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 #include <drm/drm_encoder.h> 20 21 #include "exynos_drm_crtc.h" 22 #include "exynos_drm_drv.h" 23 #include "exynos_drm_plane.h" 24 25 static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc, 26 struct drm_crtc_state *old_state) 27 { 28 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 29 30 if (exynos_crtc->ops->enable) 31 exynos_crtc->ops->enable(exynos_crtc); 32 33 drm_crtc_vblank_on(crtc); 34 } 35 36 static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc, 37 struct drm_crtc_state *old_state) 38 { 39 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 40 41 drm_crtc_vblank_off(crtc); 42 43 if (exynos_crtc->ops->disable) 44 exynos_crtc->ops->disable(exynos_crtc); 45 46 if (crtc->state->event && !crtc->state->active) { 47 spin_lock_irq(&crtc->dev->event_lock); 48 drm_crtc_send_vblank_event(crtc, crtc->state->event); 49 spin_unlock_irq(&crtc->dev->event_lock); 50 51 crtc->state->event = NULL; 52 } 53 } 54 55 static int exynos_crtc_atomic_check(struct drm_crtc *crtc, 56 struct drm_crtc_state *state) 57 { 58 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 59 60 if (!state->enable) 61 return 0; 62 63 if (exynos_crtc->ops->atomic_check) 64 return exynos_crtc->ops->atomic_check(exynos_crtc, state); 65 66 return 0; 67 } 68 69 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 70 struct drm_crtc_state *old_crtc_state) 71 { 72 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 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 enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc, 88 const struct drm_display_mode *mode) 89 { 90 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 91 92 if (exynos_crtc->ops->mode_valid) 93 return exynos_crtc->ops->mode_valid(exynos_crtc, mode); 94 95 return MODE_OK; 96 } 97 98 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc, 99 const struct drm_display_mode *mode, 100 struct drm_display_mode *adjusted_mode) 101 { 102 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 103 104 if (exynos_crtc->ops->mode_fixup) 105 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode, 106 adjusted_mode); 107 108 return true; 109 } 110 111 112 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 113 .mode_valid = exynos_crtc_mode_valid, 114 .mode_fixup = exynos_crtc_mode_fixup, 115 .atomic_check = exynos_crtc_atomic_check, 116 .atomic_begin = exynos_crtc_atomic_begin, 117 .atomic_flush = exynos_crtc_atomic_flush, 118 .atomic_enable = exynos_drm_crtc_atomic_enable, 119 .atomic_disable = exynos_drm_crtc_atomic_disable, 120 }; 121 122 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc) 123 { 124 struct drm_crtc *crtc = &exynos_crtc->base; 125 struct drm_pending_vblank_event *event = crtc->state->event; 126 unsigned long flags; 127 128 if (!event) 129 return; 130 crtc->state->event = NULL; 131 132 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 133 134 spin_lock_irqsave(&crtc->dev->event_lock, flags); 135 drm_crtc_arm_vblank_event(crtc, event); 136 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 137 } 138 139 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 140 { 141 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 142 143 drm_crtc_cleanup(crtc); 144 kfree(exynos_crtc); 145 } 146 147 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc) 148 { 149 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 150 151 if (exynos_crtc->ops->enable_vblank) 152 return exynos_crtc->ops->enable_vblank(exynos_crtc); 153 154 return 0; 155 } 156 157 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc) 158 { 159 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 160 161 if (exynos_crtc->ops->disable_vblank) 162 exynos_crtc->ops->disable_vblank(exynos_crtc); 163 } 164 165 static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc) 166 { 167 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 168 169 if (exynos_crtc->ops->get_vblank_counter) 170 return exynos_crtc->ops->get_vblank_counter(exynos_crtc); 171 172 return 0; 173 } 174 175 static const struct drm_crtc_funcs exynos_crtc_funcs = { 176 .set_config = drm_atomic_helper_set_config, 177 .page_flip = drm_atomic_helper_page_flip, 178 .destroy = exynos_drm_crtc_destroy, 179 .reset = drm_atomic_helper_crtc_reset, 180 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 181 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 182 .enable_vblank = exynos_drm_crtc_enable_vblank, 183 .disable_vblank = exynos_drm_crtc_disable_vblank, 184 .get_vblank_counter = exynos_drm_crtc_get_vblank_counter, 185 }; 186 187 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 188 struct drm_plane *plane, 189 enum exynos_drm_output_type type, 190 const struct exynos_drm_crtc_ops *ops, 191 void *ctx) 192 { 193 struct exynos_drm_crtc *exynos_crtc; 194 struct drm_crtc *crtc; 195 int ret; 196 197 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 198 if (!exynos_crtc) 199 return ERR_PTR(-ENOMEM); 200 201 exynos_crtc->type = type; 202 exynos_crtc->ops = ops; 203 exynos_crtc->ctx = ctx; 204 205 crtc = &exynos_crtc->base; 206 207 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 208 &exynos_crtc_funcs, NULL); 209 if (ret < 0) 210 goto err_crtc; 211 212 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 213 214 return exynos_crtc; 215 216 err_crtc: 217 plane->funcs->destroy(plane); 218 kfree(exynos_crtc); 219 return ERR_PTR(ret); 220 } 221 222 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev, 223 enum exynos_drm_output_type out_type) 224 { 225 struct drm_crtc *crtc; 226 227 drm_for_each_crtc(crtc, drm_dev) 228 if (to_exynos_crtc(crtc)->type == out_type) 229 return to_exynos_crtc(crtc); 230 231 return ERR_PTR(-ENODEV); 232 } 233 234 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder, 235 enum exynos_drm_output_type out_type) 236 { 237 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev, 238 out_type); 239 240 if (IS_ERR(crtc)) 241 return PTR_ERR(crtc); 242 243 encoder->possible_crtcs = drm_crtc_mask(&crtc->base); 244 245 return 0; 246 } 247 248 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 249 { 250 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 251 252 if (exynos_crtc->ops->te_handler) 253 exynos_crtc->ops->te_handler(exynos_crtc); 254 } 255