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