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1 | /* |
2 | * Copyright © 2006 Keith Packard | |
3 | * Copyright © 2007-2008 Dave Airlie | |
4 | * Copyright © 2007-2008 Intel Corporation | |
5 | * Jesse Barnes <jesse.barnes@intel.com> | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a | |
8 | * copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation | |
10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
11 | * and/or sell copies of the Software, and to permit persons to whom the | |
12 | * Software is furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
21 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
22 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
23 | * OTHER DEALINGS IN THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | /* | |
27 | * The DRM mode setting helper functions are common code for drivers to use if | |
28 | * they wish. Drivers are not forced to use this code in their | |
29 | * implementations but it would be useful if they code they do use at least | |
30 | * provides a consistent interface and operation to userspace | |
31 | */ | |
32 | ||
33 | #ifndef __DRM_CRTC_HELPER_H__ | |
34 | #define __DRM_CRTC_HELPER_H__ | |
35 | ||
36 | #include <linux/i2c.h> | |
37 | #include <linux/spinlock.h> | |
38 | #include <linux/types.h> | |
39 | #include <linux/idr.h> | |
40 | ||
41 | #include <linux/fb.h> | |
42 | ||
43 | struct drm_crtc_helper_funcs { | |
44 | /* | |
45 | * Control power levels on the CRTC. If the mode passed in is | |
46 | * unsupported, the provider must use the next lowest power level. | |
47 | */ | |
48 | void (*dpms)(struct drm_crtc *crtc, int mode); | |
49 | void (*prepare)(struct drm_crtc *crtc); | |
50 | void (*commit)(struct drm_crtc *crtc); | |
51 | ||
52 | /* Provider can fixup or change mode timings before modeset occurs */ | |
53 | bool (*mode_fixup)(struct drm_crtc *crtc, | |
54 | struct drm_display_mode *mode, | |
55 | struct drm_display_mode *adjusted_mode); | |
56 | /* Actually set the mode */ | |
57 | void (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
58 | struct drm_display_mode *adjusted_mode, int x, int y); | |
59 | ||
60 | /* Move the crtc on the current fb to the given position *optional* */ | |
61 | void (*mode_set_base)(struct drm_crtc *crtc, int x, int y); | |
62 | }; | |
63 | ||
64 | struct drm_encoder_helper_funcs { | |
65 | void (*dpms)(struct drm_encoder *encoder, int mode); | |
66 | void (*save)(struct drm_encoder *encoder); | |
67 | void (*restore)(struct drm_encoder *encoder); | |
68 | ||
69 | bool (*mode_fixup)(struct drm_encoder *encoder, | |
70 | struct drm_display_mode *mode, | |
71 | struct drm_display_mode *adjusted_mode); | |
72 | void (*prepare)(struct drm_encoder *encoder); | |
73 | void (*commit)(struct drm_encoder *encoder); | |
74 | void (*mode_set)(struct drm_encoder *encoder, | |
75 | struct drm_display_mode *mode, | |
76 | struct drm_display_mode *adjusted_mode); | |
77 | /* detect for DAC style encoders */ | |
78 | enum drm_connector_status (*detect)(struct drm_encoder *encoder, | |
79 | struct drm_connector *connector); | |
80 | }; | |
81 | ||
82 | struct drm_connector_helper_funcs { | |
83 | int (*get_modes)(struct drm_connector *connector); | |
84 | int (*mode_valid)(struct drm_connector *connector, | |
85 | struct drm_display_mode *mode); | |
86 | struct drm_encoder *(*best_encoder)(struct drm_connector *connector); | |
87 | }; | |
88 | ||
89 | extern void drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY); | |
90 | extern void drm_helper_disable_unused_functions(struct drm_device *dev); | |
91 | extern int drm_helper_hotplug_stage_two(struct drm_device *dev); | |
92 | extern bool drm_helper_initial_config(struct drm_device *dev, bool can_grow); | |
93 | extern int drm_crtc_helper_set_config(struct drm_mode_set *set); | |
94 | extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
95 | struct drm_display_mode *mode, | |
96 | int x, int y); | |
97 | extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc); | |
98 | ||
99 | extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, | |
100 | struct drm_mode_fb_cmd *mode_cmd); | |
101 | ||
102 | static inline void drm_crtc_helper_add(struct drm_crtc *crtc, | |
103 | const struct drm_crtc_helper_funcs *funcs) | |
104 | { | |
105 | crtc->helper_private = (void *)funcs; | |
106 | } | |
107 | ||
108 | static inline void drm_encoder_helper_add(struct drm_encoder *encoder, | |
109 | const struct drm_encoder_helper_funcs *funcs) | |
110 | { | |
111 | encoder->helper_private = (void *)funcs; | |
112 | } | |
113 | ||
114 | static inline void drm_connector_helper_add(struct drm_connector *connector, | |
115 | const struct drm_connector_helper_funcs *funcs) | |
116 | { | |
117 | connector->helper_private = (void *)funcs; | |
118 | } | |
119 | ||
120 | extern int drm_helper_resume_force_mode(struct drm_device *dev); | |
121 | #endif |