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 44 enum mode_set_atomic { 45 LEAVE_ATOMIC_MODE_SET, 46 ENTER_ATOMIC_MODE_SET, 47 }; 48 49 /** 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 * @enable: enable CRTC 62 * @atomic_check: check for validity of an atomic state 63 * @atomic_begin: begin atomic update 64 * @atomic_flush: flush atomic update 65 * 66 * The helper operations are called by the mid-layer CRTC helper. 67 * 68 * Note that with atomic helpers @dpms, @prepare and @commit hooks are 69 * deprecated. Used @enable and @disable instead exclusively. 70 * 71 * With legacy crtc helpers there's a big semantic difference between @disable 72 * and the other hooks: @disable also needs to release any resources acquired in 73 * @mode_set (like shared PLLs). 74 */ 75 struct drm_crtc_helper_funcs { 76 /* 77 * Control power levels on the CRTC. If the mode passed in is 78 * unsupported, the provider must use the next lowest power level. 79 */ 80 void (*dpms)(struct drm_crtc *crtc, int mode); 81 void (*prepare)(struct drm_crtc *crtc); 82 void (*commit)(struct drm_crtc *crtc); 83 84 /* Provider can fixup or change mode timings before modeset occurs */ 85 bool (*mode_fixup)(struct drm_crtc *crtc, 86 const struct drm_display_mode *mode, 87 struct drm_display_mode *adjusted_mode); 88 /* Actually set the mode */ 89 int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode, 90 struct drm_display_mode *adjusted_mode, int x, int y, 91 struct drm_framebuffer *old_fb); 92 /* Actually set the mode for atomic helpers, optional */ 93 void (*mode_set_nofb)(struct drm_crtc *crtc); 94 95 /* Move the crtc on the current fb to the given position *optional* */ 96 int (*mode_set_base)(struct drm_crtc *crtc, int x, int y, 97 struct drm_framebuffer *old_fb); 98 int (*mode_set_base_atomic)(struct drm_crtc *crtc, 99 struct drm_framebuffer *fb, int x, int y, 100 enum mode_set_atomic); 101 102 /* reload the current crtc LUT */ 103 void (*load_lut)(struct drm_crtc *crtc); 104 105 void (*disable)(struct drm_crtc *crtc); 106 void (*enable)(struct drm_crtc *crtc); 107 108 /* atomic helpers */ 109 int (*atomic_check)(struct drm_crtc *crtc, 110 struct drm_crtc_state *state); 111 void (*atomic_begin)(struct drm_crtc *crtc, 112 struct drm_crtc_state *old_crtc_state); 113 void (*atomic_flush)(struct drm_crtc *crtc, 114 struct drm_crtc_state *old_crtc_state); 115 }; 116 117 /** 118 * struct drm_encoder_helper_funcs - helper operations for encoders 119 * @dpms: set power state 120 * @save: save connector state 121 * @restore: restore connector state 122 * @mode_fixup: try to fixup proposed mode for this connector 123 * @prepare: part of the disable sequence, called before the CRTC modeset 124 * @commit: called after the CRTC modeset 125 * @mode_set: set this mode, optional for atomic helpers 126 * @get_crtc: return CRTC that the encoder is currently attached to 127 * @detect: connection status detection 128 * @disable: disable encoder when not in use (overrides DPMS off) 129 * @enable: enable encoder 130 * @atomic_check: check for validity of an atomic update 131 * 132 * The helper operations are called by the mid-layer CRTC helper. 133 * 134 * Note that with atomic helpers @dpms, @prepare and @commit hooks are 135 * deprecated. Used @enable and @disable instead exclusively. 136 * 137 * With legacy crtc helpers there's a big semantic difference between @disable 138 * and the other hooks: @disable also needs to release any resources acquired in 139 * @mode_set (like shared PLLs). 