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 42struct drm_crtc_helper_funcs { 43 /* 44 * Control power levels on the CRTC. If the mode passed in is 45 * unsupported, the provider must use the next lowest power level. 46 */ 47 void (*dpms)(struct drm_crtc *crtc, int mode); 48 void (*prepare)(struct drm_crtc *crtc); 49 void (*commit)(struct drm_crtc *crtc); 50 51 /* Provider can fixup or change mode timings before modeset occurs */ 52 bool (*mode_fixup)(struct drm_crtc *crtc, 53 struct drm_display_mode *mode, 54 struct drm_display_mode *adjusted_mode); 55 /* Actually set the mode */ 56 int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode, 57 struct drm_display_mode *adjusted_mode, int x, int y, 58 struct drm_framebuffer *old_fb); 59 60 /* Move the crtc on the current fb to the given position *optional* */ 61 int (*mode_set_base)(struct drm_crtc *crtc, int x, int y, 62 struct drm_framebuffer *old_fb); 63 int (*mode_set_base_atomic)(struct drm_crtc *crtc, 64 struct drm_framebuffer *fb, int x, int y); 65 66 /* reload the current crtc LUT */ 67 void (*load_lut)(struct drm_crtc *crtc); 68 69 /* disable crtc when not in use - more explicit than dpms off */ 70 void (*disable)(struct drm_crtc *crtc); 71}; 72 73struct drm_encoder_helper_funcs { 74 void (*dpms)(struct drm_encoder *encoder, int mode); 75 void (*save)(struct drm_encoder *encoder); 76 void (*restore)(struct drm_encoder *encoder); 77 78 bool (*mode_fixup)(struct drm_encoder *encoder, 79 struct drm_display_mode *mode, 80 struct drm_display_mode *adjusted_mode); 81 void (*prepare)(struct drm_encoder *encoder); 82 void (*commit)(struct drm_encoder *encoder); 83 void (*mode_set)(struct drm_encoder *encoder, 84 struct drm_display_mode *mode, 85 struct drm_display_mode *adjusted_mode); 86 struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder); 87 /* detect for DAC style encoders */ 88 enum drm_connector_status (*detect)(struct drm_encoder *encoder, 89 struct drm_connector *connector); 90 /* disable encoder when not in use - more explicit than dpms off */ 91 void (*disable)(struct drm_encoder *encoder); 92}; 93 94struct drm_connector_helper_funcs { 95 int (*get_modes)(struct drm_connector *connector); 96 int (*mode_valid)(struct drm_connector *connector, 97 struct drm_display_mode *mode); 98 struct drm_encoder *(*best_encoder)(struct drm_connector *connector); 99}; 100 101extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY); 102extern void drm_helper_disable_unused_functions(struct drm_device *dev); 103extern int drm_crtc_helper_set_config(struct drm_mode_set *set); 104extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, 105 struct drm_display_mode *mode, 106 int x, int y, 107 struct drm_framebuffer *old_fb); 108extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc); 109extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder); 110 111extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode); 112 113extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, 114 struct drm_mode_fb_cmd *mode_cmd); 115 116static inline void drm_crtc_helper_add(struct drm_crtc *crtc, 117 const struct drm_crtc_helper_funcs *funcs) 118{ 119 crtc->helper_private = (void *)funcs; 120} 121 122static inline void drm_encoder_helper_add(struct drm_encoder *encoder, 123 const struct drm_encoder_helper_funcs *funcs) 124{ 125 encoder->helper_private = (void *)funcs; 126} 127 128static inline void drm_connector_helper_add(struct drm_connector *connector, 129 const struct drm_connector_helper_funcs *funcs) 130{ 131 connector->helper_private = (void *)funcs; 132} 133 134extern int drm_helper_resume_force_mode(struct drm_device *dev); 135extern void drm_kms_helper_poll_init(struct drm_device *dev); 136extern void drm_kms_helper_poll_fini(struct drm_device *dev); 137extern void drm_helper_hpd_irq_event(struct drm_device *dev); 138 139extern void drm_kms_helper_poll_disable(struct drm_device *dev); 140extern void drm_kms_helper_poll_enable(struct drm_device *dev); 141#endif 142