diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_frontbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_frontbuffer.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/drivers/gpu/drm/i915/intel_frontbuffer.c b/drivers/gpu/drm/i915/intel_frontbuffer.c deleted file mode 100644 index 16f253deaf8d..000000000000 --- a/drivers/gpu/drm/i915/intel_frontbuffer.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * 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 "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); -} |