_STATE) &
if (!(snd_hda_param_read(codec, codec->afg, AC_PAR_POWER_STATE) &
AC_PWRST_EPSS)) AC_PWRST_EPSS))
codec->bus->power_keep_link_on = 1; codec->bus->power_keep_link_on = 1;
#endif #endif