Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Daniel Vetter | 342 | 73.87% | 6 | 27.27% |
Chris Wilson | 63 | 13.61% | 5 | 22.73% |
Rodrigo Vivi | 22 | 4.75% | 5 | 22.73% |
Paulo Zanoni | 18 | 3.89% | 4 | 18.18% |
Vandana Kannan | 12 | 2.59% | 1 | 4.55% |
Dhinakaran Pandiyan | 6 | 1.30% | 1 | 4.55% |
Total | 463 | 22 |
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/* * Copyright © 2014 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Authors: * Daniel Vetter <daniel.vetter@ffwll.ch> */ /** * DOC: frontbuffer tracking * * Many features require us to track changes to the currently active * frontbuffer, especially rendering targeted at the frontbuffer. * * To be able to do so GEM tracks frontbuffers using a bitmask for all possible * frontbuffer slots through i915_gem_track_fb(). The function in this file are * then called when the contents of the frontbuffer are invalidated, when * frontbuffer rendering has stopped again to flush out all the changes and when * the frontbuffer is exchanged with a flip. Subsystems interested in * frontbuffer changes (e.g. PSR, FBC, DRRS) should directly put their callbacks * into the relevant places and filter for the frontbuffer slots that they are * interested int. * * On a high level there are two types of powersaving features. The first one * work like a special cache (FBC and PSR) and are interested when they should * stop caching and when to restart caching. This is done by placing callbacks * into the invalidate and the flush functions: At invalidate the caching must * be stopped and at flush time it can be restarted. And maybe they need to know * when the frontbuffer changes (e.g. when the hw doesn't initiate an invalidate * and flush on its own) which can be achieved with placing callbacks into the * flip functions. * * The other type of display power saving feature only cares about busyness * (e.g. DRRS). In that case all three (invalidate, flush and flip) indicate * busyness. There is no direct way to detect idleness. Instead an idle timer * work delayed work should be started from the flush and flip functions and * cancelled as soon as busyness is detected. * * Note that there's also an older frontbuffer activity tracking scheme which * just tracks general activity. This is done by the various mark_busy and * mark_idle functions. For display power management features using these * functions is deprecated and should be avoided. */ #include <drm/drmP.h> #include "intel_drv.h" #include "intel_frontbuffer.h" #include "i915_drv.h" void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj, enum fb_op_origin origin, unsigned int frontbuffer_bits) { struct drm_i915_private *dev_priv = to_i915(obj->base.dev); if (origin == ORIGIN_CS) { spin_lock(&dev_priv->fb_tracking.lock); dev_priv->fb_tracking.busy_bits |= frontbuffer_bits; dev_priv->fb_tracking.flip_bits &= ~frontbuffer_bits; spin_unlock(&dev_priv->fb_tracking.lock); } might_sleep(); intel_psr_invalidate(dev_priv, frontbuffer_bits, origin); intel_edp_drrs_invalidate(dev_priv, frontbuffer_bits); intel_fbc_invalidate(dev_priv, frontbuffer_bits, origin); } /** * intel_frontbuffer_flush - flush frontbuffer * @dev_priv: i915 device * @frontbuffer_bits: frontbuffer plane tracking bits * @origin: which operation caused the flush * * This function gets called every time rendering on the given planes has * completed and frontbuffer caching can be started again. Flushes will get * delayed if they're blocked by some outstanding asynchronous rendering. * * Can be called without any locks held. */ static void intel_frontbuffer_flush(struct drm_i915_private *dev_priv, unsigned frontbuffer_bits, enum fb_op_origin origin) { /* Delay flushing when rings are still busy.*/ spin_lock(&dev_priv->fb_tracking.lock); frontbuffer_bits &= ~dev_priv->fb_tracking.busy_bits; spin_unlock(&dev_priv->fb_tracking.lock); if (!frontbuffer_bits) return; might_sleep(); intel_edp_drrs_flush(dev_priv, frontbuffer_bits); intel_psr_flush(dev_priv, frontbuffer_bits, origin); intel_fbc_flush(dev_priv, frontbuffer_bits, origin); } void __intel_fb_obj_flush(struct drm_i915_gem_object *obj, enum fb_op_origin origin, unsigned int frontbuffer_bits) { struct drm_i915_private *dev_priv = to_i915(obj->base.dev); if (origin == ORIGIN_CS) { spin_lock(&dev_priv->fb_tracking.lock); /* Filter out new bits since rendering started. */ frontbuffer_bits &= dev_priv->fb_tracking.busy_bits; dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits; spin_unlock(&dev_priv->fb_tracking.lock); } if (frontbuffer_bits) intel_frontbuffer_flush(dev_priv, frontbuffer_bits, origin); } /** * intel_frontbuffer_flip_prepare - prepare asynchronous frontbuffer flip * @dev_priv: i915 device * @frontbuffer_bits: frontbuffer plane tracking bits * * This function gets called after scheduling a flip on @obj. The actual * frontbuffer flushing will be delayed until completion is signalled with * intel_frontbuffer_flip_complete. If an invalidate happens in between this * flush will be cancelled. * * Can be called without any locks held. */ void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv, unsigned frontbuffer_bits) { spin_lock(&dev_priv->fb_tracking.lock); dev_priv->fb_tracking.flip_bits |= frontbuffer_bits; /* Remove stale busy bits due to the old buffer. */ dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits; spin_unlock(&dev_priv->fb_tracking.lock); } /** * intel_frontbuffer_flip_complete - complete asynchronous frontbuffer flip * @dev_priv: i915 device * @frontbuffer_bits: frontbuffer plane tracking bits * * This function gets called after the flip has been latched and will complete * on the next vblank. It will execute the flush if it hasn't been cancelled yet. * * Can be called without any locks held. */ void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv, unsigned frontbuffer_bits) { spin_lock(&dev_priv->fb_tracking.lock); /* Mask any cancelled flips. */ frontbuffer_bits &= dev_priv->fb_tracking.flip_bits; dev_priv->fb_tracking.flip_bits &= ~frontbuffer_bits; spin_unlock(&dev_priv->fb_tracking.lock); if (frontbuffer_bits) intel_frontbuffer_flush(dev_priv, frontbuffer_bits, ORIGIN_FLIP); } /** * intel_frontbuffer_flip - synchronous frontbuffer flip * @dev_priv: i915 device * @frontbuffer_bits: frontbuffer plane tracking bits * * This function gets called after scheduling a flip on @obj. This is for * synchronous plane updates which will happen on the next vblank and which will * not get delayed by pending gpu rendering. * * Can be called without any locks held. */ void intel_frontbuffer_flip(struct drm_i915_private *dev_priv, unsigned frontbuffer_bits) { spin_lock(&dev_priv->fb_tracking.lock); /* Remove stale busy bits due to the old buffer. */ dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits; spin_unlock(&dev_priv->fb_tracking.lock); intel_frontbuffer_flush(dev_priv, frontbuffer_bits, ORIGIN_FLIP); }
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