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 int exynos_crtc_atomic_check(struct drm_crtc *crtc, 53 struct drm_crtc_state *state) 54 { 55 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 56 57 if (!state->enable) 58 return 0; 59 60 if (exynos_crtc->ops->atomic_check) 61 return exynos_crtc->ops->atomic_check(exynos_crtc, state); 62 63 return 0; 64 } 65 66 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc, 67 struct drm_crtc_state *old_crtc_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_crtc_state *old_crtc_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 const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 85 .enable = exynos_drm_crtc_enable, 86 .disable = exynos_drm_crtc_disable, 87 .atomic_check = exynos_crtc_atomic_check, 88 .atomic_begin = exynos_crtc_atomic_begin, 89 .atomic_flush = exynos_crtc_atomic_flush, 90 }; 91 92 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc) 93 { 94 struct drm_crtc *crtc = &exynos_crtc->base; 95 struct drm_pending_vblank_event *event = crtc->state->event; 96 unsigned long flags; 97 98 if (!event) 99 return; 100 crtc->state->event = NULL; 101 102 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 103 104 spin_lock_irqsave(&crtc->dev->event_lock, flags); 105 drm_crtc_arm_vblank_event(crtc, event); 106 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 107 } 108 109 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 110 { 111 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 112 113 drm_crtc_cleanup(crtc); 114 kfree(exynos_crtc); 115 } 116 117 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc) 118 { 119 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 120 121 if (exynos_crtc->ops->enable_vblank) 122 return exynos_crtc->ops->enable_vblank(exynos_crtc); 123 124 return 0; 125 } 126 127 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc) 128 { 129 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 130 131 if (exynos_crtc->ops->disable_vblank) 132 exynos_crtc->ops->disable_vblank(exynos_crtc); 133 } 134 135 static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc) 136 { 137 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 138 139 if (exynos_crtc->ops->get_vblank_counter) 140 return exynos_crtc->ops->get_vblank_counter(exynos_crtc); 141 142 return 0; 143 } 144 145 static const struct drm_crtc_funcs exynos_crtc_funcs = { 146 .set_config = drm_atomic_helper_set_config, 147 .page_flip = drm_atomic_helper_page_flip, 148 .destroy = exynos_drm_crtc_destroy, 149 .reset = drm_atomic_helper_crtc_reset, 150 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 151 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 152 .enable_vblank = exynos_drm_crtc_enable_vblank, 153 .disable_vblank = exynos_drm_crtc_disable_vblank, 154 .get_vblank_counter = exynos_drm_crtc_get_vblank_counter, 155 }; 156 157 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 158 struct drm_plane *plane, 159 enum exynos_drm_output_type type, 160 const struct exynos_drm_crtc_ops *ops, 161 void *ctx) 162 { 163 struct exynos_drm_crtc *exynos_crtc; 164 struct drm_crtc *crtc; 165 int ret; 166 167 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 168 if (!exynos_crtc) 169 return ERR_PTR(-ENOMEM); 170 171 exynos_crtc->type = type; 172 exynos_crtc->ops = ops; 173 exynos_crtc->ctx = ctx; 174 175 crtc = &exynos_crtc->base; 176 177 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 178 &exynos_crtc_funcs, NULL); 179 if (ret < 0) 180 goto err_crtc; 181 182 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 183 184 return exynos_crtc; 185 186 err_crtc: 187 plane->funcs->destroy(plane); 188 kfree(exynos_crtc); 189 return ERR_PTR(ret); 190 } 191 192 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 193 enum exynos_drm_output_type out_type) 194 { 195 struct drm_crtc *crtc; 196 197 drm_for_each_crtc(crtc, drm_dev) 198 if (to_exynos_crtc(crtc)->type == out_type) 199 return drm_crtc_index(crtc); 200 201 return -EPERM; 202 } 203 204 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 205 { 206 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 207 208 if (exynos_crtc->ops->te_handler) 209 exynos_crtc->ops->te_handler(exynos_crtc); 210 } 211