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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