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 enum mode_set_atomic {
43 LEAVE_ATOMIC_MODE_SET,
44 ENTER_ATOMIC_MODE_SET,
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
52 * The helper operations are called by the mid-layer CRTC helper.
54 struct drm_crtc_helper_funcs {
56 * Control power levels on the CRTC. If the mode passed in is
57 * unsupported, the provider must use the next lowest power level.
59 void (*dpms)(struct drm_crtc *crtc, int mode);
60 void (*prepare)(struct drm_crtc *crtc);
61 void (*commit)(struct drm_crtc *crtc);
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);
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);
79 /* reload the current crtc LUT */
80 void (*load_lut)(struct drm_crtc *crtc);
82 /* disable crtc when not in use - more explicit than dpms off */
83 void (*disable)(struct drm_crtc *crtc);
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
91 * The helper operations are called by the mid-layer CRTC helper.
93 struct 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);
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);
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?
119 * The helper operations are called by the mid-layer CRTC helper.
121 struct drm_connector_helper_funcs {
122 int (*get_modes)(struct drm_connector *connector);
123 int (*mode_valid)(struct drm_connector *connector,
124 struct drm_display_mode *mode);
125 struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
128 extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
129 extern void drm_helper_disable_unused_functions(struct drm_device *dev);
130 extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
131 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
132 struct drm_display_mode *mode,
134 struct drm_framebuffer *old_fb);
135 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
136 extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
138 extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
140 extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
142 extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
143 struct drm_mode_fb_cmd2 *mode_cmd);
145 static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
146 const struct drm_crtc_helper_funcs *funcs)
148 crtc->helper_private = (void *)funcs;
151 static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
152 const struct drm_encoder_helper_funcs *funcs)
154 encoder->helper_private = (void *)funcs;
157 static inline void drm_connector_helper_add(struct drm_connector *connector,
158 const struct drm_connector_helper_funcs *funcs)
160 connector->helper_private = (void *)funcs;
163 extern int drm_helper_resume_force_mode(struct drm_device *dev);
164 extern void drm_kms_helper_poll_init(struct drm_device *dev);
165 extern void drm_kms_helper_poll_fini(struct drm_device *dev);
166 extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
167 extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
169 extern void drm_kms_helper_poll_disable(struct drm_device *dev);
170 extern void drm_kms_helper_poll_enable(struct drm_device *dev);