[Intel-gfx] [PATCH 1/3] drm/i915: Extract forcewake ack timeout

[Ben Widawsky]

It's used all over the place, and we want to be able to play around with
the value, apparently. Note that it doesn't touch other timeouts of the
same value (like gtfifo, and thread C0 wait).

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/intel_pm.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index c0721ff..f42c142 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -31,6 +31,8 @@
 #include "../../../platform/x86/intel_ips.h"
 #include <linux/module.h>
 
+#define FORCEWAKE_ACK_TIMEOUT_US 500
+
 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
  * framebuffer contents in-memory, aiming at reducing the required bandwidth
  * during in-memory transfers and, therefore, reduce the power packet.
@@ -3968,13 +3970,15 @@ static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
 	else
 		forcewake_ack = FORCEWAKE_ACK;
 
-	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, 500))
+	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1) == 0,
+			       FORCEWAKE_ACK_TIMEOUT_US))
 		DRM_ERROR("Force wake wait timed out\n");
 
 	I915_WRITE_NOTRACE(FORCEWAKE, 1);
 	POSTING_READ(FORCEWAKE);
 
-	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1), 500))
+	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1),
+			       FORCEWAKE_ACK_TIMEOUT_US))
 		DRM_ERROR("Force wake wait timed out\n");
 
 	__gen6_gt_wait_for_thread_c0(dev_priv);
@@ -3989,13 +3993,15 @@ static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
 	else
 		forcewake_ack = FORCEWAKE_MT_ACK;
 
-	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, 500))
+	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1) == 0,
+			       FORCEWAKE_ACK_TIMEOUT_US))
 		DRM_ERROR("Force wake wait timed out\n");
 
 	I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(1));
 	POSTING_READ(FORCEWAKE_MT);
 
-	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1), 500))
+	if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1),
+			       FORCEWAKE_ACK_TIMEOUT_US))
 		DRM_ERROR("Force wake wait timed out\n");
 
 	__gen6_gt_wait_for_thread_c0(dev_priv);
@@ -4082,7 +4088,8 @@ static void vlv_force_wake_get(struct drm_i915_private *dev_priv)
 	I915_WRITE_NOTRACE(FORCEWAKE_VLV, 0xffffffff);
 	POSTING_READ(FORCEWAKE_VLV);
 
-	if (wait_for_atomic_us((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1), 500))
+	if (wait_for_atomic_us((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1),
+			       FORCEWAKE_ACK_TIMEOUT_US))
 		DRM_ERROR("Force wake wait timed out\n");
 
 	__gen6_gt_wait_for_thread_c0(dev_priv);
-- 
1.7.12