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_crtc_state *state) 53 { 54 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 55 56 if (!state->enable) 57 return 0; 58 59 if (exynos_crtc->ops->atomic_check) 60 return exynos_crtc->ops->atomic_check(exynos_crtc, state); 61 62 return 0; 63 } 64 65 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 66 struct drm_crtc_state *old_crtc_state) 67 { 68 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 69 70 if (exynos_crtc->ops->atomic_begin) 71 exynos_crtc->ops->atomic_begin(exynos_crtc); 72 } 73 74 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc, 75 struct drm_crtc_state *old_crtc_state) 76 { 77 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 78 79 if (exynos_crtc->ops->atomic_flush) 80 exynos_crtc->ops->atomic_flush(exynos_crtc); 81 } 82 83 static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc, 84 const struct drm_display_mode *mode) 85 { 86 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 87 88 if (exynos_crtc->ops->mode_valid) 89 return exynos_crtc->ops->mode_valid(exynos_crtc, mode); 90 91 return MODE_OK; 92 } 93 94 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc, 95 const struct drm_display_mode *mode, 96 struct drm_display_mode *adjusted_mode) 97 { 98 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 99 100 if (exynos_crtc->ops->mode_fixup) 101 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode, 102 adjusted_mode); 103 104 return true; 105 } 106 107 108 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 109 .mode_valid = exynos_crtc_mode_valid, 110 .mode_fixup = exynos_crtc_mode_fixup, 111 .atomic_check = exynos_crtc_atomic_check, 112 .atomic_begin = exynos_crtc_atomic_begin, 113 .atomic_flush = exynos_crtc_atomic_flush, 114 .atomic_enable = exynos_drm_crtc_atomic_enable, 115 .atomic_disable = exynos_drm_crtc_atomic_disable, 116 }; 117 118 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc) 119 { 120 struct drm_crtc *crtc = &exynos_crtc->base; 121 struct drm_pending_vblank_event *event = crtc->state->event; 122 unsigned long flags; 123 124 if (!event) 125 return; 126 crtc->state->event = NULL; 127 128 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 129 130 spin_lock_irqsave(&crtc->dev->event_lock, flags); 131 drm_crtc_arm_vblank_event(crtc, event); 132 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 133 } 134 135 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 136 { 137 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 138 139 drm_crtc_cleanup(crtc); 140 kfree(exynos_crtc); 141 } 142 143 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc) 144 { 145 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 146 147 if (exynos_crtc->ops->enable_vblank) 148 return exynos_crtc->ops->enable_vblank(exynos_crtc); 149 150 return 0; 151 } 152 153 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc) 154 { 155 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 156 157 if (exynos_crtc->ops->disable_vblank) 158 exynos_crtc->ops->disable_vblank(exynos_crtc); 159 } 160 161 static const struct drm_crtc_funcs exynos_crtc_funcs = { 162 .set_config = drm_atomic_helper_set_config, 163 .page_flip = drm_atomic_helper_page_flip, 164 .destroy = exynos_drm_crtc_destroy, 165 .reset = drm_atomic_helper_crtc_reset, 166 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 167 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 168 .enable_vblank = exynos_drm_crtc_enable_vblank, 169 .disable_vblank = exynos_drm_crtc_disable_vblank, 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(-ENODEV); 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