2 * Copyright © 2006 Keith Packard
3 * Copyright © 2007-2008 Dave Airlie
4 * Copyright © 2007-2008 Intel Corporation
5 * Jesse Barnes <jesse.barnes@intel.com>
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:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
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.
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
33 #ifndef __DRM_CRTC_HELPER_H__
34 #define __DRM_CRTC_HELPER_H__
36 #include <linux/spinlock.h>
37 #include <linux/types.h>
38 #include <linux/idr.h>
42 #include <drm/drm_crtc.h>
44 enum mode_set_atomic {
45 LEAVE_ATOMIC_MODE_SET,
46 ENTER_ATOMIC_MODE_SET,
50 * struct drm_crtc_helper_funcs - helper operations for CRTCs
51 * @dpms: set power state
52 * @prepare: prepare the CRTC, called before @mode_set
53 * @commit: commit changes to CRTC, called after @mode_set
54 * @mode_fixup: try to fixup proposed mode for this CRTC
55 * @mode_set: set this mode
56 * @mode_set_nofb: set mode only (no scanout buffer attached)
57 * @mode_set_base: update the scanout buffer
58 * @mode_set_base_atomic: non-blocking mode set (used for kgdb support)
59 * @load_lut: load color palette
60 * @disable: disable CRTC when no longer in use
61 * @atomic_check: check for validity of an atomic state
62 * @atomic_begin: begin atomic update
63 * @atomic_flush: flush atomic update
65 * The helper operations are called by the mid-layer CRTC helper.
67 struct drm_crtc_helper_funcs {
69 * Control power levels on the CRTC. If the mode passed in is
70 * unsupported, the provider must use the next lowest power level.
72 void (*dpms)(struct drm_crtc *crtc, int mode);
73 void (*prepare)(struct drm_crtc *crtc);
74 void (*commit)(struct drm_crtc *crtc);
76 /* Provider can fixup or change mode timings before modeset occurs */
77 bool (*mode_fixup)(struct drm_crtc *crtc,
78 const struct drm_display_mode *mode,
79 struct drm_display_mode *adjusted_mode);
80 /* Actually set the mode */
81 int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
82 struct drm_display_mode *adjusted_mode, int x, int y,
83 struct drm_framebuffer *old_fb);
84 void (*mode_set_nofb)(struct drm_crtc *crtc);
86 /* Move the crtc on the current fb to the given position *optional* */
87 int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
88 struct drm_framebuffer *old_fb);
89 int (*mode_set_base_atomic)(struct drm_crtc *crtc,
90 struct drm_framebuffer *fb, int x, int y,
91 enum mode_set_atomic);
93 /* reload the current crtc LUT */
94 void (*load_lut)(struct drm_crtc *crtc);
96 /* disable crtc when not in use - more explicit than dpms off */
97 void (*disable)(struct drm_crtc *crtc);
100 int (*atomic_check)(struct drm_crtc *crtc,
101 struct drm_crtc_state *state);
102 void (*atomic_begin)(struct drm_crtc *crtc);
103 void (*atomic_flush)(struct drm_crtc *crtc);
107 * struct drm_encoder_helper_funcs - helper operations for encoders
108 * @dpms: set power state
109 * @save: save connector state
110 * @restore: restore connector state
111 * @mode_fixup: try to fixup proposed mode for this connector
112 * @prepare: part of the disable sequence, called before the CRTC modeset
113 * @commit: called after the CRTC modeset
114 * @mode_set: set this mode
115 * @get_crtc: return CRTC that the encoder is currently attached to
116 * @detect: connection status detection
117 * @disable: disable encoder when not in use (overrides DPMS off)
119 * The helper operations are called by the mid-layer CRTC helper.
121 struct drm_encoder_helper_funcs {
122 void (*dpms)(struct drm_encoder *encoder, int mode);
123 void (*save)(struct drm_encoder *encoder);
124 void (*restore)(struct drm_encoder *encoder);
126 bool (*mode_fixup)(struct drm_encoder *encoder,
127 const struct drm_display_mode *mode,
128 struct drm_display_mode *adjusted_mode);
129 void (*prepare)(struct drm_encoder *encoder);
130 void (*commit)(struct drm_encoder *encoder);
131 void (*mode_set)(struct drm_encoder *encoder,
132 struct drm_display_mode *mode,
133 struct drm_display_mode *adjusted_mode);
134 struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
135 /* detect for DAC style encoders */
136 enum drm_connector_status (*detect)(struct drm_encoder *encoder,
137 struct drm_connector *connector);
138 /* disable encoder when not in use - more explicit than dpms off */
139 void (*disable)(struct drm_encoder *encoder);
143 * struct drm_connector_helper_funcs - helper operations for connectors
144 * @get_modes: get mode list for this connector
145 * @mode_valid: is this mode valid on the given connector? (optional)
146 * @best_encoder: return the preferred encoder for this connector
148 * The helper operations are called by the mid-layer CRTC helper.
150 struct drm_connector_helper_funcs {
151 int (*get_modes)(struct drm_connector *connector);
152 enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
153 struct drm_display_mode *mode);
154 struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
157 extern void drm_helper_disable_unused_functions(struct drm_device *dev);
158 extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
159 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
160 struct drm_display_mode *mode,
162 struct drm_framebuffer *old_fb);
163 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
164 extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
166 extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
168 extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
170 extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
171 struct drm_mode_fb_cmd2 *mode_cmd);
173 static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
174 const struct drm_crtc_helper_funcs *funcs)
176 crtc->helper_private = (void *)funcs;
179 static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
180 const struct drm_encoder_helper_funcs *funcs)
182 encoder->helper_private = (void *)funcs;
185 static inline void drm_connector_helper_add(struct drm_connector *connector,
186 const struct drm_connector_helper_funcs *funcs)
188 connector->helper_private = (void *)funcs;
191 extern void drm_helper_resume_force_mode(struct drm_device *dev);
193 int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
194 struct drm_display_mode *adjusted_mode, int x, int y,
195 struct drm_framebuffer *old_fb);
196 int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
197 struct drm_framebuffer *old_fb);
199 /* drm_probe_helper.c */
200 extern int drm_helper_probe_single_connector_modes(struct drm_connector
201 *connector, uint32_t maxX,
203 extern int drm_helper_probe_single_connector_modes_nomerge(struct drm_connector
207 extern void drm_kms_helper_poll_init(struct drm_device *dev);
208 extern void drm_kms_helper_poll_fini(struct drm_device *dev);
209 extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
210 extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
212 extern void drm_kms_helper_poll_disable(struct drm_device *dev);
213 extern void drm_kms_helper_poll_enable(struct drm_device *dev);