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| author | Lu, Han <han.lu@intel.com> | 2015-05-05 09:05:47 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-05-05 14:44:19 +0200 |
| commit | 632f3ab95fe2ffebf09969a57ab21be409ed7dcc (patch) | |
| tree | 0db6c403b6d893bb1e831397df5fa48bc65171b4 /drivers/gpu/drm/i915/i915_reg.h | |
| parent | bd5b2d440745707ee97159ed7a06b629760fd19b (diff) | |
| download | lwn-632f3ab95fe2ffebf09969a57ab21be409ed7dcc.tar.gz lwn-632f3ab95fe2ffebf09969a57ab21be409ed7dcc.zip | |
drm/i915/audio: add codec wakeup override enabled/disable callback
Add support for enabling codec wakeup override signal to allow
re-enumeration of the controller on SKL after resume from low power state.
In SKL, HDMI/DP codec and PCH HD Audio Controller are in different power
wells, so it's necessary to reset display audio codecs when power well on,
otherwise display audio codecs will disappear when resume from low power
state.
Reset steps when power on:
enable codec wakeup -> azx_init_chip() -> disable codec wakeup
v3 by Jani: Simplify to only support toggling the appropriate chicken bit.
v4 by Han: add explanation and specify the hw swquence.
Signed-off-by: Lu, Han <han.lu@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3da1af46625c..7d88f4f51594 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6477,6 +6477,9 @@ enum skl_disp_power_wells { #define AUDIO_CP_READY(trans) ((1 << 1) << ((trans) * 4)) #define AUDIO_ELD_VALID(trans) ((1 << 0) << ((trans) * 4)) +#define HSW_AUD_CHICKENBIT 0x65f10 +#define SKL_AUD_CODEC_WAKE_SIGNAL (1 << 15) + /* HSW Power Wells */ #define HSW_PWR_WELL_BIOS 0x45400 /* CTL1 */ #define HSW_PWR_WELL_DRIVER 0x45404 /* CTL2 */ |