1/*
2 * vsp1_rpf.c  --  R-Car VSP1 Read 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 RPF_MAX_WIDTH				8190
23#define RPF_MAX_HEIGHT				8190
24
25/* -----------------------------------------------------------------------------
26 * Device Access
27 */
28
29static inline u32 vsp1_rpf_read(struct vsp1_rwpf *rpf, u32 reg)
30{
31	return vsp1_read(rpf->entity.vsp1,
32			 reg + rpf->entity.index * VI6_RPF_OFFSET);
33}
34
35static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data)
36{
37	vsp1_write(rpf->entity.vsp1,
38		   reg + rpf->entity.index * VI6_RPF_OFFSET, data);
39}
40
41/* -----------------------------------------------------------------------------
42 * Controls
43 */
44
45static int rpf_s_ctrl(struct v4l2_ctrl *ctrl)
46{
47	struct vsp1_rwpf *rpf =
48		container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
49	struct vsp1_pipeline *pipe;
50
51	if (!vsp1_entity_is_streaming(&rpf->entity))
52		return 0;
53
54	switch (ctrl->id) {
55	case V4L2_CID_ALPHA_COMPONENT:
56		vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
57			       ctrl->val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
58
59		pipe = to_vsp1_pipeline(&rpf->entity.subdev.entity);
60		vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, ctrl->val);
61		break;
62	}
63
64	return 0;
65}
66
67static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
68	.s_ctrl = rpf_s_ctrl,
69};
70
71/* -----------------------------------------------------------------------------
72 * V4L2 Subdevice Core Operations
73 */
74
75static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
76{
77	struct vsp1_rwpf *rpf = to_rwpf(subdev);
78	const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo;
79	const struct v4l2_pix_format_mplane *format = &rpf->video.format;
80	const struct v4l2_rect *crop = &rpf->crop;
81	u32 pstride;
82	u32 infmt;
83	int ret;
84
85	ret = vsp1_entity_set_streaming(&rpf->entity, enable);
86	if (ret < 0)
87		return ret;
88
89	if (!enable)
90		return 0;
91
92	/* Source size, stride and crop offsets.
93	 *
94	 * The crop offsets correspond to the location of the crop rectangle top
95	 * left corner in the plane buffer. Only two offsets are needed, as
96	 * planes 2 and 3 always have identical strides.
97	 */
98	vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
99		       (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
100		       (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
101	vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
102		       (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
103		       (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
104
105	rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
106			+ crop->left * fmtinfo->bpp[0] / 8;
107	pstride = format->plane_fmt[0].bytesperline
108		<< VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
109
110	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
111		       rpf->buf_addr[0] + rpf->offsets[0]);
112
113	if (format->num_planes > 1) {
114		rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
115				+ crop->left * fmtinfo->bpp[1] / 8;
116		pstride |= format->plane_fmt[1].bytesperline
117			<< VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
118
119		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
120			       rpf->buf_addr[1] + rpf->offsets[1]);
121
122		if (format->num_planes > 2)
123			vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
124				       rpf->buf_addr[2] + rpf->offsets[1]);
125	}
126
127	vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
128
129	/* Format */
130	infmt = VI6_RPF_INFMT_CIPM
131	      | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
132
133	if (fmtinfo->swap_yc)
134		infmt |= VI6_RPF_INFMT_SPYCS;
135	if (fmtinfo->swap_uv)
136		infmt |= VI6_RPF_INFMT_SPUVS;
137
138	if (rpf->entity.formats[RWPF_PAD_SINK].code !=
139	    rpf->entity.formats[RWPF_PAD_SOURCE].code)
140		infmt |= VI6_RPF_INFMT_CSC;
141
142	vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
143	vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
144
145	/* Output location */
146	vsp1_rpf_write(rpf, VI6_RPF_LOC,
147		       (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
148		       (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
149
150	/* Use the alpha channel (extended to 8 bits) when available or an
151	 * alpha value set through the V4L2_CID_ALPHA_COMPONENT control
152	 * otherwise. Disable color keying.
