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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/spinlock.h>
37#include <linux/types.h>
38#include <linux/idr.h>
39
40#include <linux/fb.h>
41
42#include <drm/drm_crtc.h>
43#include <drm/drm_modeset_helper_vtables.h>
44#include <drm/drm_modeset_helper.h>
45
46void drm_helper_disable_unused_functions(struct drm_device *dev);
47int drm_crtc_helper_set_config(struct drm_mode_set *set,
48 struct drm_modeset_acquire_ctx *ctx);
49bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
50 struct drm_display_mode *mode,
51 int x, int y,
52 struct drm_framebuffer *old_fb);
53int drm_crtc_helper_atomic_check(struct drm_crtc *crtc,
54 struct drm_atomic_state *state);
55bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
56bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
57
58int drm_helper_connector_dpms(struct drm_connector *connector, int mode);
59
60void drm_helper_resume_force_mode(struct drm_device *dev);
61int drm_helper_force_disable_all(struct drm_device *dev);
62
63#endif
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
42enum mode_set_atomic {
43 LEAVE_ATOMIC_MODE_SET,
44 ENTER_ATOMIC_MODE_SET,
45};
46
47/**
48 * drm_crtc_helper_funcs - helper operations for CRTCs
49 * @mode_fixup: try to fixup proposed mode for this connector
50 * @mode_set: set this mode
51 *
52 * The helper operations are called by the mid-layer CRTC helper.
53 */
54struct drm_crtc_helper_funcs {
55 /*
56 * Control power levels on the CRTC. If the mode passed in is
57 * unsupported, the provider must use the next lowest power level.
58 */
59 void (*dpms)(struct drm_crtc *crtc, int mode);
60 void (*prepare)(struct drm_crtc *crtc);
61 void (*commit)(struct drm_crtc *crtc);
62
63 /* Provider can fixup or change mode timings before modeset occurs */
64 bool (*mode_fixup)(struct drm_crtc *crtc,
65 const struct drm_display_mode *mode,
66 struct drm_display_mode *adjusted_mode);
67 /* Actually set the mode */
68 int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
69 struct drm_display_mode *adjusted_mode, int x, int y,
70 struct drm_framebuffer *old_fb);
71
72 /* Move the crtc on the current fb to the given position *optional* */
73 int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
74 struct drm_framebuffer *old_fb);
75 int (*mode_set_base_atomic)(struct drm_crtc *crtc,
76 struct drm_framebuffer *fb, int x, int y,
77 enum mode_set_atomic);
78
79 /* reload the current crtc LUT */
80 void (*load_lut)(struct drm_crtc *crtc);
81
82 /* disable crtc when not in use - more explicit than dpms off */
83 void (*disable)(struct drm_crtc *crtc);
84};
85
86/**
87 * drm_encoder_helper_funcs - helper operations for encoders
88 * @mode_fixup: try to fixup proposed mode for this connector
89 * @mode_set: set this mode
90 *
91 * The helper operations are called by the mid-layer CRTC helper.
92 */
93struct drm_encoder_helper_funcs {
94 void (*dpms)(struct drm_encoder *encoder, int mode);
95 void (*save)(struct drm_encoder *encoder);
96 void (*restore)(struct drm_encoder *encoder);
97
98 bool (*mode_fixup)(struct drm_encoder *encoder,
99 const struct drm_display_mode *mode,
100 struct drm_display_mode *adjusted_mode);
101 void (*prepare)(struct drm_encoder *encoder);
102 void (*commit)(struct drm_encoder *encoder);
103 void (*mode_set)(struct drm_encoder *encoder,
104 struct drm_display_mode *mode,
105 struct drm_display_mode *adjusted_mode);
106 struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
107 /* detect for DAC style encoders */
108 enum drm_connector_status (*detect)(struct drm_encoder *encoder,
109 struct drm_connector *connector);
110 /* disable encoder when not in use - more explicit than dpms off */
111 void (*disable)(struct drm_encoder *encoder);
112};
113
114/**
115 * drm_connector_helper_funcs - helper operations for connectors
116 * @get_modes: get mode list for this connector
117 * @mode_valid: is this mode valid on the given connector?
118 *
119 * The helper operations are called by the mid-layer CRTC helper.
120 */
121struct drm_connector_helper_funcs {
122 int (*get_modes)(struct drm_connector *connector);
123 enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
124 struct drm_display_mode *mode);
125 struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
126};
127
128extern void drm_helper_disable_unused_functions(struct drm_device *dev);
129extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
130extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
131 struct drm_display_mode *mode,
132 int x, int y,
133 struct drm_framebuffer *old_fb);
134extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
135extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
136
137extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
138
139extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
140
141extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
142 struct drm_mode_fb_cmd2 *mode_cmd);
143
144static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
145 const struct drm_crtc_helper_funcs *funcs)
146{
147 crtc->helper_private = (void *)funcs;
148}
149
150static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
151 const struct drm_encoder_helper_funcs *funcs)
152{
153 encoder->helper_private = (void *)funcs;
154}
155
156static inline void drm_connector_helper_add(struct drm_connector *connector,
157 const struct drm_connector_helper_funcs *funcs)
158{
159 connector->helper_private = (void *)funcs;
160}
161
162extern void drm_helper_resume_force_mode(struct drm_device *dev);
163
164/* drm_probe_helper.c */
165extern int drm_helper_probe_single_connector_modes(struct drm_connector
166 *connector, uint32_t maxX,
167 uint32_t maxY);
168extern void drm_kms_helper_poll_init(struct drm_device *dev);
169extern void drm_kms_helper_poll_fini(struct drm_device *dev);
170extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
171extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
172
173extern void drm_kms_helper_poll_disable(struct drm_device *dev);
174extern void drm_kms_helper_poll_enable(struct drm_device *dev);
175
176#endif