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(uif->entity.vsp1,
32			 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 + 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, 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, 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(&uif->entity, sd_state, 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(&uif->entity, 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(&uif->entity, state,
117							sel->pad, sel->target);
118		break;
119
120	default:
121		ret = -EINVAL;
122		break;
123	}
124
125done:
126	mutex_unlock(&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(&uif->entity, sd_state, 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(&uif->entity, 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(&uif->entity, state,
164						  sel->pad, V4L2_SEL_TGT_CROP);
165	*selection = sel->r;
166
167done:
168	mutex_unlock(&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(&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, 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, left);
219	vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPYR, crop->top);
220	vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZXR, width);
221	vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZYR, 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(vsp1->dev, sizeof(*uif), GFP_KERNEL);
247	if (!uif)
248		return ERR_PTR(-ENOMEM);
249
250	if (soc_device_match(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(name, "uif.%u", index + 4);
259	ret = vsp1_entity_init(vsp1, &uif->entity, name, 2, &uif_ops,
260			       MEDIA_ENT_F_PROC_VIDEO_STATISTICS);
261	if (ret < 0)
262		return ERR_PTR(ret);
263
264	return uif;
265}
266