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 "intel_display_rps.h"
12 #include "intel_display_types.h"
13 
14 struct wait_rps_boost {
15 	struct wait_queue_entry wait;
16 
17 	struct drm_crtc *crtc;
18 	struct i915_request *request;
19 };
20 
21 static int do_rps_boost(struct wait_queue_entry *_wait,
22 			unsigned mode, int sync, void *key)
23 {
24 	struct wait_rps_boost *wait = container_of(_wait, typeof(*wait), wait);
25 	struct i915_request *rq = wait->request;
26 
27 	/*
28 	 * If we missed the vblank, but the request is already running it
29 	 * is reasonable to assume that it will complete before the next
30 	 * vblank without our intervention, so leave RPS alone.
31 	 */
32 	if (!i915_request_started(rq))
33 		intel_rps_boost(rq);
34 	i915_request_put(rq);
35 
36 	drm_crtc_vblank_put(wait->crtc);
37 
38 	list_del(&wait->wait.entry);
39 	kfree(wait);
40 	return 1;
41 }
42 
43 void intel_display_rps_boost_after_vblank(struct drm_crtc *crtc,
44 					  struct dma_fence *fence)
45 {
46 	struct wait_rps_boost *wait;
47 
48 	if (!dma_fence_is_i915(fence))
49 		return;
50 
51 	if (DISPLAY_VER(to_i915(crtc->dev)) < 6)
52 		return;
53 
54 	if (drm_crtc_vblank_get(crtc))
55 		return;
56 
57 	wait = kmalloc(sizeof(*wait), GFP_KERNEL);
58 	if (!wait) {
59 		drm_crtc_vblank_put(crtc);
60 		return;
61 	}
62 
63 	wait->request = to_request(dma_fence_get(fence));
64 	wait->crtc = crtc;
65 
66 	wait->wait.func = do_rps_boost;
67 	wait->wait.flags = 0;
68 
69 	add_wait_queue(drm_crtc_vblank_waitqueue(crtc), &wait->wait);
70 }
71 
72 void intel_display_rps_mark_interactive(struct drm_i915_private *i915,
73 					struct intel_atomic_state *state,
74 					bool interactive)
75 {
76 	if (state->rps_interactive == interactive)
77 		return;
78 
79 	intel_rps_mark_interactive(&to_gt(i915)->rps, interactive);
80 	state->rps_interactive = interactive;
81 }
82