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authorTakashi Iwai <tiwai@suse.de>2018-12-08 19:31:49 +0300
committerTakashi Iwai <tiwai@suse.de>2018-12-11 10:06:55 +0300
commit029d92c289bdad08ed08e61bf31b17cdc9ee61cf (patch)
treeaaccdd1b5f6aefc45c9406def67b6d142deeba0b /include/sound/hdaudio.h
parent3baffc4a84d759ba54c461e8e4583bd8890c749a (diff)
downloadlinux-029d92c289bdad08ed08e61bf31b17cdc9ee61cf.tar.xz
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 <tiwai@suse.de>
Diffstat (limited to 'include/sound/hdaudio.h')
-rw-r--r--include/sound/hdaudio.h7
1 files changed, 2 insertions, 5 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index cd1773d0e08f..940e2b282133 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -79,7 +79,6 @@ struct hdac_device {
/* misc flags */
atomic_t in_pm; /* suspend/resume being performed */
- bool link_power_control:1;
/* sysfs */
struct hdac_widget_tree *widgets;
@@ -237,8 +236,6 @@ struct hdac_bus_ops {
/* get a response from the last command */
int (*get_response)(struct hdac_bus *bus, unsigned int addr,
unsigned int *res);
- /* control the link power */
- int (*link_power)(struct hdac_bus *bus, bool enable);
};
/*
@@ -363,7 +360,8 @@ struct hdac_bus {
/* DRM component interface */
struct drm_audio_component *audio_component;
- int drm_power_refcount;
+ long display_power_status;
+ bool display_power_active;
/* parameters required for enhanced capabilities */
int num_streams;
@@ -404,7 +402,6 @@ int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
unsigned int *res);
int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
-int snd_hdac_link_power(struct hdac_device *codec, bool enable);
bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
void snd_hdac_bus_stop_chip(struct hdac_bus *bus);