summaryrefslogtreecommitdiff
path: root/drivers/media/platform/vsp1/vsp1_rpf.c
blob: bce2be5466b9133df3afdf1495fe94f7438a532b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
/*
 * vsp1_rpf.c  --  R-Car VSP1 Read Pixel Formatter
 *
 * Copyright (C) 2013 Renesas Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/device.h>

#include <media/v4l2-subdev.h>

#include "vsp1.h"
#include "vsp1_rwpf.h"
#include "vsp1_video.h"

#define RPF_MAX_WIDTH				8190
#define RPF_MAX_HEIGHT				8190

/* -----------------------------------------------------------------------------
 * Device Access
 */

static inline u32 vsp1_rpf_read(struct vsp1_rwpf *rpf, u32 reg)
{
	return vsp1_read(rpf->entity.vsp1,
			 reg + rpf->entity.index * VI6_RPF_OFFSET);
}

static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data)
{
	vsp1_write(rpf->entity.vsp1,
		   reg + rpf->entity.index * VI6_RPF_OFFSET, data);
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Core Operations
 */

static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
{
	struct vsp1_rwpf *rpf = to_rwpf(subdev);
	const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo;
	const struct v4l2_pix_format_mplane *format = &rpf->video.format;
	const struct v4l2_rect *crop = &rpf->crop;
	u32 pstride;
	u32 infmt;

	if (!enable)
		return 0;

	/* Source size, stride and crop offsets.
	 *
	 * The crop offsets correspond to the location of the crop rectangle top
	 * left corner in the plane buffer. Only two offsets are needed, as
	 * planes 2 and 3 always have identical strides.
	 */
	vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
		       (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
		       (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
	vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
		       (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
		       (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));

	rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
			+ crop->left * fmtinfo->bpp[0] / 8;
	pstride = format->plane_fmt[0].bytesperline
		<< VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
	if (format->num_planes > 1) {
		rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
				+ crop->left * fmtinfo->bpp[1] / 8;
		pstride |= format->plane_fmt[1].bytesperline
			<< VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
	}

	vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);

	/* Format */
	infmt = VI6_RPF_INFMT_CIPM
	      | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);

	if (fmtinfo->swap_yc)
		infmt |= VI6_RPF_INFMT_SPYCS;
	if (fmtinfo->swap_uv)
		infmt |= VI6_RPF_INFMT_SPUVS;

	if (rpf->entity.formats[RWPF_PAD_SINK].code !=
	    rpf->entity.formats[RWPF_PAD_SOURCE].code)
		infmt |= VI6_RPF_INFMT_CSC;

	vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
	vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);

	/* Output location. Composing isn't supported yet. */
	vsp1_rpf_write(rpf, VI6_RPF_LOC, 0);

	/* Disable alpha, mask and color key. Set the alpha channel to a fixed
	 * value of 255.
	 */
	vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_ASEL_FIXED);
	vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
		       255 << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
	vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
	vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);

	return 0;
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Operations
 */

static struct v4l2_subdev_video_ops rpf_video_ops = {
	.s_stream = rpf_s_stream,
};

static struct v4l2_subdev_pad_ops rpf_pad_ops = {
	.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
	.enum_frame_size = vsp1_rwpf_enum_frame_size,
	.get_fmt = vsp1_rwpf_get_format,
	.set_fmt = vsp1_rwpf_set_format,
	.get_selection = vsp1_rwpf_get_selection,
	.set_selection = vsp1_rwpf_set_selection,
};

static struct v4l2_subdev_ops rpf_ops = {
	.video	= &rpf_video_ops,
	.pad    = &rpf_pad_ops,
};

/* -----------------------------------------------------------------------------
 * Video Device Operations
 */

static void rpf_vdev_queue(struct vsp1_video *video,
			   struct vsp1_video_buffer *buf)
{
	struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);

	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
		       buf->addr[0] + rpf->offsets[0]);
	if (buf->buf.num_planes > 1)
		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
			       buf->addr[1] + rpf->offsets[1]);
	if (buf->buf.num_planes > 2)
		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
			       buf->addr[2] + rpf->offsets[1]);
}

static const struct vsp1_video_operations rpf_vdev_ops = {
	.queue = rpf_vdev_queue,
};

/* -----------------------------------------------------------------------------
 * Initialization and Cleanup
 */

struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
{
	struct v4l2_subdev *subdev;
	struct vsp1_video *video;
	struct vsp1_rwpf *rpf;
	int ret;

	rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
	if (rpf == NULL)
		return ERR_PTR(-ENOMEM);

	rpf->max_width = RPF_MAX_WIDTH;
	rpf->max_height = RPF_MAX_HEIGHT;

	rpf->entity.type = VSP1_ENTITY_RPF;
	rpf->entity.index = index;
	rpf->entity.id = VI6_DPR_NODE_RPF(index);

	ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
	if (ret < 0)
		return ERR_PTR(ret);

	/* Initialize the V4L2 subdev. */
	subdev = &rpf->entity.subdev;
	v4l2_subdev_init(subdev, &rpf_ops);

	subdev->entity.ops = &vsp1_media_ops;
	subdev->internal_ops = &vsp1_subdev_internal_ops;
	snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
		 dev_name(vsp1->dev), index);
	v4l2_set_subdevdata(subdev, rpf);
	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

	vsp1_entity_init_formats(subdev, NULL);

	/* Initialize the video device. */
	video = &rpf->video;

	video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
	video->vsp1 = vsp1;
	video->ops = &rpf_vdev_ops;

	ret = vsp1_video_init(video, &rpf->entity);
	if (ret < 0)
		goto error_video;

	/* Connect the video device to the RPF. */
	ret = media_entity_create_link(&rpf->video.video.entity, 0,
				       &rpf->entity.subdev.entity,
				       RWPF_PAD_SINK,
				       MEDIA_LNK_FL_ENABLED |
				       MEDIA_LNK_FL_IMMUTABLE);
	if (ret < 0)
		goto error_link;

	return rpf;

error_link:
	vsp1_video_cleanup(video);
error_video:
	media_entity_cleanup(&rpf->entity.subdev.entity);
	return ERR_PTR(ret);
}