From 9500986159d9017f9277f9e42a1f9b13b5e0e666 Mon Sep 17 00:00:00 2001 From: Mika Kuoppala Date: Wed, 5 Nov 2014 17:30:52 +0200 Subject: [PATCH] Revert "drm/i915/vlv: Remove check for Old Ack during forcewake" MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This reverts commit 5cb13c07dae73380d8b3ddc792740487b8742938. While the relevance for WaRsDontPollForAckOnClearingFWBits is under investigation, revert this as regression. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85684 Tested-by: Tested-by: lu hua Cc: Chris Wilson Cc: Ville Syrjälä Cc: S, Deepak Signed-off-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_uncore.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 68e722b780a1..6a0c3fb2cbf0 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -194,15 +194,13 @@ static void vlv_force_wake_reset(struct drm_i915_private *dev_priv) static void __vlv_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine) { - /* - * WaRsDontPollForAckOnClearingFWBits:vlv - * Hardware clears ack bits lazily (only when all ack - * bits become 0) so don't poll for individiual ack - * bits to be clear here like on other platforms. - */ - /* Check for Render Engine */ if (FORCEWAKE_RENDER & fw_engine) { + if (wait_for_atomic((__raw_i915_read32(dev_priv, + FORCEWAKE_ACK_VLV) & + FORCEWAKE_KERNEL) == 0, + FORCEWAKE_ACK_TIMEOUT_MS)) + DRM_ERROR("Timed out: Render forcewake old ack to clear.\n"); __raw_i915_write32(dev_priv, FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); @@ -216,6 +214,11 @@ static void __vlv_force_wake_get(struct drm_i915_private *dev_priv, /* Check for Media Engine */ if (FORCEWAKE_MEDIA & fw_engine) { + if (wait_for_atomic((__raw_i915_read32(dev_priv, + FORCEWAKE_ACK_MEDIA_VLV) & + FORCEWAKE_KERNEL) == 0, + FORCEWAKE_ACK_TIMEOUT_MS)) + DRM_ERROR("Timed out: Media forcewake old ack to clear.\n"); __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); -- 2.39.5