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