vsp1_wpf.c revision 8a1edc55c1ec1ff3624c25b4ac6c1ce776d872b8 
1/*
2 * vsp1_wpf.c  --  R-Car VSP1 Write Pixel Formatter
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
16#include <media/v4l2-subdev.h>
17
18#include "vsp1.h"
19#include "vsp1_rwpf.h"
20#include "vsp1_video.h"
21
22#define WPF_MAX_WIDTH				2048
23#define WPF_MAX_HEIGHT				2048
24
25/* -----------------------------------------------------------------------------
26 * Device Access
27 */
28
29static inline u32 vsp1_wpf_read(struct vsp1_rwpf *wpf, u32 reg)
30{
31	return vsp1_read(wpf->entity.vsp1,
32			 reg + wpf->entity.index * VI6_WPF_OFFSET);
33}
34
35static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data)
36{
37	vsp1_write(wpf->entity.vsp1,
38		   reg + wpf->entity.index * VI6_WPF_OFFSET, data);
39}
40
41/* -----------------------------------------------------------------------------
42 * V4L2 Subdevice Core Operations
43 */
44
45static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
46{
47	struct vsp1_rwpf *wpf = to_rwpf(subdev);
48	struct vsp1_pipeline *pipe =
49		to_vsp1_pipeline(&wpf->entity.subdev.entity);
50	struct vsp1_device *vsp1 = wpf->entity.vsp1;
51	const struct v4l2_rect *crop = &wpf->crop;
52	unsigned int i;
53	u32 srcrpf = 0;
54	u32 outfmt = 0;
55
56	if (!enable) {
57		vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
58		return 0;
59	}
60
61	/* Sources */
62	for (i = 0; i < pipe->num_inputs; ++i) {
63		struct vsp1_rwpf *input = pipe->inputs[i];
64
65		srcrpf |= VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index);
66	}
67
68	vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
69
70	/* Destination stride. */
71	if (!pipe->lif) {
72		struct v4l2_pix_format_mplane *format = &wpf->video.format;
73
74		vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
75			       format->plane_fmt[0].bytesperline);
76		if (format->num_planes > 1)
77			vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
78				       format->plane_fmt[1].bytesperline);
79	}
80
81	vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
82		       (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
83		       (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
84	vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
85		       (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
86		       (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
87
88	/* Format */
89	if (!pipe->lif) {
90		const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
91
92		outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
93
94		if (fmtinfo->swap_yc)
95			outfmt |= VI6_WPF_OUTFMT_SPYCS;
96		if (fmtinfo->swap_uv)
97			outfmt |= VI6_WPF_OUTFMT_SPUVS;
98
99		vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
100	}
101
102	if (wpf->entity.formats[RWPF_PAD_SINK].code !=
103	    wpf->entity.formats[RWPF_PAD_SOURCE].code)
104		outfmt |= VI6_WPF_OUTFMT_CSC;
105
106	vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
107
108	vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
109		   VI6_DPR_WPF_FPORCH_FP_WPFN);
110
111	vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
112
113	/* Enable interrupts */
114	vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
115	vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
116		   VI6_WFP_IRQ_ENB_FREE);
117
118	return 0;
119}
120
121/* -----------------------------------------------------------------------------
122 * V4L2 Subdevice Operations
123 */
124
125static struct v4l2_subdev_video_ops wpf_video_ops = {
126	.s_stream = wpf_s_stream,
127};
128
129static struct v4l2_subdev_pad_ops wpf_pad_ops = {
130	.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
131	.enum_frame_size = vsp1_rwpf_enum_frame_size,
132	.get_fmt = vsp1_rwpf_get_format,
133	.set_fmt = vsp1_rwpf_set_format,
134	.get_selection = vsp1_rwpf_get_selection,
135	.set_selection = vsp1_rwpf_set_selection,
136};
137
138static struct v4l2_subdev_ops wpf_ops = {
139	.video	= &wpf_video_ops,
140	.pad    = &wpf_pad_ops,
141};
142
143/* -----------------------------------------------------------------------------
144 * Video Device Operations
145 */
146
147static void wpf_vdev_queue(struct vsp1_video *video,
148			   struct vsp1_video_buffer *buf)
149{
150	struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
151
152	vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
153	if (buf->buf.num_planes > 1)
154		vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
155	if (buf->buf.num_planes > 2)
156		vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
157}
158
159static const struct vsp1_video_operations wpf_vdev_ops = {
160	.queue = wpf_vdev_queue,
161};
162
163/* -----------------------------------------------------------------------------
164 * Initialization and Cleanup
165 */
166
167struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
168{
169	struct v4l2_subdev *subdev;
170	struct vsp1_video *video;
171	struct vsp1_rwpf *wpf;
172	unsigned int flags;
173	int ret;
174
175	wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
176	if (wpf == NULL)
177		return ERR_PTR(-ENOMEM);
178
179	wpf->max_width = WPF_MAX_WIDTH;
180	wpf->max_height = WPF_MAX_HEIGHT;
181
182	wpf->entity.type = VSP1_ENTITY_WPF;
183	wpf->entity.index = index;
184	wpf->entity.id = VI6_DPR_NODE_WPF(index);
185
186	ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
187	if (ret < 0)
188		return ERR_PTR(ret);
189
190	/* Initialize the V4L2 subdev. */
191	subdev = &wpf->entity.subdev;
192	v4l2_subdev_init(subdev, &wpf_ops);
193
194	subdev->entity.ops = &vsp1_media_ops;
195	subdev->internal_ops = &vsp1_subdev_internal_ops;
196	snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
197		 dev_name(vsp1->dev), index);
198	v4l2_set_subdevdata(subdev, wpf);
199	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
200
201	vsp1_entity_init_formats(subdev, NULL);
202
203	/* Initialize the video device. */
204	video = &wpf->video;
205
206	video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
207	video->vsp1 = vsp1;
208	video->ops = &wpf_vdev_ops;
209
210	ret = vsp1_video_init(video, &wpf->entity);
211	if (ret < 0)
212		goto error_video;
213
214	/* Connect the video device to the WPF. All connections are immutable
215	 * except for the WPF0 source link if a LIF is present.
216	 */
217	flags = MEDIA_LNK_FL_ENABLED;
218	if (!(vsp1->pdata->features & VSP1_HAS_LIF) || index != 0)
219		flags |= MEDIA_LNK_FL_IMMUTABLE;
220
221	ret = media_entity_create_link(&wpf->entity.subdev.entity,
222				       RWPF_PAD_SOURCE,
223				       &wpf->video.video.entity, 0, flags);
224	if (ret < 0)
225		goto error_link;
226
227	wpf->entity.sink = &wpf->video.video.entity;
228
229	return wpf;
230
231error_link:
232	vsp1_video_cleanup(video);
233error_video:
234	media_entity_cleanup(&wpf->entity.subdev.entity);
235	return ERR_PTR(ret);
236}
237