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
vsp1_rpf_read(struct vsp1_rwpf * rpf,u32 reg)29 static 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
vsp1_rpf_write(struct vsp1_rwpf * rpf,u32 reg,u32 data)35 static 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
rpf_s_ctrl(struct v4l2_ctrl * ctrl)45 static 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
67 static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
68 .s_ctrl = rpf_s_ctrl,
69 };
70
71 /* -----------------------------------------------------------------------------
72 * V4L2 Subdevice Core Operations
73 */
74
rpf_s_stream(struct v4l2_subdev * subdev,int enable)75 static 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
167 static struct v4l2_subdev_video_ops rpf_video_ops = {
168 .s_stream = rpf_s_stream,
169 };
170
171 static 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
180 static 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
rpf_vdev_queue(struct vsp1_video * video,struct vsp1_video_buffer * buf)189 static 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.vb2_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.vb2_buf.num_planes > 2)
207 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
208 buf->addr[2] + rpf->offsets[1]);
209 }
210
211 static const struct vsp1_video_operations rpf_vdev_ops = {
212 .queue = rpf_vdev_queue,
213 };
214
215 /* -----------------------------------------------------------------------------
216 * Initialization and Cleanup
217 */
218
vsp1_rpf_create(struct vsp1_device * vsp1,unsigned int index)219 struct 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
291 error:
292 vsp1_entity_destroy(&rpf->entity);
293 return ERR_PTR(ret);
294 }
295