i915: reprogram power monitoring registers on resume

commit 48fcfc888b48ad49dd83faa107264bbfb0089cad upstream.

Fixes issue where i915_gfx_val was reporting values several
orders of magnitude higher than physically possible (without
leaving scorch marks on my thighs at least.)

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 31f08581e93a46dbdc2ca1cfa563faec31e9ffc5..2df5b9aadd5b858dba5554d720ab448b6edf7dd2 100644 (file)
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -862,8 +862,10 @@ int i915_restore_state(struct drm_device *dev)
        /* Clock gating state */
        intel_init_clock_gating(dev);
 
-       if (HAS_PCH_SPLIT(dev))
+       if (HAS_PCH_SPLIT(dev)) {
                ironlake_enable_drps(dev);
+               intel_init_emon(dev);
+       }
 
        /* Cache mode state */
        I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 8828b3ac6414eabff93134e34a41ae5c38d1cd34..2b161375a38db91dd86a8e606c9076247d7f8a01 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -250,6 +250,7 @@ extern void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 extern void intel_init_clock_gating(struct drm_device *dev);
 extern void ironlake_enable_drps(struct drm_device *dev);
 extern void ironlake_disable_drps(struct drm_device *dev);
+extern void intel_init_emon(struct drm_device *dev);
 
 extern int intel_pin_and_fence_fb_obj(struct drm_device *dev,
                                      struct drm_gem_object *obj);