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 const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 99 .mode_valid = exynos_crtc_mode_valid, 100 .atomic_check = exynos_crtc_atomic_check, 101 .atomic_begin = exynos_crtc_atomic_begin, 102 .atomic_flush = exynos_crtc_atomic_flush, 103 .atomic_enable = exynos_drm_crtc_atomic_enable, 104 .atomic_disable = exynos_drm_crtc_atomic_disable, 105 }; 106 107 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc) 108 { 109 struct drm_crtc *crtc = &exynos_crtc->base; 110 struct drm_pending_vblank_event *event = crtc->state->event; 111 unsigned long flags; 112 113 if (!event) 114 return; 115 crtc->state->event = NULL; 116 117 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 118 119 spin_lock_irqsave(&crtc->dev->event_lock, flags); 120 drm_crtc_arm_vblank_event(crtc, event); 121 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 122 } 123 124 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 125 { 126 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 127 128 drm_crtc_cleanup(crtc); 129 kfree(exynos_crtc); 130 } 131 132 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc) 133 { 134 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 135 136 if (exynos_crtc->ops->enable_vblank) 137 return exynos_crtc->ops->enable_vblank(exynos_crtc); 138 139 return 0; 140 } 141 142 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc) 143 { 144 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 145 146 if (exynos_crtc->ops->disable_vblank) 147 exynos_crtc->ops->disable_vblank(exynos_crtc); 148 } 149 150 static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc) 151 { 152 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 153 154 if (exynos_crtc->ops->get_vblank_counter) 155 return exynos_crtc->ops->get_vblank_counter(exynos_crtc); 156 157 return 0; 158 } 159 160 static const struct drm_crtc_funcs exynos_crtc_funcs = { 161 .set_config = drm_atomic_helper_set_config, 162 .page_flip = drm_atomic_helper_page_flip, 163 .destroy = exynos_drm_crtc_destroy, 164 .reset = drm_atomic_helper_crtc_reset, 165 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 166 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 167 .enable_vblank = exynos_drm_crtc_enable_vblank, 168 .disable_vblank = exynos_drm_crtc_disable_vblank, 169 .get_vblank_counter = exynos_drm_crtc_get_vblank_counter, 170 }; 171 172 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 173 struct drm_plane *plane, 174 enum exynos_drm_output_type type, 175 const struct exynos_drm_crtc_ops *ops, 176 void *ctx) 177 { 178 struct exynos_drm_crtc *exynos_crtc; 179 struct drm_crtc *crtc; 180 int ret; 181 182 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 183 if (!exynos_crtc) 184 return ERR_PTR(-ENOMEM); 185 186 exynos_crtc->type = type; 187 exynos_crtc->ops = ops; 188 exynos_crtc->ctx = ctx; 189 190 crtc = &exynos_crtc->base; 191 192 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 193 &exynos_crtc_funcs, NULL); 194 if (ret < 0) 195 goto err_crtc; 196 197 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 198 199 return exynos_crtc; 200 201 err_crtc: 202 plane->funcs->destroy(plane); 203 kfree(exynos_crtc); 204 return ERR_PTR(ret); 205 } 206 207 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev, 208 enum exynos_drm_output_type out_type) 209 { 210 struct drm_crtc *crtc; 211 212 drm_for_each_crtc(crtc, drm_dev) 213 if (to_exynos_crtc(crtc)->type == out_type) 214 return to_exynos_crtc(crtc); 215 216 return ERR_PTR(-EPERM); 217 } 218 219 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder, 220 enum exynos_drm_output_type out_type) 221 { 222 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev, 223 out_type); 224 225 if (IS_ERR(crtc)) 226 return PTR_ERR(crtc); 227 228 encoder->possible_crtcs = drm_crtc_mask(&crtc->base); 229 230 return 0; 231 } 232 233 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 234 { 235 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 236 237 if (exynos_crtc->ops->te_handler) 238 exynos_crtc->ops->te_handler(exynos_crtc); 239 } 240