1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * vsp1_uif.c -- R-Car VSP1 User Logic Interface
4 *
5 * Copyright (C) 2017-2018 Laurent Pinchart
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10#include <linux/device.h>
11#include <linux/gfp.h>
12#include <linux/sys_soc.h>
13
14#include <media/media-entity.h>
15#include <media/v4l2-subdev.h>
16
17#include "vsp1.h"
18#include "vsp1_dl.h"
19#include "vsp1_entity.h"
20#include "vsp1_uif.h"
21
22#define UIF_MIN_SIZE 4U
23#define UIF_MAX_SIZE 8190U
24
25/* -----------------------------------------------------------------------------
26 * Device Access
27 */
28
29static inline u32 vsp1_uif_read(struct vsp1_uif *uif, u32 reg)
30{
31 return vsp1_read(vsp1: uif->entity.vsp1,
32 reg: uif->entity.index * VI6_UIF_OFFSET + reg);
33}
34
35static inline void vsp1_uif_write(struct vsp1_uif *uif,
36 struct vsp1_dl_body *dlb, u32 reg, u32 data)
37{
38 vsp1_dl_body_write(dlb, reg: reg + uif->entity.index * VI6_UIF_OFFSET, data);
39}
40
41u32 vsp1_uif_get_crc(struct vsp1_uif *uif)
42{
43 return vsp1_uif_read(uif, VI6_UIF_DISCOM_DOCMCCRCR);
44}
45
46/* -----------------------------------------------------------------------------
47 * V4L2 Subdevice Pad Operations
48 */
49
50static const unsigned int uif_codes[] = {
51 MEDIA_BUS_FMT_ARGB8888_1X32,
52 MEDIA_BUS_FMT_AHSV8888_1X32,
53 MEDIA_BUS_FMT_AYUV8_1X32,
54};
55
56static int uif_enum_mbus_code(struct v4l2_subdev *subdev,
57 struct v4l2_subdev_state *sd_state,
58 struct v4l2_subdev_mbus_code_enum *code)
59{
60 return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, codes: uif_codes,
61 ARRAY_SIZE(uif_codes));
62}
63
64static int uif_enum_frame_size(struct v4l2_subdev *subdev,
65 struct v4l2_subdev_state *sd_state,
66 struct v4l2_subdev_frame_size_enum *fse)
67{
68 return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
69 UIF_MIN_SIZE,
70 UIF_MIN_SIZE, UIF_MAX_SIZE,
71 UIF_MAX_SIZE);
72}
73
74static int uif_set_format(struct v4l2_subdev *subdev,
75 struct v4l2_subdev_state *sd_state,
76 struct v4l2_subdev_format *fmt)
77{
78 return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, codes: uif_codes,
79 ARRAY_SIZE(uif_codes),
80 UIF_MIN_SIZE, UIF_MIN_SIZE,
81 UIF_MAX_SIZE, UIF_MAX_SIZE);
82}
83
84static int uif_get_selection(struct v4l2_subdev *subdev,
85 struct v4l2_subdev_state *sd_state,
86 struct v4l2_subdev_selection *sel)
87{
88 struct vsp1_uif *uif = to_uif(subdev);
89 struct v4l2_subdev_state *state;
90 struct v4l2_mbus_framefmt *format;
91 int ret = 0;
92
93 if (sel->pad != UIF_PAD_SINK)
94 return -EINVAL;
95
96 mutex_lock(&uif->entity.lock);
97
98 state = vsp1_entity_get_state(entity: &uif->entity, sd_state, which: sel->which);
99 if (!state) {
100 ret = -EINVAL;
101 goto done;
102 }
103
104 switch (sel->target) {
105 case V4L2_SEL_TGT_CROP_BOUNDS:
106 case V4L2_SEL_TGT_CROP_DEFAULT:
107 format = vsp1_entity_get_pad_format(entity: &uif->entity, sd_state: state,
108 UIF_PAD_SINK);
109 sel->r.left = 0;
110 sel->r.top = 0;
111 sel->r.width = format->width;
112 sel->r.height = format->height;
113 break;
114
115 case V4L2_SEL_TGT_CROP:
116 sel->r = *vsp1_entity_get_pad_selection(entity: &uif->entity, sd_state: state,
117 pad: sel->pad, target: sel->target);
118 break;
119
120 default:
121 ret = -EINVAL;
122 break;
123 }
124
125done:
126 mutex_unlock(lock: &uif->entity.lock);
127 return ret;
128}
129
130static int uif_set_selection(struct v4l2_subdev *subdev,
131 struct v4l2_subdev_state *sd_state,
132 struct v4l2_subdev_selection *sel)
133{
134 struct vsp1_uif *uif = to_uif(subdev);
135 struct v4l2_subdev_state *state;
136 struct v4l2_mbus_framefmt *format;
137 struct v4l2_rect *selection;
138 int ret = 0;
139
140 if (sel->pad != UIF_PAD_SINK ||
141 sel->target != V4L2_SEL_TGT_CROP)
142 return -EINVAL;
143
144 mutex_lock(&uif->entity.lock);
145
146 state = vsp1_entity_get_state(entity: &uif->entity, sd_state, which: sel->which);
