drm/i915: use power domain api to check vga power state

This way we can reuse the check on other platforms too. Also factor out
a version of the function that doesn't check if the power is on, we'll
need to call this from within the power domain framework.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6810041..944c617 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2520,6 +2520,7 @@ extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
 extern void intel_modeset_setup_hw_state(struct drm_device *dev,
                                         bool force_restore);
 extern void i915_redisable_vga(struct drm_device *dev);
+extern void i915_redisable_vga_power_on(struct drm_device *dev);
 extern bool intel_fbc_enabled(struct drm_device *dev);
 extern void intel_disable_fbc(struct drm_device *dev);
 extern bool ironlake_set_drps(struct drm_device *dev, u8 val);

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0a2a986..842b07e 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11232,11 +11232,21 @@ static void intel_sanitize_encoder(struct intel_encoder *encoder)
         * the crtc fixup. */
 }
 
-void i915_redisable_vga(struct drm_device *dev)
+void i915_redisable_vga_power_on(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
        u32 vga_reg = i915_vgacntrl_reg(dev);
 
+       if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
+               DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
+               i915_disable_vga(dev);
+       }
+}
+
+void i915_redisable_vga(struct drm_device *dev)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+
        /* This function can be called both from intel_modeset_setup_hw_state or
         * at a very early point in our resume sequence, where the power well
         * structures are not yet restored. Since this function is at a very
@@ -11244,14 +11254,10 @@ void i915_redisable_vga(struct drm_device *dev)
         * level, just check if the power well is enabled instead of trying to
         * follow the "don't touch the power well if we don't need it" policy
         * the rest of the driver uses. */
-       if ((IS_HASWELL(dev) || IS_BROADWELL(dev)) &&
-           (I915_READ(HSW_PWR_WELL_DRIVER) & HSW_PWR_WELL_STATE_ENABLED) == 0)
+       if (!intel_display_power_enabled(dev_priv, POWER_DOMAIN_VGA))
                return;
 
-       if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
-               DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
-               i915_disable_vga(dev);
-       }
+       i915_redisable_vga_power_on(dev);
 }
 
 static void intel_modeset_readout_hw_state(struct drm_device *dev)