From 029d92c289bdad08ed08e61bf31b17cdc9ee61cf Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sat, 8 Dec 2018 17:31:49 +0100 Subject: ALSA: hda: Refactor display power management The current HD-audio code manages the DRM audio power via too complex redirections, and this seems even still unbalanced in a corner case as Intel DRM CI has been intermittently reporting. This patch is a big surgery for addressing the complexity and the possible unbalance. Basically the patch changes the display PM in the following ways: - Both HD-audio controller and codec drivers call a single helper, snd_hdac_display_power(). (Formerly, the display power control from a codec was done indirectly via link_power bus ops.) - snd_hdac_display_power() receives the codec address index. For turning on/off from the controller, pass HDA_CODEC_IDX_CONTROLLER. - snd_hdac_display_power() doesn't manage refcounts any longer, but keeps the power status in bitmap. If any of controller or codecs is turned on, the function updates the DRM power state via get_power() or put_power(). Also this refactor allows us more cleanup: - The link_power bus ops is dropped, so there is no longer indirect management, as mentioned in the above. - hdac_device link_power_control flag is moved to hda_codec display_power_control flag, as it's only for HDA legacy. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106525 Signed-off-by: Takashi Iwai --- sound/hda/hdac_device.c | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'sound/hda/hdac_device.c') diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index dbf02a3a8d2f..95b073ee4b32 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -622,23 +622,6 @@ int snd_hdac_power_down_pm(struct hdac_device *codec) EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); #endif -/** - * snd_hdac_link_power - Enable/disable the link power for a codec - * @codec: the codec object - * @bool: enable or disable the link power - */ -int snd_hdac_link_power(struct hdac_device *codec, bool enable) -{ - if (!codec->link_power_control) - return 0; - - if (codec->bus->ops->link_power) - return codec->bus->ops->link_power(codec->bus, enable); - else - return -EINVAL; -} -EXPORT_SYMBOL_GPL(snd_hdac_link_power); - /* codec vendor labels */ struct hda_vendor_id { unsigned int id; -- cgit 1.4.1