1 /* exynos_drm_crtc.c 2 * 3 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 4 * Authors: 5 * Inki Dae <inki.dae@samsung.com> 6 * Joonyoung Shim <jy0922.shim@samsung.com> 7 * Seung-Woo Kim <sw0312.kim@samsung.com> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 */ 14 15 #include <drm/drmP.h> 16 #include <drm/drm_crtc_helper.h> 17 #include <drm/drm_atomic.h> 18 #include <drm/drm_atomic_helper.h> 19 20 #include "exynos_drm_crtc.h" 21 #include "exynos_drm_drv.h" 22 #include "exynos_drm_plane.h" 23 24 static void exynos_drm_crtc_enable(struct drm_crtc *crtc) 25 { 26 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 27 28 if (exynos_crtc->ops->enable) 29 exynos_crtc->ops->enable(exynos_crtc); 30 31 drm_crtc_vblank_on(crtc); 32 } 33 34 static void exynos_drm_crtc_disable(struct drm_crtc *crtc) 35 { 36 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 37 38 drm_crtc_vblank_off(crtc); 39 40 if (exynos_crtc->ops->disable) 41 exynos_crtc->ops->disable(exynos_crtc); 42 } 43 44 static void 45 exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc) 46 { 47 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 48 49 if (exynos_crtc->ops->commit) 50 exynos_crtc->ops->commit(exynos_crtc); 51 } 52 53 static int exynos_crtc_atomic_check(struct drm_crtc *crtc, 54 struct drm_crtc_state *state) 55 { 56 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 57 58 if (!state->enable) 59 return 0; 60 61 if (exynos_crtc->ops->atomic_check) 62 return exynos_crtc->ops->atomic_check(exynos_crtc, state); 63 64 return 0; 65 } 66 67 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 68 struct drm_crtc_state *old_crtc_state) 69 { 70 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 71 72 exynos_crtc->event = crtc->state->event; 73 74 if (exynos_crtc->ops->atomic_begin) 75 exynos_crtc->ops->atomic_begin(exynos_crtc); 76 } 77 78 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc, 79 struct drm_crtc_state *old_crtc_state) 80 { 81 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 82 83 if (exynos_crtc->ops->atomic_flush) 84 exynos_crtc->ops->atomic_flush(exynos_crtc); 85 } 86 87 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 88 .enable = exynos_drm_crtc_enable, 89 .disable = exynos_drm_crtc_disable, 90 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb, 91 .atomic_check = exynos_crtc_atomic_check, 92 .atomic_begin = exynos_crtc_atomic_begin, 93 .atomic_flush = exynos_crtc_atomic_flush, 94 }; 95 96 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 97 { 98 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 99 struct exynos_drm_private *private = crtc->dev->dev_private; 100 101 private->crtc[exynos_crtc->pipe] = NULL; 102 103 drm_crtc_cleanup(crtc); 104 kfree(exynos_crtc); 105 } 106 107 static const struct drm_crtc_funcs exynos_crtc_funcs = { 108 .set_config = drm_atomic_helper_set_config, 109 .page_flip = drm_atomic_helper_page_flip, 110 .destroy = exynos_drm_crtc_destroy, 111 .reset = drm_atomic_helper_crtc_reset, 112 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 113 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 114 }; 115 116 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 117 struct drm_plane *plane, 118 int pipe, 119 enum exynos_drm_output_type type, 120 const struct exynos_drm_crtc_ops *ops, 121 void *ctx) 122 { 123 struct exynos_drm_crtc *exynos_crtc; 124 struct exynos_drm_private *private = drm_dev->dev_private; 125 struct drm_crtc *crtc; 126 int ret; 127 128 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 129 if (!exynos_crtc) 130 return ERR_PTR(-ENOMEM); 131 132 exynos_crtc->pipe = pipe; 133 exynos_crtc->type = type; 134 exynos_crtc->ops = ops; 135 exynos_crtc->ctx = ctx; 136 137 init_waitqueue_head(&exynos_crtc->wait_update); 138 139 crtc = &exynos_crtc->base; 140 141 private->crtc[pipe] = crtc; 142 143 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 144 &exynos_crtc_funcs, NULL); 145 if (ret < 0) 146 goto err_crtc; 147 148 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 149 150 return exynos_crtc; 151 152 err_crtc: 153 plane->funcs->destroy(plane); 154 kfree(exynos_crtc); 155 return ERR_PTR(ret); 156 } 157 158 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 159 { 160 struct exynos_drm_private *private = dev->dev_private; 161 struct exynos_drm_crtc *exynos_crtc = 162 to_exynos_crtc(private->crtc[pipe]); 163 164 if (exynos_crtc->ops->enable_vblank) 165 return exynos_crtc->ops->enable_vblank(exynos_crtc); 166 167 return 0; 168 } 169 170 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe) 171 { 172 struct exynos_drm_private *private = dev->dev_private; 173 struct exynos_drm_crtc *exynos_crtc = 174 to_exynos_crtc(private->crtc[pipe]); 175 176 if (exynos_crtc->ops->disable_vblank) 177 exynos_crtc->ops->disable_vblank(exynos_crtc); 178 } 179 180 void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc) 181 { 182 wait_event_timeout(exynos_crtc->wait_update, 183 (atomic_read(&exynos_crtc->pending_update) == 0), 184 msecs_to_jiffies(50)); 185 } 186 187 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc, 188 struct exynos_drm_plane *exynos_plane) 189 { 190 struct drm_crtc *crtc = &exynos_crtc->base; 191 unsigned long flags; 192 193 exynos_plane->pending_fb = NULL; 194 195 if (atomic_dec_and_test(&exynos_crtc->pending_update)) 196 wake_up(&exynos_crtc->wait_update); 197 198 spin_lock_irqsave(&crtc->dev->event_lock, flags); 199 if (exynos_crtc->event) 200 drm_crtc_send_vblank_event(crtc, exynos_crtc->event); 201 202 exynos_crtc->event = NULL; 203 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 204 } 205 206 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 207 enum exynos_drm_output_type out_type) 208 { 209 struct drm_crtc *crtc; 210 211 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 212 struct exynos_drm_crtc *exynos_crtc; 213 214 exynos_crtc = to_exynos_crtc(crtc); 215 if (exynos_crtc->type == out_type) 216 return exynos_crtc->pipe; 217 } 218 219 return -EPERM; 220 } 221 222 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 223 { 224 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 225 226 if (exynos_crtc->ops->te_handler) 227 exynos_crtc->ops->te_handler(exynos_crtc); 228 } 229 230 void exynos_drm_crtc_cancel_page_flip(struct drm_crtc *crtc, 231 struct drm_file *file) 232 { 233 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 234 struct drm_pending_vblank_event *e; 235 unsigned long flags; 236 237 spin_lock_irqsave(&crtc->dev->event_lock, flags); 238 e = exynos_crtc->event; 239 if (e && e->base.file_priv == file) { 240 exynos_crtc->event = NULL; 241 /* 242 * event will be destroyed by core part 243 * so below line should be removed later with core changes 244 */ 245 e->base.destroy(&e->base); 246 /* 247 * event_space will be increased by core part 248 * so below line should be removed later with core changes. 249 */ 250 file->event_space += sizeof(e->event); 251 atomic_dec(&exynos_crtc->pending_update); 252 } 253 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 254 } 255