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1// SPDX-License-Identifier: GPL-2.0-or-later2/* exynos_drm_crtc.c3 *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 21static 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 32static 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 50static 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 66static 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 75static 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 84static 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 95static 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 109static 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 119void 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 136static 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 144static 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 154static 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 162static 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 173struct 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 202err_crtc:203 plane->funcs->destroy(plane);204 kfree(exynos_crtc);205 return ERR_PTR(ret);206}207 208struct 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 220int 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 234void 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