Message ID | 474394981c3f49faf218dd64a0ac87f84c504d8f.1377880296.git.jani.nikula@intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
2013/8/30 Jani Nikula <jani.nikula@intel.com>: > Notifying the bios lets it enter power saving states. > > Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> > --- > drivers/gpu/drm/i915/i915_drv.h | 7 +++++++ > drivers/gpu/drm/i915/intel_opregion.c | 27 +++++++++++++++++++++++++++ > 2 files changed, 34 insertions(+) > > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h > index 5339297..7daae2a 100644 > --- a/drivers/gpu/drm/i915/i915_drv.h > +++ b/drivers/gpu/drm/i915/i915_drv.h > @@ -2190,6 +2190,8 @@ extern void intel_opregion_fini(struct drm_device *dev); > extern void intel_opregion_asle_intr(struct drm_device *dev); > extern int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, > bool enable); > +extern int intel_opregion_notify_adapter(struct drm_device *dev, > + pci_power_t state); > #else > static inline void intel_opregion_init(struct drm_device *dev) { return; } > static inline void intel_opregion_fini(struct drm_device *dev) { return; } > @@ -2199,6 +2201,11 @@ intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, bool enable) > { > return 0; > } > +static inline int > +intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) > +{ > + return 0; > +} > #endif > > /* intel_acpi.c */ > diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c > index 791991b..05243df 100644 > --- a/drivers/gpu/drm/i915/intel_opregion.c > +++ b/drivers/gpu/drm/i915/intel_opregion.c > @@ -342,6 +342,33 @@ int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, > return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); > } > > +static const struct { > + pci_power_t pci_power_state; > + u32 parm; > +} power_state_map[] = { > + { PCI_D0, 0x00 }, > + { PCI_D1, 0x01 }, > + { PCI_D2, 0x02 }, > + { PCI_D3hot, 0x04 }, > + { PCI_D3cold, 0x04 }, > +}; > + > +int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) > +{ > + int i; > + > + if (!HAS_DDI(dev)) > + return 0; > + > + for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { > + if (state == power_state_map[i].pci_power_state) > + return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE, > + power_state_map[i].parm, NULL); > + } > + > + return -EINVAL; > +} > + > static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) > { > struct drm_i915_private *dev_priv = dev->dev_private; > -- > 1.7.10.4 >
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 5339297..7daae2a 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2190,6 +2190,8 @@ extern void intel_opregion_fini(struct drm_device *dev); extern void intel_opregion_asle_intr(struct drm_device *dev); extern int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, bool enable); +extern int intel_opregion_notify_adapter(struct drm_device *dev, + pci_power_t state); #else static inline void intel_opregion_init(struct drm_device *dev) { return; } static inline void intel_opregion_fini(struct drm_device *dev) { return; } @@ -2199,6 +2201,11 @@ intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, bool enable) { return 0; } +static inline int +intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) +{ + return 0; +} #endif /* intel_acpi.c */ diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 791991b..05243df 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -342,6 +342,33 @@ int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); } +static const struct { + pci_power_t pci_power_state; + u32 parm; +} power_state_map[] = { + { PCI_D0, 0x00 }, + { PCI_D1, 0x01 }, + { PCI_D2, 0x02 }, + { PCI_D3hot, 0x04 }, + { PCI_D3cold, 0x04 }, +}; + +int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) +{ + int i; + + if (!HAS_DDI(dev)) + return 0; + + for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { + if (state == power_state_map[i].pci_power_state) + return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE, + power_state_map[i].parm, NULL); + } + + return -EINVAL; +} + static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) { struct drm_i915_private *dev_priv = dev->dev_private;
Notifying the bios lets it enter power saving states. Signed-off-by: Jani Nikula <jani.nikula@intel.com> --- drivers/gpu/drm/i915/i915_drv.h | 7 +++++++ drivers/gpu/drm/i915/intel_opregion.c | 27 +++++++++++++++++++++++++++ 2 files changed, 34 insertions(+)