1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2023 Intel Corporation
4 */
5
6#include <drm/drm_crtc.h>
7#include <drm/drm_vblank.h>
8
9#include "gt/intel_rps.h"
10#include "i915_drv.h"
11#include "i915_reg.h"
12#include "intel_display_core.h"
13#include "intel_display_irq.h"
14#include "intel_display_rps.h"
15#include "intel_display_types.h"
16
17struct wait_rps_boost {
18 struct wait_queue_entry wait;
19
20 struct drm_crtc *crtc;
21 struct i915_request *request;
22};
23
24static int do_rps_boost(struct wait_queue_entry *_wait,
25 unsigned mode, int sync, void *key)
26{
27 struct wait_rps_boost *wait = container_of(_wait, typeof(*wait), wait);
28 struct i915_request *rq = wait->request;
29
30 /*
31 * If we missed the vblank, but the request is already running it
32 * is reasonable to assume that it will complete before the next
33 * vblank without our intervention, so leave RPS alone.
34 */
35 if (!i915_request_started(rq))
36 intel_rps_boost(rq);
37 i915_request_put(rq);
38
39 drm_crtc_vblank_put(crtc: wait->crtc);
40
41 list_del(entry: &wait->wait.entry);
42 kfree(objp: wait);
43 return 1;
44}
45
46void intel_display_rps_boost_after_vblank(struct drm_crtc *crtc,
47 struct dma_fence *fence)
48{
49 struct intel_display *display = to_intel_display(crtc->dev);
50 struct wait_rps_boost *wait;
51
52 if (!dma_fence_is_i915(fence))
53 return;
54
55 if (DISPLAY_VER(display) < 6)
56 return;
57
58 if (drm_crtc_vblank_get(crtc))
59 return;
60
61 wait = kmalloc(sizeof(*wait), GFP_KERNEL);
62 if (!wait) {
63 drm_crtc_vblank_put(crtc);
64 return;
65 }
66
67 wait->request = to_request(fence: dma_fence_get(fence));
68 wait->crtc = crtc;
69
70 wait->wait.func = do_rps_boost;
71 wait->wait.flags = 0;
72
73 add_wait_queue(wq_head: drm_crtc_vblank_waitqueue(crtc), wq_entry: &wait->wait);
74}
75
76void intel_display_rps_mark_interactive(struct intel_display *display,
77 struct intel_atomic_state *state,
78 bool interactive)
79{
80 struct drm_i915_private *i915 = to_i915(dev: display->drm);
81
82 if (state->rps_interactive == interactive)
83 return;
84
85 intel_rps_mark_interactive(rps: &to_gt(i915)->rps, interactive);
86 state->rps_interactive = interactive;
87}
88
89void ilk_display_rps_enable(struct intel_display *display)
90{
91 spin_lock(lock: &display->irq.lock);
92 ilk_enable_display_irq(display, DE_PCU_EVENT);
93 spin_unlock(lock: &display->irq.lock);
94}
95
96void ilk_display_rps_disable(struct intel_display *display)
97{
98 spin_lock(lock: &display->irq.lock);
99 ilk_disable_display_irq(display, DE_PCU_EVENT);
100 spin_unlock(lock: &display->irq.lock);
101}
102
103void ilk_display_rps_irq_handler(struct intel_display *display)
104{
105 struct drm_i915_private *i915 = to_i915(dev: display->drm);
106
107 gen5_rps_irq_handler(rps: &to_gt(i915)->rps);
108}
109