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/pci/hda/hda_controller.c | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'sound/pci/hda/hda_controller.c') diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c index fe2506672a72..532e081f8b8a 100644 --- a/sound/pci/hda/hda_controller.c +++ b/sound/pci/hda/hda_controller.c @@ -989,20 +989,9 @@ static int azx_get_response(struct hdac_bus *bus, unsigned int addr, return azx_rirb_get_response(bus, addr, res); } -static int azx_link_power(struct hdac_bus *bus, bool enable) -{ - struct azx *chip = bus_to_azx(bus); - - if (chip->ops->link_power) - return chip->ops->link_power(chip, enable); - else - return -EINVAL; -} - static const struct hdac_bus_ops bus_core_ops = { .command = azx_send_cmd, .get_response = azx_get_response, - .link_power = azx_link_power, }; #ifdef CONFIG_SND_HDA_DSP_LOADER -- cgit v1.2.3