1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* exynos_drm_crtc.c 3 * 4 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 5 * Authors: 6 * Inki Dae <inki.dae@samsung.com> 7 * Joonyoung Shim <jy0922.shim@samsung.com> 8 * Seung-Woo Kim <sw0312.kim@samsung.com> 9 */ 10 11 #include <drm/drm_atomic.h> 12 #include <drm/drm_atomic_helper.h> 13 #include <drm/drm_encoder.h> 14 #include <drm/drm_probe_helper.h> 15 #include <drm/drm_vblank.h> 16 17 #include "exynos_drm_crtc.h" 18 #include "exynos_drm_drv.h" 19 #include "exynos_drm_plane.h" 20 21 static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc, 22 struct drm_atomic_state *state) 23 { 24 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 25 26 if (exynos_crtc->ops->atomic_enable) 27 exynos_crtc->ops->atomic_enable(exynos_crtc); 28 29 drm_crtc_vblank_on(crtc); 30 } 31 32 static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc, 33 struct drm_atomic_state *state) 34 { 35 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 36 37 drm_crtc_vblank_off(crtc); 38 39 if (exynos_crtc->ops->atomic_disable) 40 exynos_crtc->ops->atomic_disable(exynos_crtc); 41 42 if (crtc->state->event && !crtc->state->active) { 43 spin_lock_irq(&crtc->dev->event_lock); 44 drm_crtc_send_vblank_event(crtc, crtc->state->event); 45 spin_unlock_irq(&crtc->dev->event_lock); 46 47 crtc->state->event = NULL; 48 } 49 } 50 51 static int exynos_crtc_atomic_check(struct drm_crtc *crtc, 52 struct drm_atomic_state *state) 53 { 54 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 55 crtc); 56 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 57 58 if (!crtc_state->enable) 59 return 0; 60 61 if (exynos_crtc->ops->atomic_check) 62 return exynos_crtc->ops->atomic_check(exynos_crtc, crtc_state); 63 64 return 0; 65 } 66 67 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 68 struct drm_atomic_state *state) 69 { 70 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 71 72 if (exynos_crtc->ops->atomic_begin) 73 exynos_crtc->ops->atomic_begin(exynos_crtc); 74 } 75 76 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc, 77 struct drm_atomic_state *state) 78 { 79 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 80 81 if (exynos_crtc->ops->atomic_flush) 82 exynos_crtc->ops->atomic_flush(exynos_crtc); 83 } 84 85 static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc, 86 const struct drm_display_mode *mode) 87 { 88 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 89 90 if (exynos_crtc->ops->mode_valid) 91 return exynos_crtc->ops->mode_valid(exynos_crtc, mode); 92 93 return MODE_OK; 94 } 95 96 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc, 97 const struct drm_display_mode *mode, 98 struct drm_display_mode *adjusted_mode) 99 { 100 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 101 102 if (exynos_crtc->ops->mode_fixup) 103 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode, 104 adjusted_mode); 105 106 return true; 107 } 108 109 110 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 111 .mode_valid = exynos_crtc_mode_valid, 112 .mode_fixup = exynos_crtc_mode_fixup, 113 .atomic_check = exynos_crtc_atomic_check, 114 .atomic_begin = exynos_crtc_atomic_begin, 115 .atomic_flush = exynos_crtc_atomic_flush, 116 .atomic_enable = exynos_drm_crtc_atomic_enable, 117 .atomic_disable = exynos_drm_crtc_atomic_disable, 118 }; 119 120 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc) 121 { 122 struct drm_crtc *crtc = &exynos_crtc->base; 123 struct drm_pending_vblank_event *event = crtc->state->event; 124 unsigned long flags; 125 126 if (!event) 127 return; 128 crtc->state->event = NULL; 129 130 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 131 132 spin_lock_irqsave(&crtc->dev->event_lock, flags); 133 drm_crtc_arm_vblank_event(crtc, event); 134 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 135 } 136 137 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 138 { 139 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 140 141 drm_crtc_cleanup(crtc); 142 kfree(exynos_crtc); 143 } 144 145 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc) 146 { 147 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 148 149 if (exynos_crtc->ops->enable_vblank) 150 return exynos_crtc->ops->enable_vblank(exynos_crtc); 151 152 return 0; 153 } 154 155 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc) 156 { 157 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 158 159 if (exynos_crtc->ops->disable_vblank) 160 exynos_crtc->ops->disable_vblank(exynos_crtc); 161 } 162 163 static const struct drm_crtc_funcs exynos_crtc_funcs = { 164 .set_config = drm_atomic_helper_set_config, 165 .page_flip = drm_atomic_helper_page_flip, 166 .destroy = exynos_drm_crtc_destroy, 167 .reset = drm_atomic_helper_crtc_reset, 168 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 169 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 170 .enable_vblank = exynos_drm_crtc_enable_vblank, 171 .disable_vblank = exynos_drm_crtc_disable_vblank, 172 }; 173 174 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 175 struct drm_plane *plane, 176 enum exynos_drm_output_type type, 177 const struct exynos_drm_crtc_ops *ops, 178 void *ctx) 179 { 180 struct exynos_drm_crtc *exynos_crtc; 181 struct drm_crtc *crtc; 182 int ret; 183 184 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 185 if (!exynos_crtc) 186 return ERR_PTR(-ENOMEM); 187 188 exynos_crtc->type = type; 189 exynos_crtc->ops = ops; 190 exynos_crtc->ctx = ctx; 191 192 crtc = &exynos_crtc->base; 193 194 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 195 &exynos_crtc_funcs, NULL); 196 if (ret < 0) 197 goto err_crtc; 198 199 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 200 201 return exynos_crtc; 202 203 err_crtc: 204 plane->funcs->destroy(plane); 205 kfree(exynos_crtc); 206 return ERR_PTR(ret); 207 } 208 209 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev, 210 enum exynos_drm_output_type out_type) 211 { 212 struct drm_crtc *crtc; 213 214 drm_for_each_crtc(crtc, drm_dev) 215 if (to_exynos_crtc(crtc)->type == out_type) 216 return to_exynos_crtc(crtc); 217 218 return ERR_PTR(-ENODEV); 219 } 220 221 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder, 222 enum exynos_drm_output_type out_type) 223 { 224 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev, 225 out_type); 226 227 if (IS_ERR(crtc)) 228 return PTR_ERR(crtc); 229 230 encoder->possible_crtcs = drm_crtc_mask(&crtc->base); 231 232 return 0; 233 } 234 235 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 236 { 237 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 238 239 if (exynos_crtc->ops->te_handler) 240 exynos_crtc->ops->te_handler(exynos_crtc); 241 } 242