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
 21static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
 22					  struct drm_crtc_state *old_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_crtc_state *old_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
 51static 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
 65static 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
 74static 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
 83static 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
 94static 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
108static 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
118void 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
135static 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
143static 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
153static 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
161static 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
172struct 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
201err_crtc:
202	plane->funcs->destroy(plane);
203	kfree(exynos_crtc);
204	return ERR_PTR(ret);
205}
206
207struct 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
219int 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
233void 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}