From 057d3860613813b2e8507bb932f9a523ad2cca2f Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Sat, 1 Sep 2012 22:59:49 -0700 Subject: [PATCH] drm/i915: Change forcewake timeout to 2ms A designer familiar with the hardware has stated that the forcewake timeout can theoretically be as high as a little over 1ms. Therefore we modify our code to use 2ms (appropriate fudge and because we don't want to round down). Hopefully this can't prevent spurious timeouts. Signed-off-by: Ben Widawsky Acked-by: Chris Wilson [danvet: again fix conflict with vlv patch.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index fd8d37f97a4..31e47387ab9 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -31,7 +31,7 @@ #include "../../../platform/x86/intel_ips.h" #include -#define FORCEWAKE_ACK_TIMEOUT_US 500 +#define FORCEWAKE_ACK_TIMEOUT_MS 2 /* FBC, or Frame Buffer Compression, is a technique employed to compress the * framebuffer contents in-memory, aiming at reducing the required bandwidth @@ -3964,15 +3964,15 @@ 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, - FORCEWAKE_ACK_TIMEOUT_US)) + if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, + FORCEWAKE_ACK_TIMEOUT_MS)) DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); I915_WRITE_NOTRACE(FORCEWAKE, 1); POSTING_READ(FORCEWAKE); - if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1), - FORCEWAKE_ACK_TIMEOUT_US)) + if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1), + FORCEWAKE_ACK_TIMEOUT_MS)) DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); __gen6_gt_wait_for_thread_c0(dev_priv); @@ -3987,15 +3987,15 @@ 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, - FORCEWAKE_ACK_TIMEOUT_US)) + if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, + FORCEWAKE_ACK_TIMEOUT_MS)) DRM_ERROR("Timed out waiting for forcewake old ack to clear.\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), - FORCEWAKE_ACK_TIMEOUT_US)) + if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1), + FORCEWAKE_ACK_TIMEOUT_MS)) DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); __gen6_gt_wait_for_thread_c0(dev_priv); @@ -4075,14 +4075,14 @@ int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) static void vlv_force_wake_get(struct drm_i915_private *dev_priv) { - if (wait_for_atomic_us((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1) == 0, - FORCEWAKE_ACK_TIMEOUT_US)) + if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1) == 0, + FORCEWAKE_ACK_TIMEOUT_MS)) DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(1)); - if (wait_for_atomic_us((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1), - FORCEWAKE_ACK_TIMEOUT_US)) + if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1), + FORCEWAKE_ACK_TIMEOUT_MS)) DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); __gen6_gt_wait_for_thread_c0(dev_priv); -- 2.20.1