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 spin_lock_irq(&crtc->dev->event_lock); 43 if (crtc->state->event && !crtc->state->active) { 44 drm_crtc_send_vblank_event(crtc, crtc->state->event); 45 crtc->state->event = NULL; 46 } 47 spin_unlock_irq(&crtc->dev->event_lock); 48 } 49 50 static int exynos_crtc_atomic_check(struct drm_crtc *crtc, 51 struct drm_atomic_state *state) 52 { 53 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 54 crtc); 55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 56 57 if (!crtc_state->enable) 58 return 0; 59 60 if (exynos_crtc->ops->atomic_check) 61 return exynos_crtc->ops->atomic_check(exynos_crtc, crtc_state); 62 63 return 0; 64 } 65 66 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 67 struct drm_atomic_state *state) 68 { 69 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 70 71 if (exynos_crtc->ops->atomic_begin) 72 exynos_crtc->ops->atomic_begin(exynos_crtc); 73 } 74 75 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc, 76 struct drm_atomic_state *state) 77 { 78 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 79 80 if (exynos_crtc->ops->atomic_flush) 81 exynos_crtc->ops->atomic_flush(exynos_crtc); 82 } 83 84 static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc, 85 const struct drm_display_mode *mode) 86 { 87 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 88 89 if (exynos_crtc->ops->mode_valid) 90 return exynos_crtc->ops->mode_valid(exynos_crtc, mode); 91 92 return MODE_OK; 93 } 94 95 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc, 96 const struct drm_display_mode *mode, 97 struct drm_display_mode *adjusted_mode) 98 { 99 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 100 101 if (exynos_crtc->ops->mode_fixup) 102 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode, 103 adjusted_mode); 104 105 return true; 106 } 107 108 109 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 110 .mode_valid = exynos_crtc_mode_valid, 111 .mode_fixup = exynos_crtc_mode_fixup, 112 .atomic_check = exynos_crtc_atomic_check, 113 .atomic_begin = exynos_crtc_atomic_begin, 114 .atomic_flush = exynos_crtc_atomic_flush, 115 .atomic_enable = exynos_drm_crtc_atomic_enable, 116 .atomic_disable = exynos_drm_crtc_atomic_disable, 117 }; 118 119 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc) 120 { 121 struct drm_crtc *crtc = &exynos_crtc->base; 122 struct drm_pending_vblank_event *event = crtc->state->event; 123 unsigned long flags; 124 125 if (!event) 126 return; 127 crtc->state->event = NULL; 128 129 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 130 131 spin_lock_irqsave(&crtc->dev->event_lock, flags); 132 drm_crtc_arm_vblank_event(crtc, event); 133 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 134 } 135 136 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 137 { 138 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 139 140 drm_crtc_cleanup(crtc); 141 kfree(exynos_crtc); 142 } 143 144 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc) 145 { 146 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 147 148 if (exynos_crtc->ops->enable_vblank) 149 return exynos_crtc->ops->enable_vblank(exynos_crtc); 150 151 return 0; 152 } 153 154 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc) 155 { 156 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 157 158 if (exynos_crtc->ops->disable_vblank) 159 exynos_crtc->ops->disable_vblank(exynos_crtc); 160 } 161 162 static const struct drm_crtc_funcs exynos_crtc_funcs = { 163 .set_config = drm_atomic_helper_set_config, 164 .page_flip = drm_atomic_helper_page_flip, 165 .destroy = exynos_drm_crtc_destroy, 166 .reset = drm_atomic_helper_crtc_reset, 167 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 168 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 169 .enable_vblank = exynos_drm_crtc_enable_vblank, 170 .disable_vblank = exynos_drm_crtc_disable_vblank, 171 }; 172 173 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 174 struct drm_plane *plane, 175 enum exynos_drm_output_type type, 176 const struct exynos_drm_crtc_ops *ops, 177 void *ctx) 178 { 179 struct exynos_drm_crtc *exynos_crtc; 180 struct drm_crtc *crtc; 181 int ret; 182 183 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 184 if (!exynos_crtc) 185 return ERR_PTR(-ENOMEM); 186 187 exynos_crtc->type = type; 188 exynos_crtc->ops = ops; 189 exynos_crtc->ctx = ctx; 190 191 crtc = &exynos_crtc->base; 192 193 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 194 &exynos_crtc_funcs, NULL); 195 if (ret < 0) 196 goto err_crtc; 197 198 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 199 200 return exynos_crtc; 201 202 err_crtc: 203 plane->funcs->destroy(plane); 204 kfree(exynos_crtc); 205 return ERR_PTR(ret); 206 } 207 208 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev, 209 enum exynos_drm_output_type out_type) 210 { 211 struct drm_crtc *crtc; 212 213 drm_for_each_crtc(crtc, drm_dev) 214 if (to_exynos_crtc(crtc)->type == out_type) 215 return to_exynos_crtc(crtc); 216 217 return ERR_PTR(-ENODEV); 218 } 219 220 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder, 221 enum exynos_drm_output_type out_type) 222 { 223 struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev, 224 out_type); 225 226 if (IS_ERR(crtc)) 227 return PTR_ERR(crtc); 228 229 encoder->possible_crtcs = drm_crtc_mask(&crtc->base); 230 231 return 0; 232 } 233 234 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 235 { 236 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 237 238 if (exynos_crtc->ops->te_handler) 239 exynos_crtc->ops->te_handler(exynos_crtc); 240 } 241