Linux v4.14-rc4-84-gff5abbe799e2
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Justin M. Forbes
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drm-i915-Boost-GPU-clocks-if-we-miss-the-pageflip-s-vblank.patch
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drm-i915-Boost-GPU-clocks-if-we-miss-the-pageflip-s-vblank.patch
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From patchwork Thu Aug 17 12:37:06 2017
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit
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Subject: drm/i915: Boost GPU clocks if we miss the pageflip's vblank
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From: Chris Wilson <chris@chris-wilson.co.uk>
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X-Patchwork-Id: 172204
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Message-Id: <20170817123706.6777-1-chris@chris-wilson.co.uk>
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To: intel-gfx@lists.freedesktop.org
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Cc: Daniel Vetter <daniel.vetter@intel.com>
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Date: Thu, 17 Aug 2017 13:37:06 +0100
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If we miss the current vblank because the gpu was busy, that may cause a
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jitter as the frame rate temporarily drops. We try to limit the impact
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of this by then boosting the GPU clock to deliver the frame as quickly
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as possible. Originally done in commit 6ad790c0f5ac ("drm/i915: Boost GPU
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frequency if we detect outstanding pageflips") but was never forward
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ported to atomic and finally dropped in commit fd3a40242e87 ("drm/i915:
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Rip out legacy page_flip completion/irq handling").
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References: https://bugs.freedesktop.org/show_bug.cgi?id=102199
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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
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Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
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Cc: Daniel Vetter <daniel.vetter@intel.com>
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Tested-by: Lyude Paul <lyude@redhat.com>
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Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
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---
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drivers/gpu/drm/i915/intel_display.c | 59 ++++++++++++++++++++++++++++++++++++
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drivers/gpu/drm/i915/intel_drv.h | 1 -
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drivers/gpu/drm/i915/intel_pm.c | 42 ++-----------------------
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3 files changed, 62 insertions(+), 40 deletions(-)
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diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
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index 0e93ec201fe3..7d5b19553637 100644
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--- a/drivers/gpu/drm/i915/intel_display.c
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+++ b/drivers/gpu/drm/i915/intel_display.c
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@@ -12636,6 +12636,55 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
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.set_crc_source = intel_crtc_set_crc_source,
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};
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+struct wait_rps_boost {
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+ struct wait_queue_entry wait;
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+
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+ struct drm_crtc *crtc;
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+ struct drm_i915_gem_request *request;
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+};
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+
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+static int do_rps_boost(struct wait_queue_entry *_wait,
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+ unsigned mode, int sync, void *key)
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+{
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+ struct wait_rps_boost *wait = container_of(_wait, typeof(*wait), wait);
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+ struct drm_i915_gem_request *rq = wait->request;
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+
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+ gen6_rps_boost(rq, NULL);
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+ i915_gem_request_put(rq);
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+
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+ drm_crtc_vblank_put(wait->crtc);
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+
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+ list_del(&wait->wait.entry);
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+ kfree(wait);
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+ return 1;
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+}
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+
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+static void add_rps_boost_after_vblank(struct drm_crtc *crtc,
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+ struct dma_fence *fence)
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+{
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+ struct wait_rps_boost *wait;
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+
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+ if (!dma_fence_is_i915(fence))
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+ return;
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+
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+ if (drm_crtc_vblank_get(crtc))
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+ return;
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+
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+ wait = kmalloc(sizeof(*wait), GFP_KERNEL);
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+ if (!wait) {
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+ drm_crtc_vblank_put(crtc);
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+ return;
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+ }
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+
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+ wait->request = to_request(dma_fence_get(fence));
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+ wait->crtc = crtc;
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+
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+ wait->wait.func = do_rps_boost;
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+ wait->wait.flags = 0;
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+
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+ add_wait_queue(drm_crtc_vblank_waitqueue(crtc), &wait->wait);
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+}
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+
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/**
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* intel_prepare_plane_fb - Prepare fb for usage on plane
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* @plane: drm plane to prepare for
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@@ -12733,12 +12782,22 @@ intel_prepare_plane_fb(struct drm_plane *plane,
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return ret;
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if (!new_state->fence) { /* implicit fencing */
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+ struct dma_fence *fence;
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+
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ret = i915_sw_fence_await_reservation(&intel_state->commit_ready,
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obj->resv, NULL,
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false, I915_FENCE_TIMEOUT,
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GFP_KERNEL);
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if (ret < 0)
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return ret;
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+
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+ fence = reservation_object_get_excl_rcu(obj->resv);
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+ if (fence) {
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+ add_rps_boost_after_vblank(new_state->crtc, fence);
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+ dma_fence_put(fence);
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+ }
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+ } else {
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+ add_rps_boost_after_vblank(new_state->crtc, new_state->fence);
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}
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return 0;
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diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
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index fa47285918f4..e092354b4d63 100644
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--- a/drivers/gpu/drm/i915/intel_drv.h
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+++ b/drivers/gpu/drm/i915/intel_drv.h
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@@ -1844,7 +1844,6 @@ void gen6_rps_reset_ei(struct drm_i915_private *dev_priv);
