blob: 3ef4e68bc135f4580a75b3b2fa163fffa770cab1 [file] [log] [blame]
From 4188f7fd56a994bf3a12eeacfe265c2ecc0925b3 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Fri, 30 Aug 2013 19:40:31 +0300
Subject: drm/i915: add opregion function to notify bios of adapter power state
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>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit ecbc5cf34068d22cf57bac596809a346576c38a3)
Signed-off-by: Darren Hart <dvhart@linux.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 3b7368d6d72b..769c1388a69e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2197,6 +2197,8 @@ 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; }
@@ -2206,6 +2208,11 @@ 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 ce1c79eedcb1..2ff74912b656 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;
--
1.8.5.rc3