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/i2c.h> 37 #include <linux/spinlock.h> 38 #include <linux/types.h> 39 #include <linux/idr.h> 40 41 #include <linux/fb.h> 42 43 struct 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 void (*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 void (*mode_set_base)(struct drm_crtc *crtc, int x, int y, 63 struct drm_framebuffer *old_fb); 64 }; 65 66 struct drm_encoder_helper_funcs { 67 void (*dpms)(struct drm_encoder *encoder, int mode); 68 void (*save)(struct drm_encoder *encoder); 69 void (*restore)(struct drm_encoder *encoder); 70 71 bool (*mode_fixup)(struct drm_encoder *encoder, 72 struct drm_display_mode *mode, 73 struct drm_display_mode *adjusted_mode); 74 void (*prepare)(struct drm_encoder *encoder); 75 void (*commit)(struct drm_encoder *encoder); 76 void (*mode_set)(struct drm_encoder *encoder, 77 struct drm_display_mode *mode, 78 struct drm_display_mode *adjusted_mode); 79 /* detect for DAC style encoders */ 80 enum drm_connector_status (*detect)(struct drm_encoder *encoder, 81 struct drm_connector *connector); 82 }; 83 84 struct drm_connector_helper_funcs { 85 int (*get_modes)(struct drm_connector *connector); 86 int (*mode_valid)(struct drm_connector *connector, 87 struct drm_display_mode *mode); 88 struct drm_encoder *(*best_encoder)(struct drm_connector *connector); 89 }; 90 91 extern void drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY); 92 extern void drm_helper_disable_unused_functions(struct drm_device *dev); 93 extern int drm_helper_hotplug_stage_two(struct drm_device *dev); 94 extern bool drm_helper_initial_config(struct drm_device *dev, bool can_grow); 95 extern int drm_crtc_helper_set_config(struct drm_mode_set *set); 96 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, 97 struct drm_display_mode *mode, 98 int x, int y, 99 struct drm_framebuffer *old_fb); 100 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc); 101 102 extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, 103 struct drm_mode_fb_cmd *mode_cmd); 104 105 static inline void drm_crtc_helper_add(struct drm_crtc *crtc, 106 const struct drm_crtc_helper_funcs *funcs) 107 { 108 crtc->helper_private = (void *)funcs; 109 } 110 111 static inline void drm_encoder_helper_add(struct drm_encoder *encoder, 112 const struct drm_encoder_helper_funcs *funcs) 113 { 114 encoder->helper_private = (void *)funcs; 115 } 116 117 static inline void drm_connector_helper_add(struct drm_connector *connector, 118 const struct drm_connector_helper_funcs *funcs) 119 { 120 connector->helper_private = (void *)funcs; 121 } 122 123 extern int drm_helper_resume_force_mode(struct drm_device *dev); 124 #endif 125