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void gen6_rps_idle(struct drm_i915_private *dev_priv);
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void gen6_rps_boost(struct drm_i915_gem_request *rq,
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struct intel_rps_client *rps);
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-void intel_queue_rps_boost_for_request(struct drm_i915_gem_request *req);
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void g4x_wm_get_hw_state(struct drm_device *dev);
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void vlv_wm_get_hw_state(struct drm_device *dev);
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void ilk_wm_get_hw_state(struct drm_device *dev);
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diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
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index ed662937ec3c..c9fa2eb1903c 100644
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--- a/drivers/gpu/drm/i915/intel_pm.c
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+++ b/drivers/gpu/drm/i915/intel_pm.c
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@@ -6169,6 +6169,7 @@ void gen6_rps_boost(struct drm_i915_gem_request *rq,
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struct intel_rps_client *rps)
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{
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struct drm_i915_private *i915 = rq->i915;
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+ unsigned long flags;
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bool boost;
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/* This is intentionally racy! We peek at the state here, then
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@@ -6178,13 +6179,13 @@ void gen6_rps_boost(struct drm_i915_gem_request *rq,
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return;
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boost = false;
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- spin_lock_irq(&rq->lock);
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+ spin_lock_irqsave(&rq->lock, flags);
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if (!rq->waitboost && !i915_gem_request_completed(rq)) {
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atomic_inc(&i915->rps.num_waiters);
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rq->waitboost = true;
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boost = true;
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}
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- spin_unlock_irq(&rq->lock);
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+ spin_unlock_irqrestore(&rq->lock, flags);
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if (!boost)
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return;
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@@ -9132,43 +9133,6 @@ int intel_freq_opcode(struct drm_i915_private *dev_priv, int val)
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return DIV_ROUND_CLOSEST(val, GT_FREQUENCY_MULTIPLIER);
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}
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-struct request_boost {
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- struct work_struct work;
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- struct drm_i915_gem_request *req;
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-};
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-
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-static void __intel_rps_boost_work(struct work_struct *work)
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-{
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- struct request_boost *boost = container_of(work, struct request_boost, work);
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- struct drm_i915_gem_request *req = boost->req;
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-
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- if (!i915_gem_request_completed(req))
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- gen6_rps_boost(req, NULL);
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-
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- i915_gem_request_put(req);
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- kfree(boost);
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-}
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-
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-void intel_queue_rps_boost_for_request(struct drm_i915_gem_request *req)
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-{
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- struct request_boost *boost;
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-
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- if (req == NULL || INTEL_GEN(req->i915) < 6)
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- return;
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-
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- if (i915_gem_request_completed(req))
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- return;
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-
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- boost = kmalloc(sizeof(*boost), GFP_ATOMIC);
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- if (boost == NULL)
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- return;
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-
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- boost->req = i915_gem_request_get(req);
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-
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- INIT_WORK(&boost->work, __intel_rps_boost_work);
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- queue_work(req->i915->wq, &boost->work);
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-}
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-
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void intel_pm_setup(struct drm_i915_private *dev_priv)
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{
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mutex_init(&dev_priv->rps.hw_lock);
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2
gitrev
2
gitrev
@ -1 +1 @@
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56ae414e9d2718bcbfda9ba3797c39005e2f90fb
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ff5abbe799e29099695cb8b5b2f198dd8b8bdf26
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@ -69,7 +69,7 @@ Summary: The Linux kernel
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# The rc snapshot level
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%global rcrev 4
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# The git snapshot level
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%define gitrev 2
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%define gitrev 3
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# Set rpm version accordingly
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%define rpmversion 4.%{upstream_sublevel}.0
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%endif
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@ -655,6 +655,9 @@ Patch619: input-rmi4-remove-the-need-for-artifical-IRQ.patch
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# fix gnome 3.26+ not working under VirtualBox, submitted upstream, Cc: Stable
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Patch620: 0001-staging-vboxvideo-Fix-reporting-invalid-suggested-of.patch
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# Headed upstream
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Patch621: drm-i915-Boost-GPU-clocks-if-we-miss-the-pageflip-s-vblank.patch
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# END OF PATCH DEFINITIONS
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%endif
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@ -2209,6 +2212,9 @@ fi
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#
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#
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%changelog
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* Thu Oct 12 2017 Justin M. Forbes <jforbes@fedoraproject.org> - 4.14.0-0.rc4.git3.1
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- Linux v4.14-rc4-84-gff5abbe799e2
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* Thu Oct 12 2017 Hans de Goede <jwrdegoede@fedoraproject.org>
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- Fix vboxvideo causing gnome 3.26+ to not work under VirtualBox
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2
sources
2
sources
@ -1,4 +1,4 @@
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SHA512 (linux-4.13.tar.xz) = a557c2f0303ae618910b7106ff63d9978afddf470f03cb72aa748213e099a0ecd5f3119aea6cbd7b61df30ca6ef3ec57044d524b7babbaabddf8b08b8bafa7d2
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SHA512 (perf-man-4.13.tar.gz) = 9bcc2cd8e56ec583ed2d8e0b0c88e7a94035a1915e40b3177bb02d6c0f10ddd4df9b097b1f5af59efc624226b613e240ddba8ddc2156f3682f992d5455fc5c03
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SHA512 (patch-4.14-rc4.xz) = 11edc0714c9b7ff34986d1534c490987f5977940afc5b176a424a23e437d572d83f8d689b4505128371bf6d4c5956a2042c9c4d222eb72363b977b69c819b3e3
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SHA512 (patch-4.14-rc4-git2.xz) = 96a5bbce69897d0a280dd0c86e95e9874c9062770f51b313b5838e690c8019482b8310a0c8614ad3bebf51d54b9ca5916fdc8f2e3527b434c364a023bbbc2719
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SHA512 (patch-4.14-rc4-git3.xz) = f9bbea88ccbc409243205099da8a5d355c97427c642343a8161969ada916e8fee3db1c81de243dedf84cc133d494167570810b493538a7f46c8e0487f6adbe69
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