1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright © 2019 Intel Corporation
4  */
5 
6 #ifndef __INTEL_CDCLK_H__
7 #define __INTEL_CDCLK_H__
8 
9 #include <linux/types.h>
10 
11 #include "intel_display_limits.h"
12 #include "intel_global_state.h"
13 
14 struct drm_i915_private;
15 struct intel_atomic_state;
16 struct intel_crtc_state;
17 
18 struct intel_cdclk_config {
19 	unsigned int cdclk, vco, ref, bypass;
20 	u8 voltage_level;
21 };
22 
23 struct intel_cdclk_state {
24 	struct intel_global_state base;
25 
26 	/*
27 	 * Logical configuration of cdclk (used for all scaling,
28 	 * watermark, etc. calculations and checks). This is
29 	 * computed as if all enabled crtcs were active.
30 	 */
31 	struct intel_cdclk_config logical;
32 
33 	/*
34 	 * Actual configuration of cdclk, can be different from the
35 	 * logical configuration only when all crtc's are DPMS off.
36 	 */
37 	struct intel_cdclk_config actual;
38 
39 	/* minimum acceptable cdclk to satisfy bandwidth requirements */
40 	int bw_min_cdclk;
41 	/* minimum acceptable cdclk for each pipe */
42 	int min_cdclk[I915_MAX_PIPES];
43 	/* minimum acceptable voltage level for each pipe */
44 	u8 min_voltage_level[I915_MAX_PIPES];
45 
46 	/* pipe to which cd2x update is synchronized */
47 	enum pipe pipe;
48 
49 	/* forced minimum cdclk for glk+ audio w/a */
50 	int force_min_cdclk;
51 
52 	/* bitmask of active pipes */
53 	u8 active_pipes;
54 };
55 
56 int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state);
57 void intel_cdclk_init_hw(struct drm_i915_private *i915);
58 void intel_cdclk_uninit_hw(struct drm_i915_private *i915);
59 void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv);
60 void intel_update_max_cdclk(struct drm_i915_private *dev_priv);
61 void intel_update_cdclk(struct drm_i915_private *dev_priv);
62 u32 intel_read_rawclk(struct drm_i915_private *dev_priv);
63 bool intel_cdclk_needs_modeset(const struct intel_cdclk_config *a,
64 			       const struct intel_cdclk_config *b);
65 void intel_set_cdclk_pre_plane_update(struct intel_atomic_state *state);
66 void intel_set_cdclk_post_plane_update(struct intel_atomic_state *state);
67 void intel_cdclk_dump_config(struct drm_i915_private *i915,
68 			     const struct intel_cdclk_config *cdclk_config,
69 			     const char *context);
70 int intel_modeset_calc_cdclk(struct intel_atomic_state *state);
71 void intel_cdclk_get_cdclk(struct drm_i915_private *dev_priv,
72 			   struct intel_cdclk_config *cdclk_config);
73 int intel_cdclk_atomic_check(struct intel_atomic_state *state,
74 			     bool *need_cdclk_calc);
75 struct intel_cdclk_state *
76 intel_atomic_get_cdclk_state(struct intel_atomic_state *state);
77 
78 #define to_intel_cdclk_state(x) container_of((x), struct intel_cdclk_state, base)
79 #define intel_atomic_get_old_cdclk_state(state) \
80 	to_intel_cdclk_state(intel_atomic_get_old_global_obj_state(state, &to_i915(state->base.dev)->display.cdclk.obj))
81 #define intel_atomic_get_new_cdclk_state(state) \
82 	to_intel_cdclk_state(intel_atomic_get_new_global_obj_state(state, &to_i915(state->base.dev)->display.cdclk.obj))
83 
84 int intel_cdclk_init(struct drm_i915_private *dev_priv);
85 void intel_cdclk_debugfs_register(struct drm_i915_private *i915);
86 
87 #endif /* __INTEL_CDCLK_H__ */
88