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/spinlock.h>
37 #include <linux/types.h>
38 #include <linux/idr.h>
39
40 #include <linux/fb.h>
41
42 enum mode_set_atomic {
43 LEAVE_ATOMIC_MODE_SET,
44 ENTER_ATOMIC_MODE_SET,
45 };
46
47 struct drm_crtc_helper_funcs {
48 /*
49 * Control power levels on the CRTC. If the mode passed in is
50 * unsupported, the provider must use the next lowest power level.
51 */
52 void (*dpms)(struct drm_crtc *crtc, int mode);
53 void (*prepare)(struct drm_crtc *crtc);
54 void (*commit)(struct drm_crtc *crtc);
55
56 /* Provider can fixup or change mode timings before modeset occurs */
57 bool (*mode_fixup)(struct drm_crtc *crtc,
58 struct drm_display_mode *mode,
59 struct drm_display_mode *adjusted_mode);
60 /* Actually set the mode */
61 int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
62 struct drm_display_mode *adjusted_mode, int x, int y,
63 struct drm_framebuffer *old_fb);
64
65 /* Move the crtc on the current fb to the given position *optional* */
66 int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
67 struct drm_framebuffer *old_fb);
68 int (*mode_set_base_atomic)(struct drm_crtc *crtc,
69 struct drm_framebuffer *fb, int x, int y,
70 enum mode_set_atomic);
71
72 /* reload the current crtc LUT */
73 void (*load_lut)(struct drm_crtc *crtc);
74
75 /* disable crtc when not in use - more explicit than dpms off */
76 void (*disable)(struct drm_crtc *crtc);
77 };
78
79 struct drm_encoder_helper_funcs {
80 void (*dpms)(struct drm_encoder *encoder, int mode);
81 void (*save)(struct drm_encoder *encoder);
82 void (*restore)(struct drm_encoder *encoder);
83
84 bool (*mode_fixup)(struct drm_encoder *encoder,
85 struct drm_display_mode *mode,
86 struct drm_display_mode *adjusted_mode);
87 void (*prepare)(struct drm_encoder *encoder);
88 void (*commit)(struct drm_encoder *encoder);
89 void (*mode_set)(struct drm_encoder *encoder,
90 struct drm_display_mode *mode,
91 struct drm_display_mode *adjusted_mode);
92 struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
93 /* detect for DAC style encoders */
94 enum drm_connector_status (*detect)(struct drm_encoder *encoder,
95 struct drm_connector *connector);
96 /* disable encoder when not in use - more explicit than dpms off */
97 void (*disable)(struct drm_encoder *encoder);
98 };
99
100 struct drm_connector_helper_funcs {
101 int (*get_modes)(struct drm_connector *connector);
102 int (*mode_valid)(struct drm_connector *connector,
103 struct drm_display_mode *mode);
104 struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
105 };
106
107 extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
108 extern void drm_helper_disable_unused_functions(struct drm_device *dev);
109 extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
110 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
111 struct drm_display_mode *mode,
112 int x, int y,
113 struct drm_framebuffer *old_fb);
114 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
115 extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
116
117 extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
118
119 extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
120 struct drm_mode_fb_cmd *mode_cmd);
121
drm_crtc_helper_add(struct drm_crtc * crtc,const struct drm_crtc_helper_funcs * funcs)122 static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
123 const struct drm_crtc_helper_funcs *funcs)
124 {
125 crtc->helper_private = (void *)funcs;
126 }
127
drm_encoder_helper_add(struct drm_encoder * encoder,const struct drm_encoder_helper_funcs * funcs)128 static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
129 const struct drm_encoder_helper_funcs *funcs)
130 {
131 encoder->helper_private = (void *)funcs;
132 }
133
drm_connector_helper_add(struct drm_connector * connector,const struct drm_connector_helper_funcs * funcs)134 static inline void drm_connector_helper_add(struct drm_connector *connector,
135 const struct drm_connector_helper_funcs *funcs)
136 {
137 connector->helper_private = (void *)funcs;
138 }
139
140 extern int drm_helper_resume_force_mode(struct drm_device *dev);
141 extern void drm_kms_helper_poll_init(struct drm_device *dev);
142 extern void drm_kms_helper_poll_fini(struct drm_device *dev);
143 extern void drm_helper_hpd_irq_event(struct drm_device *dev);
144
145 extern void drm_kms_helper_poll_disable(struct drm_device *dev);
146 extern void drm_kms_helper_poll_enable(struct drm_device *dev);
147 #endif
148