1/*
2 * vsp1_entity.c  --  R-Car VSP1 Base Entity
3 *
4 * Copyright (C) 2013-2014 Renesas Electronics Corporation
5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/device.h>
15#include <linux/gfp.h>
16
17#include <media/media-entity.h>
18#include <media/v4l2-ctrls.h>
19#include <media/v4l2-subdev.h>
20
21#include "vsp1.h"
22#include "vsp1_entity.h"
23#include "vsp1_video.h"
24
25bool vsp1_entity_is_streaming(struct vsp1_entity *entity)
26{
27	bool streaming;
28
29	mutex_lock(&entity->lock);
30	streaming = entity->streaming;
31	mutex_unlock(&entity->lock);
32
33	return streaming;
34}
35
36int vsp1_entity_set_streaming(struct vsp1_entity *entity, bool streaming)
37{
38	int ret;
39
40	mutex_lock(&entity->lock);
41	entity->streaming = streaming;
42	mutex_unlock(&entity->lock);
43
44	if (!streaming)
45		return 0;
46
47	if (!entity->subdev.ctrl_handler)
48		return 0;
49
50	ret = v4l2_ctrl_handler_setup(entity->subdev.ctrl_handler);
51	if (ret < 0) {
52		mutex_lock(&entity->lock);
53		entity->streaming = false;
54		mutex_unlock(&entity->lock);
55	}
56
57	return ret;
58}
59
60/* -----------------------------------------------------------------------------
61 * V4L2 Subdevice Operations
62 */
63
64struct v4l2_mbus_framefmt *
65vsp1_entity_get_pad_format(struct vsp1_entity *entity,
66			   struct v4l2_subdev_pad_config *cfg,
67			   unsigned int pad, u32 which)
68{
69	switch (which) {
70	case V4L2_SUBDEV_FORMAT_TRY:
71		return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
72	case V4L2_SUBDEV_FORMAT_ACTIVE:
73		return &entity->formats[pad];
74	default:
75		return NULL;
76	}
77}
78
79/*
80 * vsp1_entity_init_formats - Initialize formats on all pads
81 * @subdev: V4L2 subdevice
82 * @cfg: V4L2 subdev pad configuration
83 *
84 * Initialize all pad formats with default values. If cfg is not NULL, try
85 * formats are initialized on the file handle. Otherwise active formats are
86 * initialized on the device.
87 */
88void vsp1_entity_init_formats(struct v4l2_subdev *subdev,
89			    struct v4l2_subdev_pad_config *cfg)
90{
91	struct v4l2_subdev_format format;
92	unsigned int pad;
93
94	for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
95		memset(&format, 0, sizeof(format));
96
97		format.pad = pad;
98		format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
99			     : V4L2_SUBDEV_FORMAT_ACTIVE;
100
101		v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
102	}
103}
104
105static int vsp1_entity_open(struct v4l2_subdev *subdev,
106			    struct v4l2_subdev_fh *fh)
107{
108	vsp1_entity_init_formats(subdev, fh->pad);
109
110	return 0;
111}
112
113const struct v4l2_subdev_internal_ops vsp1_subdev_internal_ops = {
114	.open = vsp1_entity_open,
115};
116
117/* -----------------------------------------------------------------------------
118 * Media Operations
119 */
120
121static int vsp1_entity_link_setup(struct media_entity *entity,
122				  const struct media_pad *local,
123				  const struct media_pad *remote, u32 flags)
124{
125	struct vsp1_entity *source;
126
127	if (!(local->flags & MEDIA_PAD_FL_SOURCE))
128		return 0;
129
130	source = container_of(local->entity, struct vsp1_entity, subdev.entity);
131
132	if (!source->route)
133		return 0;
134
135	if (flags & MEDIA_LNK_FL_ENABLED) {
136		if (source->sink)
137			return -EBUSY;
138		source->sink = remote->entity;
139		source->sink_pad = remote->index;
140	} else {
141		source->sink = NULL;
142		source->sink_pad = 0;
143	}
144
145	return 0;
146}
147
148const struct media_entity_operations vsp1_media_ops = {
149	.link_setup = vsp1_entity_link_setup,
150	.link_validate = v4l2_subdev_link_validate,
151};
152
153/* -----------------------------------------------------------------------------
154 * Initialization
155 */
156
157static const struct vsp1_route vsp1_routes[] = {
158	{ VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
159	  { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
160	    VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3), } },
161	{ VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
162	{ VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
163	{ VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
164	{ VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
165	{ VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
166	{ VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
167	{ VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
168	{ VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
169	{ VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
170	{ VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
171	{ VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
172	{ VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
173	{ VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
174	{ VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
175	{ VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
176	{ VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
177	{ VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
178};
179
180int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
181		     unsigned int num_pads)
182{
183	unsigned int i;
184
185	for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
186		if (vsp1_routes[i].type == entity->type &&
187		    vsp1_routes[i].index == entity->index) {
188			entity->route = &vsp1_routes[i];
189			break;
190		}
191	}
192
193	if (i == ARRAY_SIZE(vsp1_routes))
194		return -EINVAL;
195
196	mutex_init(&entity->lock);
197
198	entity->vsp1 = vsp1;
199	entity->source_pad = num_pads - 1;
200
201	/* Allocate formats and pads. */
202	entity->formats = devm_kzalloc(vsp1->dev,
203				       num_pads * sizeof(*entity->formats),
204				       GFP_KERNEL);
205	if (entity->formats == NULL)
206		return -ENOMEM;
207
208	entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
209				    GFP_KERNEL);
210	if (entity->pads == NULL)
211		return -ENOMEM;
212
213	/* Initialize pads. */
214	for (i = 0; i < num_pads - 1; ++i)
215		entity->pads[i].flags = MEDIA_PAD_FL_SINK;
216
217	entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
218
219	/* Initialize the media entity. */
220	return media_entity_init(&entity->subdev.entity, num_pads,
221				 entity->pads, 0);
222}
223
224void vsp1_entity_destroy(struct vsp1_entity *entity)
225{
226	if (entity->video)
227		vsp1_video_cleanup(entity->video);
228	if (entity->subdev.ctrl_handler)
229		v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
230	media_entity_cleanup(&entity->subdev.entity);
231
232	mutex_destroy(&entity->lock);
233}
234