140 */ 141 struct drm_encoder_helper_funcs { 142 void (*dpms)(struct drm_encoder *encoder, int mode); 143 void (*save)(struct drm_encoder *encoder); 144 void (*restore)(struct drm_encoder *encoder); 145 146 bool (*mode_fixup)(struct drm_encoder *encoder, 147 const struct drm_display_mode *mode, 148 struct drm_display_mode *adjusted_mode); 149 void (*prepare)(struct drm_encoder *encoder); 150 void (*commit)(struct drm_encoder *encoder); 151 void (*mode_set)(struct drm_encoder *encoder, 152 struct drm_display_mode *mode, 153 struct drm_display_mode *adjusted_mode); 154 struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder); 155 /* detect for DAC style encoders */ 156 enum drm_connector_status (*detect)(struct drm_encoder *encoder, 157 struct drm_connector *connector); 158 void (*disable)(struct drm_encoder *encoder); 159 160 void (*enable)(struct drm_encoder *encoder); 161 162 /* atomic helpers */ 163 int (*atomic_check)(struct drm_encoder *encoder, 164 struct drm_crtc_state *crtc_state, 165 struct drm_connector_state *conn_state); 166 }; 167 168 /** 169 * struct drm_connector_helper_funcs - helper operations for connectors 170 * @get_modes: get mode list for this connector 171 * @mode_valid: is this mode valid on the given connector? (optional) 172 * @best_encoder: return the preferred encoder for this connector 173 * @atomic_best_encoder: atomic version of @best_encoder 174 * 175 * The helper operations are called by the mid-layer CRTC helper. 176 */ 177 struct drm_connector_helper_funcs { 178 int (*get_modes)(struct drm_connector *connector); 179 enum drm_mode_status (*mode_valid)(struct drm_connector *connector, 180 struct drm_display_mode *mode); 181 struct drm_encoder *(*best_encoder)(struct drm_connector *connector); 182 struct drm_encoder *(*atomic_best_encoder)(struct drm_connector *connector, 183 struct drm_connector_state *connector_state); 184 }; 185 186 extern void drm_helper_disable_unused_functions(struct drm_device *dev); 187 extern int drm_crtc_helper_set_config(struct drm_mode_set *set); 188 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, 189 struct drm_display_mode *mode, 190 int x, int y, 191 struct drm_framebuffer *old_fb); 192 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc); 193 extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder); 194 195 extern int drm_helper_connector_dpms(struct drm_connector *connector, int mode); 196 197 extern void drm_helper_move_panel_connectors_to_head(struct drm_device *); 198 199 extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, 200 const struct drm_mode_fb_cmd2 *mode_cmd); 201 202 static inline void drm_crtc_helper_add(struct drm_crtc *crtc, 203 const struct drm_crtc_helper_funcs *funcs) 204 { 205 crtc->helper_private = __DECONST(void *, funcs); 206 } 207 208 static inline void drm_encoder_helper_add(struct drm_encoder *encoder, 209 const struct drm_encoder_helper_funcs *funcs) 210 { 211 encoder->helper_private = __DECONST(void *, funcs); 212 } 213 214 static inline void drm_connector_helper_add(struct drm_connector *connector, 215 const struct drm_connector_helper_funcs *funcs) 216 { 217 connector->helper_private = __DECONST(void *, funcs); 218 } 219 220 extern void drm_helper_resume_force_mode(struct drm_device *dev); 221 222 int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, 223 struct drm_display_mode *adjusted_mode, int x, int y, 224 struct drm_framebuffer *old_fb); 225 int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, 226 struct drm_framebuffer *old_fb); 227 228 /* drm_probe_helper.c */ 229 extern int drm_helper_probe_single_connector_modes(struct drm_connector 230 *connector, uint32_t maxX, 231 uint32_t maxY); 232 extern void drm_kms_helper_poll_init(struct drm_device *dev); 233 extern void drm_kms_helper_poll_fini(struct drm_device *dev); 234 extern bool drm_helper_hpd_irq_event(struct drm_device *dev); 235 extern void drm_kms_helper_hotplug_event(struct drm_device *dev); 236 237 extern void drm_kms_helper_poll_disable(struct drm_device *dev); 238 extern void drm_kms_helper_poll_enable(struct drm_device *dev); 239 extern void drm_kms_helper_poll_enable_locked(struct drm_device *dev); 240 241 extern bool drm_fetch_cmdline_mode_from_kenv(struct drm_connector *connector, 242 struct drm_cmdline_mode *cmdline_mode); 243 #endif 244