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
vsp1_wpf_read(struct vsp1_rwpf * wpf,u32 reg)29 static 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
vsp1_wpf_write(struct vsp1_rwpf * wpf,u32 reg,u32 data)35 static 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 * Controls
43 */
44
wpf_s_ctrl(struct v4l2_ctrl * ctrl)45 static int wpf_s_ctrl(struct v4l2_ctrl *ctrl)
46 {
47 struct vsp1_rwpf *wpf =
48 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
49 u32 value;
50
51 if (!vsp1_entity_is_streaming(&wpf->entity))
52 return 0;
53
54 switch (ctrl->id) {
55 case V4L2_CID_ALPHA_COMPONENT:
56 value = vsp1_wpf_read(wpf, VI6_WPF_OUTFMT);
57 value &= ~VI6_WPF_OUTFMT_PDV_MASK;
58 value |= ctrl->val << VI6_WPF_OUTFMT_PDV_SHIFT;
59 vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, value);
60 break;
61 }
62
63 return 0;
64 }
65
66 static const struct v4l2_ctrl_ops wpf_ctrl_ops = {
67 .s_ctrl = wpf_s_ctrl,
68 };
69
70 /* -----------------------------------------------------------------------------
71 * V4L2 Subdevice Core Operations
72 */
73
wpf_s_stream(struct v4l2_subdev * subdev,int enable)74 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
75 {
76 struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
77 struct vsp1_rwpf *wpf = to_rwpf(subdev);
78 struct vsp1_device *vsp1 = wpf->entity.vsp1;
79 const struct v4l2_rect *crop = &wpf->crop;
80 unsigned int i;
81 u32 srcrpf = 0;
82 u32 outfmt = 0;
83 int ret;
84
85 ret = vsp1_entity_set_streaming(&wpf->entity, enable);
86 if (ret < 0)
87 return ret;
88
89 if (!enable) {
90 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
91 vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, 0);
92 return 0;
93 }
94
95 /* Sources. If the pipeline has a single input and BRU is not used,
96 * configure it as the master layer. Otherwise configure all
97 * inputs as sub-layers and select the virtual RPF as the master
98 * layer.
99 */
100 for (i = 0; i < pipe->num_inputs; ++i) {
101 struct vsp1_rwpf *input = pipe->inputs[i];
102
103 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
104 ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
105 : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
106 }
107
108 if (pipe->bru || pipe->num_inputs > 1)
109 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
110
111 vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
112
113 /* Destination stride. */
114 if (!pipe->lif) {
115 struct v4l2_pix_format_mplane *format = &wpf->video.format;
116
117 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
118 format->plane_fmt[0].bytesperline);
119 if (format->num_planes > 1)
120 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
121 format->plane_fmt[1].bytesperline);
122 }
123
124 vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
125 (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
126 (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
127 vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
128 (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
129 (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
130
131 /* Format */
132 if (!pipe->lif) {
133 const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
134
135 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
136
137 if (fmtinfo->alpha)
138 outfmt |= VI6_WPF_OUTFMT_PXA;
139 if (fmtinfo->swap_yc)
140 outfmt |= VI6_WPF_OUTFMT_SPYCS;
141 if (fmtinfo->swap_uv)
142 outfmt |= VI6_WPF_OUTFMT_SPUVS;
143
144 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
145 }
146
147 if (wpf->entity.formats[RWPF_PAD_SINK].code !=
148 wpf->entity.formats[RWPF_PAD_SOURCE].code)
149 outfmt |= VI6_WPF_OUTFMT_CSC;
150
151 /* Take the control handler lock to ensure that the PDV value won't be
152 * changed behind our back by a set control operation.
