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ALSA: hda - Disable runtime PM when EPSS is unavailable 

According to Mengdong, we shouldn't enable runtime PM when a codec
doesn't support EPSS, based on the experiences on Windows.
We have already this check in HDMI codec drivers, but now apply it in
general in hda_codec.c.

Credit goes to Mengdong Lin <mengdong.lin@intel.com>

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2013-11-26 09:58:46 +01:00
parent b1920c2110
commit 3e9bc58fef
2 changed files with 5 additions and 13 deletions
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7
sound/pci/hda/hda_codec.c
View File

@ -1510,11 +1510,14 @@ int snd_hda_codec_new(struct hda_bus *bus,
#ifdef CONFIG_PM
codec->d3_stop_clk = snd_hda_codec_get_supported_ps(codec, fg,
AC_PWRST_CLKSTOP);
if (!codec->d3_stop_clk)
bus->power_keep_link_on = 1;
#endif
codec->epss = snd_hda_codec_get_supported_ps(codec, fg,
AC_PWRST_EPSS);
#ifdef CONFIG_PM
if (!codec->d3_stop_clk || !codec->epss)
bus->power_keep_link_on = 1;
#endif
/* power-up all before initialization */
hda_set_power_state(codec, AC_PWRST_D0);

11
sound/pci/hda/patch_hdmi.c
View File

@ -1692,17 +1692,6 @@ static int hdmi_parse_codec(struct hda_codec *codec)
}
}
#ifdef CONFIG_PM
/*
* G45/IbexPeak don't support EPSS: the unsolicited pin hot plug event
* can be lost and presence sense verb will become inaccurate if the
* HDA link is powered off at hot plug or hw initialization time.
*/
if (!(snd_hda_param_read(codec, codec->afg, AC_PAR_POWER_STATE) &
AC_PWRST_EPSS))
codec->bus->power_keep_link_on = 1;
#endif
return 0;
}