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Linux kernel mirror (for testing)
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linux
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#include "drm_fb_helper.h"
43struct 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 int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
58 struct drm_display_mode *adjusted_mode, int x, int y,
59 struct drm_framebuffer *old_fb);
60
61 /* Move the crtc on the current fb to the given position *optional* */
62 int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
63 struct drm_framebuffer *old_fb);
64
65 /* reload the current crtc LUT */
66 void (*load_lut)(struct drm_crtc *crtc);
67};
68
69struct drm_encoder_helper_funcs {
70 void (*dpms)(struct drm_encoder *encoder, int mode);
71 void (*save)(struct drm_encoder *encoder);
72 void (*restore)(struct drm_encoder *encoder);
73
74 bool (*mode_fixup)(struct drm_encoder *encoder,
75 struct drm_display_mode *mode,
76 struct drm_display_mode *adjusted_mode);
77 void (*prepare)(struct drm_encoder *encoder);
78 void (*commit)(struct drm_encoder *encoder);
79 void (*mode_set)(struct drm_encoder *encoder,
80 struct drm_display_mode *mode,
81 struct drm_display_mode *adjusted_mode);
82 struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
83 /* detect for DAC style encoders */
84 enum drm_connector_status (*detect)(struct drm_encoder *encoder,
85 struct drm_connector *connector);
86 /* disable encoder when not in use - more explicit than dpms off */
87 void (*disable)(struct drm_encoder *encoder);
88};
89
90struct drm_connector_helper_funcs {
91 int (*get_modes)(struct drm_connector *connector);
92 int (*mode_valid)(struct drm_connector *connector,
93 struct drm_display_mode *mode);
94 struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
95};
96
97extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
98extern void drm_helper_disable_unused_functions(struct drm_device *dev);
99extern int drm_helper_hotplug_stage_two(struct drm_device *dev);
100extern bool drm_helper_initial_config(struct drm_device *dev);
101extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
102extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
103 struct drm_display_mode *mode,
104 int x, int y,
105 struct drm_framebuffer *old_fb);
106extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
107extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
108
109extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
110
111extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
112 struct drm_mode_fb_cmd *mode_cmd);
113
114static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
115 const struct drm_crtc_helper_funcs *funcs)
116{
117 crtc->helper_private = (void *)funcs;
118}
119
120static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
121 const struct drm_encoder_helper_funcs *funcs)
122{
123 encoder->helper_private = (void *)funcs;
124}
125
126static inline int drm_connector_helper_add(struct drm_connector *connector,
127 const struct drm_connector_helper_funcs *funcs)
128{
129 connector->helper_private = (void *)funcs;
130 return drm_fb_helper_add_connector(connector);
131}
132
133extern int drm_helper_resume_force_mode(struct drm_device *dev);
134#endif