[Intel-gfx] [PATCH 3/9] drm/i915: support Haswell force waking

[Eugeni Dodonov]

There is a different ACK register for force wake on Haswell, so account
for that.

Signed-off-by: Eugeni Dodonov <eugeni.dodonov at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 7 +++++++
 drivers/gpu/drm/i915/i915_reg.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a4ea4a9..d7c3373 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -464,6 +464,13 @@ static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
 
 static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
 {
+	u32 forcewake_ack;
+
+	if (IS_HASWELL(dev_priv->dev))
+		forcewake_ack = FORCEWAKE_ACK_HSW;
+	else
+		forcewake_ack = FORCEWAKE_MT_ACK;
+
 	if (wait_for_atomic_us((I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1) == 0, 500))
 		DRM_ERROR("Force wake wait timed out\n");
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 20f7f0d..f17de3d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4095,6 +4095,7 @@
 #define  FORCEWAKE				0xA18C
 #define  FORCEWAKE_VLV				0x1300b0
 #define  FORCEWAKE_ACK_VLV			0x1300b4
+#define  FORCEWAKE_ACK_HSW			0x130044
 #define  FORCEWAKE_ACK				0x130090
 #define  FORCEWAKE_MT				0xa188 /* multi-threaded */
 #define  FORCEWAKE_MT_ACK			0x130040
-- 
1.7.11.1