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 if (crtc->state->event && !crtc->state->active) { 44 spin_lock_irq(&crtc->dev->event_lock); 45 drm_crtc_send_vblank_event(crtc, crtc->state->event); 46 spin_unlock_irq(&crtc->dev->event_lock); 47 48 crtc->state->event = NULL; 49 } 50 } 51 52 static void 53 exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc) 54 { 55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 56 57 if (exynos_crtc->ops->commit) 58 exynos_crtc->ops->commit(exynos_crtc); 59 } 60 61 static int exynos_crtc_atomic_check(struct drm_crtc *crtc, 62 struct drm_crtc_state *state) 63 { 64 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 65 66 if (!state->enable) 67 return 0; 68 69 if (exynos_crtc->ops->atomic_check) 70 return exynos_crtc->ops->atomic_check(exynos_crtc, state); 71 72 return 0; 73 } 74 75 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 76 struct drm_crtc_state *old_crtc_state) 77 { 78 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 79 80 if (exynos_crtc->ops->atomic_begin) 81 exynos_crtc->ops->atomic_begin(exynos_crtc); 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 89 if (exynos_crtc->ops->atomic_flush) 90 exynos_crtc->ops->atomic_flush(exynos_crtc); 91 } 92 93 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 94 .enable = exynos_drm_crtc_enable, 95 .disable = exynos_drm_crtc_disable, 96 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb, 97 .atomic_check = exynos_crtc_atomic_check, 98 .atomic_begin = exynos_crtc_atomic_begin, 99 .atomic_flush = exynos_crtc_atomic_flush, 100 }; 101 102 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc) 103 { 104 struct drm_crtc *crtc = &exynos_crtc->base; 105 struct drm_pending_vblank_event *event = crtc->state->event; 106 unsigned long flags; 107 108 if (!event) 109 return; 110 crtc->state->event = NULL; 111 112 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 113 114 spin_lock_irqsave(&crtc->dev->event_lock, flags); 115 drm_crtc_arm_vblank_event(crtc, event); 116 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 117 } 118 119 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 120 { 121 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 122 123 drm_crtc_cleanup(crtc); 124 kfree(exynos_crtc); 125 } 126 127 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc) 128 { 129 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 130 131 if (exynos_crtc->ops->enable_vblank) 132 return exynos_crtc->ops->enable_vblank(exynos_crtc); 133 134 return 0; 135 } 136 137 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc) 138 { 139 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 140 141 if (exynos_crtc->ops->disable_vblank) 142 exynos_crtc->ops->disable_vblank(exynos_crtc); 143 } 144 145 static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc) 146 { 147 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 148 149 if (exynos_crtc->ops->get_vblank_counter) 150 return exynos_crtc->ops->get_vblank_counter(exynos_crtc); 151 152 return 0; 153 } 154 155 static const struct drm_crtc_funcs exynos_crtc_funcs = { 156 .set_config = drm_atomic_helper_set_config, 157 .page_flip = drm_atomic_helper_page_flip, 158 .destroy = exynos_drm_crtc_destroy, 159 .reset = drm_atomic_helper_crtc_reset, 160 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 161 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 162 .enable_vblank = exynos_drm_crtc_enable_vblank, 163 .disable_vblank = exynos_drm_crtc_disable_vblank, 164 .get_vblank_counter = exynos_drm_crtc_get_vblank_counter, 165 }; 166 167 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 168 struct drm_plane *plane, 169 enum exynos_drm_output_type type, 170 const struct exynos_drm_crtc_ops *ops, 171 void *ctx) 172 { 173 struct exynos_drm_crtc *exynos_crtc; 174 struct drm_crtc *crtc; 175 int ret; 176 177 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 178 if (!exynos_crtc) 179 return ERR_PTR(-ENOMEM); 180 181 exynos_crtc->type = type; 182 exynos_crtc->ops = ops; 183 exynos_crtc->ctx = ctx; 184 185 crtc = &exynos_crtc->base; 186 187 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 188 &exynos_crtc_funcs, NULL); 189 if (ret < 0) 190 goto err_crtc; 191 192 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 193 194 return exynos_crtc; 195 196 err_crtc: 197 plane->funcs->destroy(plane); 198 kfree(exynos_crtc); 199 return ERR_PTR(ret); 200 } 201 202 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 203 enum exynos_drm_output_type out_type) 204 { 205 struct drm_crtc *crtc; 206 207 drm_for_each_crtc(crtc, drm_dev) 208 if (to_exynos_crtc(crtc)->type == out_type) 209 return drm_crtc_index(crtc); 210 211 return -EPERM; 212 } 213 214 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 215 { 216 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 217 218 if (exynos_crtc->ops->te_handler) 219 exynos_crtc->ops->te_handler(exynos_crtc); 220 } 221