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 bool 45 exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc, 46 const struct drm_display_mode *mode, 47 struct drm_display_mode *adjusted_mode) 48 { 49 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 50 51 if (exynos_crtc->ops->mode_fixup) 52 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode, 53 adjusted_mode); 54 55 return true; 56 } 57 58 static void 59 exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc) 60 { 61 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 62 63 if (exynos_crtc->ops->commit) 64 exynos_crtc->ops->commit(exynos_crtc); 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 struct drm_plane *plane; 72 73 exynos_crtc->event = crtc->state->event; 74 75 drm_atomic_crtc_for_each_plane(plane, crtc) { 76 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 77 78 if (exynos_crtc->ops->atomic_begin) 79 exynos_crtc->ops->atomic_begin(exynos_crtc, 80 exynos_plane); 81 } 82 } 83 84 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc, 85 struct drm_crtc_state *old_crtc_state) 86 { 87 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 88 struct drm_plane *plane; 89 90 drm_atomic_crtc_for_each_plane(plane, crtc) { 91 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 92 93 if (exynos_crtc->ops->atomic_flush) 94 exynos_crtc->ops->atomic_flush(exynos_crtc, 95 exynos_plane); 96 } 97 } 98 99 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 100 .enable = exynos_drm_crtc_enable, 101 .disable = exynos_drm_crtc_disable, 102 .mode_fixup = exynos_drm_crtc_mode_fixup, 103 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb, 104 .atomic_begin = exynos_crtc_atomic_begin, 105 .atomic_flush = exynos_crtc_atomic_flush, 106 }; 107 108 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 109 { 110 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 111 struct exynos_drm_private *private = crtc->dev->dev_private; 112 113 private->crtc[exynos_crtc->pipe] = NULL; 114 115 drm_crtc_cleanup(crtc); 116 kfree(exynos_crtc); 117 } 118 119 static struct drm_crtc_funcs exynos_crtc_funcs = { 120 .set_config = drm_atomic_helper_set_config, 121 .page_flip = drm_atomic_helper_page_flip, 122 .destroy = exynos_drm_crtc_destroy, 123 .reset = drm_atomic_helper_crtc_reset, 124 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 125 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 126 }; 127 128 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 129 struct drm_plane *plane, 130 int pipe, 131 enum exynos_drm_output_type type, 132 const struct exynos_drm_crtc_ops *ops, 133 void *ctx) 134 { 135 struct exynos_drm_crtc *exynos_crtc; 136 struct exynos_drm_private *private = drm_dev->dev_private; 137 struct drm_crtc *crtc; 138 int ret; 139 140 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 141 if (!exynos_crtc) 142 return ERR_PTR(-ENOMEM); 143 144 exynos_crtc->pipe = pipe; 145 exynos_crtc->type = type; 146 exynos_crtc->ops = ops; 147 exynos_crtc->ctx = ctx; 148 149 init_waitqueue_head(&exynos_crtc->wait_update); 150 151 crtc = &exynos_crtc->base; 152 153 private->crtc[pipe] = crtc; 154 155 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 156 &exynos_crtc_funcs); 157 if (ret < 0) 158 goto err_crtc; 159 160 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 161 162 return exynos_crtc; 163 164 err_crtc: 165 plane->funcs->destroy(plane); 166 kfree(exynos_crtc); 167 return ERR_PTR(ret); 168 } 169 170 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, 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->enable_vblank) 177 return exynos_crtc->ops->enable_vblank(exynos_crtc); 178 179 return 0; 180 } 181 182 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe) 183 { 184 struct exynos_drm_private *private = dev->dev_private; 185 struct exynos_drm_crtc *exynos_crtc = 186 to_exynos_crtc(private->crtc[pipe]); 187 188 if (exynos_crtc->ops->disable_vblank) 189 exynos_crtc->ops->disable_vblank(exynos_crtc); 190 } 191 192 void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc) 193 { 194 wait_event_timeout(exynos_crtc->wait_update, 195 (atomic_read(&exynos_crtc->pending_update) == 0), 196 msecs_to_jiffies(50)); 197 } 198 199 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc, 200 struct exynos_drm_plane *exynos_plane) 201 { 202 struct drm_crtc *crtc = &exynos_crtc->base; 203 unsigned long flags; 204 205 exynos_plane->pending_fb = NULL; 206 207 if (atomic_dec_and_test(&exynos_crtc->pending_update)) 208 wake_up(&exynos_crtc->wait_update); 209 210 spin_lock_irqsave(&crtc->dev->event_lock, flags); 211 if (exynos_crtc->event) 212 drm_crtc_send_vblank_event(crtc, exynos_crtc->event); 213 214 exynos_crtc->event = NULL; 215 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 216 } 217 218 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb) 219 { 220 struct exynos_drm_crtc *exynos_crtc; 221 struct drm_device *dev = fb->dev; 222 struct drm_crtc *crtc; 223 224 /* 225 * make sure that overlay data are updated to real hardware 226 * for all encoders. 227 */ 228 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 229 exynos_crtc = to_exynos_crtc(crtc); 230 231 /* 232 * wait for vblank interrupt 233 * - this makes sure that overlay data are updated to 234 * real hardware. 235 */ 236 if (exynos_crtc->ops->wait_for_vblank) 237 exynos_crtc->ops->wait_for_vblank(exynos_crtc); 238 } 239 } 240 241 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 242 enum exynos_drm_output_type out_type) 243 { 244 struct drm_crtc *crtc; 245 246 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 247 struct exynos_drm_crtc *exynos_crtc; 248 249 exynos_crtc = to_exynos_crtc(crtc); 250 if (exynos_crtc->type == out_type) 251 return exynos_crtc->pipe; 252 } 253 254 return -EPERM; 255 } 256 257 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 258 { 259 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 260 261 if (exynos_crtc->ops->te_handler) 262 exynos_crtc->ops->te_handler(exynos_crtc); 263 } 264