153	 */
154	vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
155		       (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
156				       : VI6_RPF_ALPH_SEL_ASEL_FIXED));
157	vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
158	vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
159
160	return 0;
161}
162
163/* -----------------------------------------------------------------------------
164 * V4L2 Subdevice Operations
165 */
166
167static struct v4l2_subdev_video_ops rpf_video_ops = {
168	.s_stream = rpf_s_stream,
169};
170
171static struct v4l2_subdev_pad_ops rpf_pad_ops = {
172	.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
173	.enum_frame_size = vsp1_rwpf_enum_frame_size,
174	.get_fmt = vsp1_rwpf_get_format,
175	.set_fmt = vsp1_rwpf_set_format,
176	.get_selection = vsp1_rwpf_get_selection,
177	.set_selection = vsp1_rwpf_set_selection,
178};
179
180static struct v4l2_subdev_ops rpf_ops = {
181	.video	= &rpf_video_ops,
182	.pad    = &rpf_pad_ops,
183};
184
185/* -----------------------------------------------------------------------------
186 * Video Device Operations
187 */
188
189static void rpf_vdev_queue(struct vsp1_video *video,
190			   struct vsp1_video_buffer *buf)
191{
192	struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);
193	unsigned int i;
194
195	for (i = 0; i < 3; ++i)
196		rpf->buf_addr[i] = buf->addr[i];
197
198	if (!vsp1_entity_is_streaming(&rpf->entity))
199		return;
200
201	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
202		       buf->addr[0] + rpf->offsets[0]);
203	if (buf->buf.num_planes > 1)
204		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
205			       buf->addr[1] + rpf->offsets[1]);
206	if (buf->buf.num_planes > 2)
207		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
208			       buf->addr[2] + rpf->offsets[1]);
209}
210
211static const struct vsp1_video_operations rpf_vdev_ops = {
212	.queue = rpf_vdev_queue,
213};
214
215/* -----------------------------------------------------------------------------
216 * Initialization and Cleanup
217 */
218
219struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
220{
221	struct v4l2_subdev *subdev;
222	struct vsp1_video *video;
223	struct vsp1_rwpf *rpf;
224	int ret;
225
226	rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
227	if (rpf == NULL)
228		return ERR_PTR(-ENOMEM);
229
230	rpf->max_width = RPF_MAX_WIDTH;
231	rpf->max_height = RPF_MAX_HEIGHT;
232
233	rpf->entity.type = VSP1_ENTITY_RPF;
234	rpf->entity.index = index;
235
236	ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
237	if (ret < 0)
238		return ERR_PTR(ret);
239
240	/* Initialize the V4L2 subdev. */
241	subdev = &rpf->entity.subdev;
242	v4l2_subdev_init(subdev, &rpf_ops);
243
244	subdev->entity.ops = &vsp1_media_ops;
245	subdev->internal_ops = &vsp1_subdev_internal_ops;
246	snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
247		 dev_name(vsp1->dev), index);
248	v4l2_set_subdevdata(subdev, rpf);
249	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
250
251	vsp1_entity_init_formats(subdev, NULL);
252
253	/* Initialize the control handler. */
254	v4l2_ctrl_handler_init(&rpf->ctrls, 1);
255	v4l2_ctrl_new_std(&rpf->ctrls, &rpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
256			  0, 255, 1, 255);
257
258	rpf->entity.subdev.ctrl_handler = &rpf->ctrls;
259
260	if (rpf->ctrls.error) {
261		dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
262			index);
263		ret = rpf->ctrls.error;
264		goto error;
265	}
266
267	/* Initialize the video device. */
268	video = &rpf->video;
269
270	video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
271	video->vsp1 = vsp1;
272	video->ops = &rpf_vdev_ops;
273
274	ret = vsp1_video_init(video, &rpf->entity);
275	if (ret < 0)
276		goto error;
277
278	rpf->entity.video = video;
279
280	/* Connect the video device to the RPF. */
281	ret = media_entity_create_link(&rpf->video.video.entity, 0,
282				       &rpf->entity.subdev.entity,
283				       RWPF_PAD_SINK,
284				       MEDIA_LNK_FL_ENABLED |
285				       MEDIA_LNK_FL_IMMUTABLE);
286	if (ret < 0)
287		goto error;
288
289	return rpf;
290
291error:
292	vsp1_entity_destroy(&rpf->entity);
293	return ERR_PTR(ret);
294}
295