ValleyView handles force wake differently than previous chipsets, so add
a couple of new functions for it. But leave it disabled by default
until we test it (need a chip with the Punit enabled first).
Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_drv.c | 28 +++++++++++++++++++++++++++-
drivers/gpu/drm/i915/i915_drv.h | 3 +++
drivers/gpu/drm/i915/i915_reg.h | 2 ++
drivers/gpu/drm/i915/intel_display.c | 2 ++
4 files changed, 34 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 4a0e415..3eac9b6 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -459,6 +459,31 @@ int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
return ret;
}
+void vlv_force_wake_get(struct drm_i915_private *dev_priv)
+{
+ int count;
+
+ count = 0;
+
+ /* Already awake? */
+ if ((I915_READ(0x130094) & 0xa1) == 0xa1)
+ return;
+
+ I915_WRITE_NOTRACE(FORCEWAKE_VLV, 0xffffffff);
+ POSTING_READ(FORCEWAKE_VLV);
+
+ count = 0;
+ while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1) == 0)
+ udelay(10);
+}
+
+void vlv_force_wake_put(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE_NOTRACE(FORCEWAKE_VLV, 0xffff0000);
+ /* FIXME: confirm VLV behavior with Punit folks */
+ POSTING_READ(FORCEWAKE_VLV);
+}
+
static int i915_drm_freeze(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1001,7 +1026,8 @@ MODULE_LICENSE("GPL and additional rights");
#define NEEDS_FORCE_WAKE(dev_priv, reg) \
(((dev_priv)->info->gen >= 6) && \
((reg) < 0x40000) && \
- ((reg) != FORCEWAKE))
+ ((reg) != FORCEWAKE)) && \
+ (!IS_VALLEYVIEW((dev_priv)->dev))
#define __i915_read(x, y) \
u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2b8b32d..178a955 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1394,6 +1394,9 @@ extern void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv);
extern void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv);
extern void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv);
+extern void vlv_force_wake_get(struct drm_i915_private *dev_priv);
+extern void vlv_force_wake_put(struct drm_i915_private *dev_priv);
+
/* overlay */
#ifdef CONFIG_DEBUG_FS
extern struct intel_overlay_error_state *intel_overlay_capture_error_state(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d11540a..771e7150 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3882,6 +3882,8 @@
#define EDP_LINK_TRAIN_VOL_EMP_MASK_IVB (0x3f<<22)
#define FORCEWAKE 0xA18C
+#define FORCEWAKE_VLV 0x1300b0
+#define FORCEWAKE_ACK_VLV 0x1300b4
#define FORCEWAKE_ACK 0x130090
#define FORCEWAKE_MT 0xa188 /* multi-threaded */
#define FORCEWAKE_MT_ACK 0x130040
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4b5905c..3f55f68 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9457,6 +9457,8 @@ static void intel_init_display(struct drm_device *dev)
dev_priv->display.update_wm = valleyview_update_wm;
dev_priv->display.init_clock_gating =
valleyview_init_clock_gating;
+ dev_priv->display.force_wake_get = vlv_force_wake_get;
+ dev_priv->display.force_wake_put = vlv_force_wake_put;
} else if (IS_PINEVIEW(dev)) {
if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
dev_priv->is_ddr3,
--
1.7.5.4