147 if (!state) {
148 ret = -EINVAL;
149 goto done;
150 }
151
152 /* The crop rectangle must be inside the input frame. */
153 format = vsp1_entity_get_pad_format(entity: &uif->entity, sd_state: state, UIF_PAD_SINK);
154
155 sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1);
156 sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);
157 sel->r.width = clamp_t(unsigned int, sel->r.width, UIF_MIN_SIZE,
158 format->width - sel->r.left);
159 sel->r.height = clamp_t(unsigned int, sel->r.height, UIF_MIN_SIZE,
160 format->height - sel->r.top);
161
162 /* Store the crop rectangle. */
163 selection = vsp1_entity_get_pad_selection(entity: &uif->entity, sd_state: state,
164 pad: sel->pad, V4L2_SEL_TGT_CROP);
165 *selection = sel->r;
166
167done:
168 mutex_unlock(lock: &uif->entity.lock);
169 return ret;
170}
171
172/* -----------------------------------------------------------------------------
173 * V4L2 Subdevice Operations
174 */
175
176static const struct v4l2_subdev_pad_ops uif_pad_ops = {
177 .enum_mbus_code = uif_enum_mbus_code,
178 .enum_frame_size = uif_enum_frame_size,
179 .get_fmt = vsp1_subdev_get_pad_format,
180 .set_fmt = uif_set_format,
181 .get_selection = uif_get_selection,
182 .set_selection = uif_set_selection,
183};
184
185static const struct v4l2_subdev_ops uif_ops = {
186 .pad = &uif_pad_ops,
187};
188
189/* -----------------------------------------------------------------------------
190 * VSP1 Entity Operations
191 */
192
193static void uif_configure_stream(struct vsp1_entity *entity,
194 struct vsp1_pipeline *pipe,
195 struct vsp1_dl_list *dl,
196 struct vsp1_dl_body *dlb)
197{
198 struct vsp1_uif *uif = to_uif(subdev: &entity->subdev);
199 const struct v4l2_rect *crop;
200 unsigned int left;
201 unsigned int width;
202
203 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMPMR,
204 VI6_UIF_DISCOM_DOCMPMR_SEL(9));
205
206 crop = vsp1_entity_get_pad_selection(entity, sd_state: entity->state,
207 UIF_PAD_SINK, V4L2_SEL_TGT_CROP);
208
209 left = crop->left;
210 width = crop->width;
211
212 /* On M3-W the horizontal coordinates are twice the register value. */
213 if (uif->m3w_quirk) {
214 left /= 2;
215 width /= 2;
216 }
217
218 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPXR, data: left);
219 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPYR, data: crop->top);
220 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZXR, data: width);
221 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZYR, data: crop->height);
222
223 vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMCR,
224 VI6_UIF_DISCOM_DOCMCR_CMPR);
225}
226
227static const struct vsp1_entity_operations uif_entity_ops = {
228 .configure_stream = uif_configure_stream,
229};
230
231/* -----------------------------------------------------------------------------
232 * Initialization and Cleanup
233 */
234
235static const struct soc_device_attribute vsp1_r8a7796[] = {
236 { .soc_id = "r8a7796" },
237 { /* sentinel */ }
238};
239
240struct vsp1_uif *vsp1_uif_create(struct vsp1_device *vsp1, unsigned int index)
241{
242 struct vsp1_uif *uif;
243 char name[6];
244 int ret;
245
246 uif = devm_kzalloc(dev: vsp1->dev, size: sizeof(*uif), GFP_KERNEL);
247 if (!uif)
248 return ERR_PTR(error: -ENOMEM);
249
250 if (soc_device_match(matches: vsp1_r8a7796))
251 uif->m3w_quirk = true;
252
253 uif->entity.ops = &uif_entity_ops;
254 uif->entity.type = VSP1_ENTITY_UIF;
255 uif->entity.index = index;
256
257 /* The datasheet names the two UIF instances UIF4 and UIF5. */
258 sprintf(buf: name, fmt: "uif.%u", index + 4);
259 ret = vsp1_entity_init(vsp1, entity: &uif->entity, name, num_pads: 2, ops: &uif_ops,
260 MEDIA_ENT_F_PROC_VIDEO_STATISTICS);
261 if (ret < 0)
262 return ERR_PTR(error: ret);
263
264 return uif;
265}
266

source code of linux/drivers/media/platform/renesas/vsp1/vsp1_uif.c