On Tue, 2014-06-24 at 16:54 +0300, Jani Nikula wrote: > On Mon, 23 Jun 2014, Imre Deak <imre.d...@intel.com> wrote: > > To achieve further power savings during system freeze (aka connected > > standby, or s0ix) we have to send a PCI_D1 opregion notification. As > > the information about the state we're entering (system freeze, > > suspend to ram or suspend to disk) is only available through the ACPI > > subsystem, make this support depend on the relevant kconfig option. > > Things will still work if this option isn't set, albeit with less than > > optimial power saving. > > > > This also fixes a compile breakage when the option is not set introduced > > in > > > > commit e5747e3adcd67ae27105003ec99fb58cba180105 > > Author: Jesse Barnes <jbar...@virtuousgeek.org> > > Date: Thu Jun 12 08:35:47 2014 -0700 > > > > drm/i915: send proper opregion notifications on suspend/resume > > > > Reported-by: Randy Dunlap <rdun...@infradead.org> > > Signed-off-by: Imre Deak <imre.d...@intel.com> > > --- > > drivers/gpu/drm/i915/i915_drv.c | 7 ++++--- > > 1 file changed, 4 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/i915_drv.c > > b/drivers/gpu/drm/i915/i915_drv.c > > index 7ae4e2a..43dc8f7 100644 > > --- a/drivers/gpu/drm/i915/i915_drv.c > > +++ b/drivers/gpu/drm/i915/i915_drv.c > > @@ -544,10 +544,11 @@ static int i915_drm_freeze(struct drm_device *dev) > > > > i915_save_state(dev); > > > > - if (acpi_target_system_state() >= ACPI_STATE_S3) > > - opregion_target_state = PCI_D3cold; > > - else > > + opregion_target_state = PCI_D3cold; > > +#if IS_ENABLED(CONFIG_ACPI_SLEEP) > > Maybe this should just check for CONFIG_ACPI?
I wanted to send the PCI_D1 signal only if we are sure that the target sleep state is S0ix (or S1/2) and fall back to the old behavior to send PCI_D3cold in all other cases. But you are right, it would make much sense if CONFIG_ACPI_SLEEP=n the target state would be always S0ix. Rafael could you confirm this? --Imre > > BR, > Jani. > > > + if (acpi_target_system_state() < ACPI_STATE_S3) > > opregion_target_state = PCI_D1; > > +#endif > > intel_opregion_notify_adapter(dev, opregion_target_state); > > > > intel_uncore_forcewake_reset(dev, false); > > -- > > 1.8.4 > > > > _______________________________________________ > > Intel-gfx mailing list > > Intel-gfx@lists.freedesktop.org > > http://lists.freedesktop.org/mailman/listinfo/intel-gfx >
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