1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright © 2020 Intel Corporation
4  */
5 
6 #ifndef _INTEL_CRTC_H_
7 #define _INTEL_CRTC_H_
8 
9 #include <linux/types.h>
10 
11 enum i9xx_plane_id;
12 enum pipe;
13 struct drm_display_mode;
14 struct drm_i915_private;
15 struct intel_atomic_state;
16 struct intel_crtc;
17 struct intel_crtc_state;
18 
19 /*
20  * FIXME: We should instead only take spinlocks once for the entire update
21  * instead of once per mmio.
22  */
23 #if IS_ENABLED(CONFIG_PROVE_LOCKING)
24 #define VBLANK_EVASION_TIME_US 250
25 #else
26 #define VBLANK_EVASION_TIME_US 100
27 #endif
28 
29 int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
30 			     int usecs);
31 u32 intel_crtc_max_vblank_count(const struct intel_crtc_state *crtc_state);
32 int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe);
33 struct intel_crtc_state *intel_crtc_state_alloc(struct intel_crtc *crtc);
34 void intel_crtc_state_reset(struct intel_crtc_state *crtc_state,
35 			    struct intel_crtc *crtc);
36 u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc);
37 void intel_crtc_vblank_on(const struct intel_crtc_state *crtc_state);
38 void intel_crtc_vblank_off(const struct intel_crtc_state *crtc_state);
39 void intel_pipe_update_start(struct intel_crtc_state *new_crtc_state);
40 void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state);
41 void intel_wait_for_vblank_workers(struct intel_atomic_state *state);
42 struct intel_crtc *intel_first_crtc(struct drm_i915_private *i915);
43 struct intel_crtc *intel_crtc_for_pipe(struct drm_i915_private *i915,
44 				       enum pipe pipe);
45 void intel_wait_for_vblank_if_active(struct drm_i915_private *i915,
46 				     enum pipe pipe);
47 void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);
48 
49 #endif
50