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 (exynos_crtc->ops->atomic_check) 59 return exynos_crtc->ops->atomic_check(exynos_crtc, state); 60 61 return 0; 62 } 63 64 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 65 struct drm_crtc_state *old_crtc_state) 66 { 67 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 68 struct drm_plane *plane; 69 70 exynos_crtc->event = crtc->state->event; 71 72 drm_atomic_crtc_for_each_plane(plane, crtc) { 73 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 74 75 if (exynos_crtc->ops->atomic_begin) 76 exynos_crtc->ops->atomic_begin(exynos_crtc, 77 exynos_plane); 78 } 79 } 80 81 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc, 82 struct drm_crtc_state *old_crtc_state) 83 { 84 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 85 struct drm_plane *plane; 86 87 drm_atomic_crtc_for_each_plane(plane, crtc) { 88 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 89 90 if (exynos_crtc->ops->atomic_flush) 91 exynos_crtc->ops->atomic_flush(exynos_crtc, 92 exynos_plane); 93 } 94 } 95 96 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 97 .enable = exynos_drm_crtc_enable, 98 .disable = exynos_drm_crtc_disable, 99 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb, 100 .atomic_check = exynos_crtc_atomic_check, 101 .atomic_begin = exynos_crtc_atomic_begin, 102 .atomic_flush = exynos_crtc_atomic_flush, 103 }; 104 105 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 106 { 107 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 108 struct exynos_drm_private *private = crtc->dev->dev_private; 109 110 private->crtc[exynos_crtc->pipe] = NULL; 111 112 drm_crtc_cleanup(crtc); 113 kfree(exynos_crtc); 114 } 115 116 static struct drm_crtc_funcs exynos_crtc_funcs = { 117 .set_config = drm_atomic_helper_set_config, 118 .page_flip = drm_atomic_helper_page_flip, 119 .destroy = exynos_drm_crtc_destroy, 120 .reset = drm_atomic_helper_crtc_reset, 121 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 122 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 123 }; 124 125 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 126 struct drm_plane *plane, 127 int pipe, 128 enum exynos_drm_output_type type, 129 const struct exynos_drm_crtc_ops *ops, 130 void *ctx) 131 { 132 struct exynos_drm_crtc *exynos_crtc; 133 struct exynos_drm_private *private = drm_dev->dev_private; 134 struct drm_crtc *crtc; 135 int ret; 136 137 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 138 if (!exynos_crtc) 139 return ERR_PTR(-ENOMEM); 140 141 exynos_crtc->pipe = pipe; 142 exynos_crtc->type = type; 143 exynos_crtc->ops = ops; 144 exynos_crtc->ctx = ctx; 145 146 init_waitqueue_head(&exynos_crtc->wait_update); 147 148 crtc = &exynos_crtc->base; 149 150 private->crtc[pipe] = crtc; 151 152 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 153 &exynos_crtc_funcs); 154 if (ret < 0) 155 goto err_crtc; 156 157 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 158 159 return exynos_crtc; 160 161 err_crtc: 162 plane->funcs->destroy(plane); 163 kfree(exynos_crtc); 164 return ERR_PTR(ret); 165 } 166 167 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 168 { 169 struct exynos_drm_private *private = dev->dev_private; 170 struct exynos_drm_crtc *exynos_crtc = 171 to_exynos_crtc(private->crtc[pipe]); 172 173 if (exynos_crtc->ops->enable_vblank) 174 return exynos_crtc->ops->enable_vblank(exynos_crtc); 175 176 return 0; 177 } 178 179 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe) 180 { 181 struct exynos_drm_private *private = dev->dev_private; 182 struct exynos_drm_crtc *exynos_crtc = 183 to_exynos_crtc(private->crtc[pipe]); 184 185 if (exynos_crtc->ops->disable_vblank) 186 exynos_crtc->ops->disable_vblank(exynos_crtc); 187 } 188 189 void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc) 190 { 191 wait_event_timeout(exynos_crtc->wait_update, 192 (atomic_read(&exynos_crtc->pending_update) == 0), 193 msecs_to_jiffies(50)); 194 } 195 196 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc, 197 struct exynos_drm_plane *exynos_plane) 198 { 199 struct drm_crtc *crtc = &exynos_crtc->base; 200 unsigned long flags; 201 202 exynos_plane->pending_fb = NULL; 203 204 if (atomic_dec_and_test(&exynos_crtc->pending_update)) 205 wake_up(&exynos_crtc->wait_update); 206 207 spin_lock_irqsave(&crtc->dev->event_lock, flags); 208 if (exynos_crtc->event) 209 drm_crtc_send_vblank_event(crtc, exynos_crtc->event); 210 211 exynos_crtc->event = NULL; 212 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 213 } 214 215 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb) 216 { 217 struct exynos_drm_crtc *exynos_crtc; 218 struct drm_device *dev = fb->dev; 219 struct drm_crtc *crtc; 220 221 /* 222 * make sure that overlay data are updated to real hardware 223 * for all encoders. 224 */ 225 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 226 exynos_crtc = to_exynos_crtc(crtc); 227 228 /* 229 * wait for vblank interrupt 230 * - this makes sure that overlay data are updated to 231 * real hardware. 232 */ 233 if (exynos_crtc->ops->wait_for_vblank) 234 exynos_crtc->ops->wait_for_vblank(exynos_crtc); 235 } 236 } 237 238 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 239 enum exynos_drm_output_type out_type) 240 { 241 struct drm_crtc *crtc; 242 243 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 244 struct exynos_drm_crtc *exynos_crtc; 245 246 exynos_crtc = to_exynos_crtc(crtc); 247 if (exynos_crtc->type == out_type) 248 return exynos_crtc->pipe; 249 } 250 251 return -EPERM; 252 } 253 254 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 255 { 256 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 257 258 if (exynos_crtc->ops->te_handler) 259 exynos_crtc->ops->te_handler(exynos_crtc); 260 } 261