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 if (exynos_crtc->ops->atomic_begin) 73 exynos_crtc->ops->atomic_begin(exynos_crtc); 74 } 75 76 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc, 77 struct drm_crtc_state *old_crtc_state) 78 { 79 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 80 struct drm_pending_vblank_event *event; 81 unsigned long flags; 82 83 if (exynos_crtc->ops->atomic_flush) 84 exynos_crtc->ops->atomic_flush(exynos_crtc); 85 86 event = crtc->state->event; 87 if (event) { 88 crtc->state->event = NULL; 89 90 spin_lock_irqsave(&crtc->dev->event_lock, flags); 91 if (drm_crtc_vblank_get(crtc) == 0) 92 drm_crtc_arm_vblank_event(crtc, event); 93 else 94 drm_crtc_send_vblank_event(crtc, event); 95 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 96 } 97 98 } 99 100 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 101 .enable = exynos_drm_crtc_enable, 102 .disable = exynos_drm_crtc_disable, 103 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb, 104 .atomic_check = exynos_crtc_atomic_check, 105 .atomic_begin = exynos_crtc_atomic_begin, 106 .atomic_flush = exynos_crtc_atomic_flush, 107 }; 108 109 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 110 { 111 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 112 struct exynos_drm_private *private = crtc->dev->dev_private; 113 114 private->crtc[exynos_crtc->pipe] = NULL; 115 116 drm_crtc_cleanup(crtc); 117 kfree(exynos_crtc); 118 } 119 120 static const struct drm_crtc_funcs exynos_crtc_funcs = { 121 .set_config = drm_atomic_helper_set_config, 122 .page_flip = drm_atomic_helper_page_flip, 123 .destroy = exynos_drm_crtc_destroy, 124 .reset = drm_atomic_helper_crtc_reset, 125 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 126 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 127 }; 128 129 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 130 struct drm_plane *plane, 131 int pipe, 132 enum exynos_drm_output_type type, 133 const struct exynos_drm_crtc_ops *ops, 134 void *ctx) 135 { 136 struct exynos_drm_crtc *exynos_crtc; 137 struct exynos_drm_private *private = drm_dev->dev_private; 138 struct drm_crtc *crtc; 139 int ret; 140 141 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 142 if (!exynos_crtc) 143 return ERR_PTR(-ENOMEM); 144 145 exynos_crtc->pipe = pipe; 146 exynos_crtc->type = type; 147 exynos_crtc->ops = ops; 148 exynos_crtc->ctx = ctx; 149 150 crtc = &exynos_crtc->base; 151 152 private->crtc[pipe] = crtc; 153 154 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 155 &exynos_crtc_funcs, NULL); 156 if (ret < 0) 157 goto err_crtc; 158 159 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 160 161 return exynos_crtc; 162 163 err_crtc: 164 plane->funcs->destroy(plane); 165 kfree(exynos_crtc); 166 return ERR_PTR(ret); 167 } 168 169 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 170 { 171 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev, 172 pipe); 173 174 if (exynos_crtc->ops->enable_vblank) 175 return exynos_crtc->ops->enable_vblank(exynos_crtc); 176 177 return 0; 178 } 179 180 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe) 181 { 182 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev, 183 pipe); 184 185 if (exynos_crtc->ops->disable_vblank) 186 exynos_crtc->ops->disable_vblank(exynos_crtc); 187 } 188 189 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 190 enum exynos_drm_output_type out_type) 191 { 192 struct drm_crtc *crtc; 193 194 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 195 struct exynos_drm_crtc *exynos_crtc; 196 197 exynos_crtc = to_exynos_crtc(crtc); 198 if (exynos_crtc->type == out_type) 199 return exynos_crtc->pipe; 200 } 201 202 return -EPERM; 203 } 204 205 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 206 { 207 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 208 209 if (exynos_crtc->ops->te_handler) 210 exynos_crtc->ops->te_handler(exynos_crtc); 211 } 212 213 void exynos_drm_crtc_cancel_page_flip(struct drm_crtc *crtc, 214 struct drm_file *file) 215 { 216 struct drm_pending_vblank_event *e; 217 unsigned long flags; 218 219 spin_lock_irqsave(&crtc->dev->event_lock, flags); 220 221 e = crtc->state->event; 222 if (e && e->base.file_priv == file) 223 crtc->state->event = NULL; 224 else 225 e = NULL; 226 227 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 228 229 if (e) 230 drm_event_cancel_free(crtc->dev, &e->base); 231 } 232