intelhdmi - dont power off HDA link
For codecs without EPSS support (G45/IbexPeak), the hotplug event will be lost if the HDA is powered off during the time. After that the pin presence detection verb returns inaccurate info. So always power-on HDA link for !EPSS codecs. KarL offers the fact and Takashi recommends to flag hda_bus. Thanks! Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -639,6 +639,7 @@ struct hda_bus {
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unsigned int rirb_error:1; /* error in codec communication */
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unsigned int response_reset:1; /* controller was reset */
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unsigned int in_reset:1; /* during reset operation */
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unsigned int power_keep_link_on:1; /* don't power off HDA link */
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};
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/*
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@ -2082,7 +2082,8 @@ static void azx_power_notify(struct hda_bus *bus)
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}
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if (power_on)
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azx_init_chip(chip);
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else if (chip->running && power_save_controller)
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else if (chip->running && power_save_controller &&
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!bus->power_keep_link_on)
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azx_stop_chip(chip);
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}
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#endif /* CONFIG_SND_HDA_POWER_SAVE */
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@ -391,6 +391,17 @@ static int intel_hdmi_parse_codec(struct hda_codec *codec)
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}
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}
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/*
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* G45/IbexPeak don't support EPSS: the unsolicited pin hot plug event
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* can be lost and presence sense verb will become inaccurate if the
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* HDA link is powered off at hot plug or hw initialization time.
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*/
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#ifdef CONFIG_SND_HDA_POWER_SAVE
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if (!(snd_hda_param_read(codec, codec->afg, AC_PAR_POWER_STATE) &
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AC_PWRST_EPSS))
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codec->bus->power_keep_link_on = 1;
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#endif
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return 0;
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}
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