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 24static 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 34static 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 44static void 45exynos_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 53static 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 67static 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 84static 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 99static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 100 .enable = exynos_drm_crtc_enable, 101 .disable = exynos_drm_crtc_disable, 102 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb, 103 .atomic_check = exynos_crtc_atomic_check, 104 .atomic_begin = exynos_crtc_atomic_begin, 105 .atomic_flush = exynos_crtc_atomic_flush, 106}; 107 108static 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 119static 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 128struct 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 164err_crtc: 165 plane->funcs->destroy(plane); 166 kfree(exynos_crtc); 167 return ERR_PTR(ret); 168} 169 170int exynos_drm_crtc_enable_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->enable_vblank) 177 return exynos_crtc->ops->enable_vblank(exynos_crtc); 178 179 return 0; 180} 181 182void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned 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 192void 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 199void 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 218void 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 241int 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 257void 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