153 */
154 mutex_lock(wpf->ctrls.lock);
155 outfmt |= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK;
156 vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
157 mutex_unlock(wpf->ctrls.lock);
158
159 vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
160 VI6_DPR_WPF_FPORCH_FP_WPFN);
161
162 vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
163
164 /* Enable interrupts */
165 vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
166 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
167 VI6_WFP_IRQ_ENB_FREE);
168
169 return 0;
170 }
171
172 /* -----------------------------------------------------------------------------
173 * V4L2 Subdevice Operations
174 */
175
176 static struct v4l2_subdev_video_ops wpf_video_ops = {
177 .s_stream = wpf_s_stream,
178 };
179
180 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
181 .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
182 .enum_frame_size = vsp1_rwpf_enum_frame_size,
183 .get_fmt = vsp1_rwpf_get_format,
184 .set_fmt = vsp1_rwpf_set_format,
185 .get_selection = vsp1_rwpf_get_selection,
186 .set_selection = vsp1_rwpf_set_selection,
187 };
188
189 static struct v4l2_subdev_ops wpf_ops = {
190 .video = &wpf_video_ops,
191 .pad = &wpf_pad_ops,
192 };
193
194 /* -----------------------------------------------------------------------------
195 * Video Device Operations
196 */
197
wpf_vdev_queue(struct vsp1_video * video,struct vsp1_video_buffer * buf)198 static void wpf_vdev_queue(struct vsp1_video *video,
199 struct vsp1_video_buffer *buf)
200 {
201 struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
202
203 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
204 if (buf->buf.num_planes > 1)
205 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
206 if (buf->buf.num_planes > 2)
207 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
208 }
209
210 static const struct vsp1_video_operations wpf_vdev_ops = {
211 .queue = wpf_vdev_queue,
212 };
213
214 /* -----------------------------------------------------------------------------
215 * Initialization and Cleanup
216 */
217
vsp1_wpf_create(struct vsp1_device * vsp1,unsigned int index)218 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
219 {
220 struct v4l2_subdev *subdev;
221 struct vsp1_video *video;
222 struct vsp1_rwpf *wpf;
223 unsigned int flags;
224 int ret;
225
226 wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
227 if (wpf == NULL)
228 return ERR_PTR(-ENOMEM);
229
230 wpf->max_width = WPF_MAX_WIDTH;
231 wpf->max_height = WPF_MAX_HEIGHT;
232
233 wpf->entity.type = VSP1_ENTITY_WPF;
234 wpf->entity.index = index;
235
236 ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
237 if (ret < 0)
238 return ERR_PTR(ret);
239
240 /* Initialize the V4L2 subdev. */
241 subdev = &wpf->entity.subdev;
242 v4l2_subdev_init(subdev, &wpf_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 wpf.%u",
247 dev_name(vsp1->dev), index);
248 v4l2_set_subdevdata(subdev, wpf);
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(&wpf->ctrls, 1);
255 v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
256 0, 255, 1, 255);
257
258 wpf->entity.subdev.ctrl_handler = &wpf->ctrls;
259
260 if (wpf->ctrls.error) {
261 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
262 index);
263 ret = wpf->ctrls.error;
264 goto error;
265 }
266
267 /* Initialize the video device. */
268 video = &wpf->video;
269
270 video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
271 video->vsp1 = vsp1;
272 video->ops = &wpf_vdev_ops;
273
274 ret = vsp1_video_init(video, &wpf->entity);
275 if (ret < 0)
276 goto error;
277
278 wpf->entity.video = video;
279
280 /* Connect the video device to the WPF. All connections are immutable
281 * except for the WPF0 source link if a LIF is present.
282 */
283 flags = MEDIA_LNK_FL_ENABLED;
284 if (!(vsp1->pdata.features & VSP1_HAS_LIF) || index != 0)
285 flags |= MEDIA_LNK_FL_IMMUTABLE;
286
287 ret = media_entity_create_link(&wpf->entity.subdev.entity,
288 RWPF_PAD_SOURCE,
289 &wpf->video.video.entity, 0, flags);
290 if (ret < 0)
291 goto error;
292
293 wpf->entity.sink = &wpf->video.video.entity;
294
295 return wpf;
296
297 error:
298 vsp1_entity_destroy(&wpf->entity);
299 return ERR_PTR(ret);
300 }
301