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 crtc->state->event = NULL; 110 spin_lock_irqsave(&crtc->dev->event_lock, flags); 111 if (drm_crtc_vblank_get(crtc) == 0) 112 drm_crtc_arm_vblank_event(crtc, event); 113 else 114 drm_crtc_send_vblank_event(crtc, event); 115 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 116 } 117 118 } 119 120 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 121 { 122 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 123 124 drm_crtc_cleanup(crtc); 125 kfree(exynos_crtc); 126 } 127 128 static const struct drm_crtc_funcs exynos_crtc_funcs = { 129 .set_config = drm_atomic_helper_set_config, 130 .page_flip = drm_atomic_helper_page_flip, 131 .destroy = exynos_drm_crtc_destroy, 132 .reset = drm_atomic_helper_crtc_reset, 133 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 134 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 135 }; 136 137 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 138 struct drm_plane *plane, 139 int pipe, 140 enum exynos_drm_output_type type, 141 const struct exynos_drm_crtc_ops *ops, 142 void *ctx) 143 { 144 struct exynos_drm_crtc *exynos_crtc; 145 struct drm_crtc *crtc; 146 int ret; 147 148 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 149 if (!exynos_crtc) 150 return ERR_PTR(-ENOMEM); 151 152 exynos_crtc->pipe = pipe; 153 exynos_crtc->type = type; 154 exynos_crtc->ops = ops; 155 exynos_crtc->ctx = ctx; 156 157 crtc = &exynos_crtc->base; 158 159 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 160 &exynos_crtc_funcs, NULL); 161 if (ret < 0) 162 goto err_crtc; 163 164 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 165 166 return exynos_crtc; 167 168 err_crtc: 169 plane->funcs->destroy(plane); 170 kfree(exynos_crtc); 171 return ERR_PTR(ret); 172 } 173 174 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 175 { 176 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev, 177 pipe); 178 179 if (exynos_crtc->ops->enable_vblank) 180 return exynos_crtc->ops->enable_vblank(exynos_crtc); 181 182 return 0; 183 } 184 185 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe) 186 { 187 struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev, 188 pipe); 189 190 if (exynos_crtc->ops->disable_vblank) 191 exynos_crtc->ops->disable_vblank(exynos_crtc); 192 } 193 194 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 195 enum exynos_drm_output_type out_type) 196 { 197 struct drm_crtc *crtc; 198 199 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 200 struct exynos_drm_crtc *exynos_crtc; 201 202 exynos_crtc = to_exynos_crtc(crtc); 203 if (exynos_crtc->type == out_type) 204 return exynos_crtc->pipe; 205 } 206 207 return -EPERM; 208 } 209 210 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 211 { 212 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 213 214 if (exynos_crtc->ops->te_handler) 215 exynos_crtc->ops->te_handler(exynos_crtc); 216 } 217