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
 24static 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
 34static 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
 44static void
 45exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 46{
 47	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 48
 49	if (exynos_crtc->ops->commit)
 50		exynos_crtc->ops->commit(exynos_crtc);
 51}
 52
 53static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
 54				     struct drm_crtc_state *state)
 55{
 56	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 57
 58	if (!state->enable)
 59		return 0;
 60
 61	if (exynos_crtc->ops->atomic_check)
 62		return exynos_crtc->ops->atomic_check(exynos_crtc, state);
 63
 64	return 0;
 65}
 66
 67static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
 68				     struct drm_crtc_state *old_crtc_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_crtc_state *old_crtc_state)
 78{
 79	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 80	struct drm_pending_vblank_event *event;
 81	unsigned long flags;
 82
 83	if (exynos_crtc->ops->atomic_flush)
 84		exynos_crtc->ops->atomic_flush(exynos_crtc);
 85
 86	event = crtc->state->event;
 87	if (event) {
 88		crtc->state->event = NULL;
 89
 90		spin_lock_irqsave(&crtc->dev->event_lock, flags);
 91		if (drm_crtc_vblank_get(crtc) == 0)
 92			drm_crtc_arm_vblank_event(crtc, event);
 93		else
 94			drm_crtc_send_vblank_event(crtc, event);
 95		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 96	}
 97
 98}
 99
100static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
101	.enable		= exynos_drm_crtc_enable,
102	.disable	= exynos_drm_crtc_disable,
103	.mode_set_nofb	= exynos_drm_crtc_mode_set_nofb,
104	.atomic_check	= exynos_crtc_atomic_check,
105	.atomic_begin	= exynos_crtc_atomic_begin,
106	.atomic_flush	= exynos_crtc_atomic_flush,
107};
108
109static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
110{
111	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
112	struct exynos_drm_private *private = crtc->dev->dev_private;
113
114	private->crtc[exynos_crtc->pipe] = NULL;
115
116	drm_crtc_cleanup(crtc);
117	kfree(exynos_crtc);
118}
119
120static const struct drm_crtc_funcs exynos_crtc_funcs = {
121	.set_config	= drm_atomic_helper_set_config,
122	.page_flip	= drm_atomic_helper_page_flip,
123	.destroy	= exynos_drm_crtc_destroy,
124	.reset = drm_atomic_helper_crtc_reset,
125	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
126	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
127};
128
129struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
130					struct drm_plane *plane,
131					int pipe,
132					enum exynos_drm_output_type type,
133					const struct exynos_drm_crtc_ops *ops,
134					void *ctx)
135{
136	struct exynos_drm_crtc *exynos_crtc;
137	struct exynos_drm_private *private = drm_dev->dev_private;
138	struct drm_crtc *crtc;
139	int ret;
140
141	exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
142	if (!exynos_crtc)
143		return ERR_PTR(-ENOMEM);
144
145	exynos_crtc->pipe = pipe;
146	exynos_crtc->type = type;
147	exynos_crtc->ops = ops;
148	exynos_crtc->ctx = ctx;
149
150	crtc = &exynos_crtc->base;
151
152	private->crtc[pipe] = crtc;
153
154	ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
155					&exynos_crtc_funcs, NULL);
156	if (ret < 0)
157		goto err_crtc;
158
159	drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
160
161	return exynos_crtc;
162
163err_crtc:
164	plane->funcs->destroy(plane);
165	kfree(exynos_crtc);
166	return ERR_PTR(ret);
167}
168
169int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
170{
171	struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev,
172									pipe);
173
174	if (exynos_crtc->ops->enable_vblank)
175		return exynos_crtc->ops->enable_vblank(exynos_crtc);
176
177	return 0;
178}
179
180void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe)
181{
182	struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev,
183									pipe);
184
185	if (exynos_crtc->ops->disable_vblank)
186		exynos_crtc->ops->disable_vblank(exynos_crtc);
187}
188
189int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
190				       enum exynos_drm_output_type out_type)
191{
192	struct drm_crtc *crtc;
193
194	list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
195		struct exynos_drm_crtc *exynos_crtc;
196
197		exynos_crtc = to_exynos_crtc(crtc);
198		if (exynos_crtc->type == out_type)
199			return exynos_crtc->pipe;
200	}
201
202	return -EPERM;
203}
204
205void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
206{
207	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
208
209	if (exynos_crtc->ops->te_handler)
210		exynos_crtc->ops->te_handler(exynos_crtc);
211}
212
213void exynos_drm_crtc_cancel_page_flip(struct drm_crtc *crtc,
214					struct drm_file *file)
215{
216	struct drm_pending_vblank_event *e;
217	unsigned long flags;
218
219	spin_lock_irqsave(&crtc->dev->event_lock, flags);
220
221	e = crtc->state->event;
222	if (e && e->base.file_priv == file)
223		crtc->state->event = NULL;
224	else
225		e = NULL;
226
227	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
228
229	if (e)
230		drm_event_cancel_free(crtc->dev, &e->base);
231}