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 struct drm_pending_vblank_event *event; 89 unsigned long flags; 90 91 if (exynos_crtc->ops->atomic_flush) 92 exynos_crtc->ops->atomic_flush(exynos_crtc); 93 94 event = crtc->state->event; 95 if (event) { 96 crtc->state->event = NULL; 97 98 spin_lock_irqsave(&crtc->dev->event_lock, flags); 99 if (drm_crtc_vblank_get(crtc) == 0) 100 drm_crtc_arm_vblank_event(crtc, event); 101 else 102 drm_crtc_send_vblank_event(crtc, event); 103 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 104 } 105 106 } 107 108 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 109 .enable = exynos_drm_crtc_enable, 110 .disable = exynos_drm_crtc_disable, 111 .mode_set_nofb = exynos_drm_crtc_mode_set_nofb, 112 .atomic_check = exynos_crtc_atomic_check, 113 .atomic_begin = exynos_crtc_atomic_begin, 114 .atomic_flush = exynos_crtc_atomic_flush, 115 }; 116 117 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 118 { 119 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 120 121 drm_crtc_cleanup(crtc); 122 kfree(exynos_crtc); 123 } 124 125 static const struct drm_crtc_funcs exynos_crtc_funcs = { 126 .set_config = drm_atomic_helper_set_config, 127 .page_flip = drm_atomic_helper_page_flip, 128 .destroy = exynos_drm_crtc_destroy, 129 .reset = drm_atomic_helper_crtc_reset, 130 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 131 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 132 }; 133 134 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 135 struct drm_plane *plane, 136 int pipe, 137 enum exynos_drm_output_type type, 138 const struct exynos_drm_crtc_ops *ops, 139 void *ctx) 140 { 141 struct exynos_drm_crtc *exynos_crtc; 142 struct drm_crtc *crtc; 143 int ret; 144 145 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 146 if (!exynos_crtc) 147 return ERR_PTR(-ENOMEM); 148 149 exynos_crtc->pipe = pipe; 150 exynos_crtc->type = type; 151 exynos_crtc->ops = ops; 152 exynos_crtc->ctx = ctx; 153 154 crtc = &exynos_crtc->base; 155 156 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 157 &exynos_crtc_funcs, NULL); 158 if (ret < 0) 159 goto err_crtc; 160 161 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 162 163 return exynos_crtc; 164 165 err_crtc: 166 plane->funcs->destroy(plane); 167 kfree(exynos_crtc); 168 return ERR_PTR(ret); 169 } 170 171 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 172 { 173 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev, 174 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, unsigned int pipe) 183 { 184 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev, 185 pipe); 186 187 if (exynos_crtc->ops->disable_vblank) 188 exynos_crtc->ops->disable_vblank(exynos_crtc); 189 } 190 191 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 192 enum exynos_drm_output_type out_type) 193 { 194 struct drm_crtc *crtc; 195 196 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 197 struct exynos_drm_crtc *exynos_crtc; 198 199 exynos_crtc = to_exynos_crtc(crtc); 200 if (exynos_crtc->type == out_type) 201 return exynos_crtc->pipe; 202 } 203 204 return -EPERM; 205 } 206 207 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 208 { 209 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 210 211 if (exynos_crtc->ops->te_handler) 212 exynos_crtc->ops->te_handler(exynos_crtc); 213 } 214