Correct .gbs.conf settings
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / media / platform / vsp1 / vsp1_wpf.c
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
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
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
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
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 configure it as the
96          * master layer. Otherwise configure all inputs as sub-layers and
97          * select the virtual RPF as the master layer.
98          */
99         for (i = 0; i < pipe->num_inputs; ++i) {
100                 struct vsp1_rwpf *input = pipe->inputs[i];
101
102                 srcrpf |= pipe->num_inputs == 1
103                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
104                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
105         }
106
107         if (pipe->num_inputs > 1)
108                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
109
110         vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
111
112         /* Destination stride. */
113         if (!pipe->lif) {
114                 struct v4l2_pix_format_mplane *format = &wpf->video.format;
115
116                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
117                                format->plane_fmt[0].bytesperline);
118                 if (format->num_planes > 1)
119                         vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
120                                        format->plane_fmt[1].bytesperline);
121         }
122
123         vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
124                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
125                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
126         vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
127                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
128                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
129
130         /* Format */
131         if (!pipe->lif) {
132                 const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
133
134                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
135
136                 if (fmtinfo->alpha)
137                         outfmt |= VI6_WPF_OUTFMT_PXA;
138                 if (fmtinfo->swap_yc)
139                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
140                 if (fmtinfo->swap_uv)
141                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
142
143                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
144         }
145
146         if (wpf->entity.formats[RWPF_PAD_SINK].code !=
147             wpf->entity.formats[RWPF_PAD_SOURCE].code)
148                 outfmt |= VI6_WPF_OUTFMT_CSC;
149
150         /* Take the control handler lock to ensure that the PDV value won't be
151          * changed behind our back by a set control operation.
152          */
153         mutex_lock(wpf->ctrls.lock);
154         outfmt |= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK;
155         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
156         mutex_unlock(wpf->ctrls.lock);
157
158         vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
159                    VI6_DPR_WPF_FPORCH_FP_WPFN);
160
161         vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
162
163         /* Enable interrupts */
164         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
165         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
166                    VI6_WFP_IRQ_ENB_FREE);
167
168         return 0;
169 }
170
171 /* -----------------------------------------------------------------------------
172  * V4L2 Subdevice Operations
173  */
174
175 static struct v4l2_subdev_video_ops wpf_video_ops = {
176         .s_stream = wpf_s_stream,
177 };
178
179 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
180         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
181         .enum_frame_size = vsp1_rwpf_enum_frame_size,
182         .get_fmt = vsp1_rwpf_get_format,
183         .set_fmt = vsp1_rwpf_set_format,
184         .get_selection = vsp1_rwpf_get_selection,
185         .set_selection = vsp1_rwpf_set_selection,
186 };
187
188 static struct v4l2_subdev_ops wpf_ops = {
189         .video  = &wpf_video_ops,
190         .pad    = &wpf_pad_ops,
191 };
192
193 /* -----------------------------------------------------------------------------
194  * Video Device Operations
195  */
196
197 static void wpf_vdev_queue(struct vsp1_video *video,
198                            struct vsp1_video_buffer *buf)
199 {
200         struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
201
202         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
203         if (buf->buf.num_planes > 1)
204                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
205         if (buf->buf.num_planes > 2)
206                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
207 }
208
209 static const struct vsp1_video_operations wpf_vdev_ops = {
210         .queue = wpf_vdev_queue,
211 };
212
213 /* -----------------------------------------------------------------------------
214  * Initialization and Cleanup
215  */
216
217 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
218 {
219         struct v4l2_subdev *subdev;
220         struct vsp1_video *video;
221         struct vsp1_rwpf *wpf;
222         unsigned int flags;
223         int ret;
224
225         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
226         if (wpf == NULL)
227                 return ERR_PTR(-ENOMEM);
228
229         wpf->max_width = WPF_MAX_WIDTH;
230         wpf->max_height = WPF_MAX_HEIGHT;
231
232         wpf->entity.type = VSP1_ENTITY_WPF;
233         wpf->entity.index = index;
234
235         ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
236         if (ret < 0)
237                 return ERR_PTR(ret);
238
239         /* Initialize the V4L2 subdev. */
240         subdev = &wpf->entity.subdev;
241         v4l2_subdev_init(subdev, &wpf_ops);
242
243         subdev->entity.ops = &vsp1_media_ops;
244         subdev->internal_ops = &vsp1_subdev_internal_ops;
245         snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
246                  dev_name(vsp1->dev), index);
247         v4l2_set_subdevdata(subdev, wpf);
248         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
249
250         vsp1_entity_init_formats(subdev, NULL);
251
252         /* Initialize the control handler. */
253         v4l2_ctrl_handler_init(&wpf->ctrls, 1);
254         v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
255                           0, 255, 1, 255);
256
257         wpf->entity.subdev.ctrl_handler = &wpf->ctrls;
258
259         if (wpf->ctrls.error) {
260                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
261                         index);
262                 ret = wpf->ctrls.error;
263                 goto error;
264         }
265
266         /* Initialize the video device. */
267         video = &wpf->video;
268
269         video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
270         video->vsp1 = vsp1;
271         video->ops = &wpf_vdev_ops;
272
273         ret = vsp1_video_init(video, &wpf->entity);
274         if (ret < 0)
275                 goto error;
276
277         wpf->entity.video = video;
278
279         /* Connect the video device to the WPF. All connections are immutable
280          * except for the WPF0 source link if a LIF is present.
281          */
282         flags = MEDIA_LNK_FL_ENABLED;
283         if (!(vsp1->pdata->features & VSP1_HAS_LIF) || index != 0)
284                 flags |= MEDIA_LNK_FL_IMMUTABLE;
285
286         ret = media_entity_create_link(&wpf->entity.subdev.entity,
287                                        RWPF_PAD_SOURCE,
288                                        &wpf->video.video.entity, 0, flags);
289         if (ret < 0)
290                 goto error;
291
292         wpf->entity.sink = &wpf->video.video.entity;
293
294         return wpf;
295
296 error:
297         vsp1_entity_destroy(&wpf->entity);
298         return ERR_PTR(ret);
299 }