2 * vsp1_bru.c -- R-Car VSP1 Blend ROP Unit
4 * Copyright (C) 2013 Renesas Corporation
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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.
14 #include <linux/device.h>
15 #include <linux/gfp.h>
17 #include <media/v4l2-subdev.h>
21 #include "vsp1_rwpf.h"
23 #define BRU_MIN_SIZE 4U
24 #define BRU_MAX_SIZE 8190U
26 /* -----------------------------------------------------------------------------
30 static inline u32
vsp1_bru_read(struct vsp1_bru
*bru
, u32 reg
)
32 return vsp1_read(bru
->entity
.vsp1
, reg
);
35 static inline void vsp1_bru_write(struct vsp1_bru
*bru
, u32 reg
, u32 data
)
37 vsp1_write(bru
->entity
.vsp1
, reg
, data
);
40 /* -----------------------------------------------------------------------------
44 static int bru_s_ctrl(struct v4l2_ctrl
*ctrl
)
46 struct vsp1_bru
*bru
=
47 container_of(ctrl
->handler
, struct vsp1_bru
, ctrls
);
49 if (!vsp1_entity_is_streaming(&bru
->entity
))
53 case V4L2_CID_BG_COLOR
:
54 vsp1_bru_write(bru
, VI6_BRU_VIRRPF_COL
, ctrl
->val
|
55 (0xff << VI6_BRU_VIRRPF_COL_A_SHIFT
));
62 static const struct v4l2_ctrl_ops bru_ctrl_ops
= {
66 /* -----------------------------------------------------------------------------
67 * V4L2 Subdevice Core Operations
70 static int bru_s_stream(struct v4l2_subdev
*subdev
, int enable
)
72 struct vsp1_pipeline
*pipe
= to_vsp1_pipeline(&subdev
->entity
);
73 struct vsp1_bru
*bru
= to_bru(subdev
);
74 struct v4l2_mbus_framefmt
*format
;
79 ret
= vsp1_entity_set_streaming(&bru
->entity
, enable
);
86 format
= &bru
->entity
.formats
[BRU_PAD_SOURCE
];
88 /* The hardware is extremely flexible but we have no userspace API to
89 * expose all the parameters, nor is it clear whether we would have use
90 * cases for all the supported modes. Let's just harcode the parameters
91 * to sane default values for now.
94 /* Disable dithering and enable color data normalization unless the
95 * format at the pipeline output is premultiplied.
97 flags
= pipe
->output
? pipe
->output
->video
.format
.flags
: 0;
98 vsp1_bru_write(bru
, VI6_BRU_INCTRL
,
99 flags
& V4L2_PIX_FMT_FLAG_PREMUL_ALPHA
?
100 0 : VI6_BRU_INCTRL_NRM
);
102 /* Set the background position to cover the whole output image. */
103 vsp1_bru_write(bru
, VI6_BRU_VIRRPF_SIZE
,
104 (format
->width
<< VI6_BRU_VIRRPF_SIZE_HSIZE_SHIFT
) |
105 (format
->height
<< VI6_BRU_VIRRPF_SIZE_VSIZE_SHIFT
));
106 vsp1_bru_write(bru
, VI6_BRU_VIRRPF_LOC
, 0);
108 /* Route BRU input 1 as SRC input to the ROP unit and configure the ROP
109 * unit with a NOP operation to make BRU input 1 available as the
110 * Blend/ROP unit B SRC input.
112 vsp1_bru_write(bru
, VI6_BRU_ROP
, VI6_BRU_ROP_DSTSEL_BRUIN(1) |
113 VI6_BRU_ROP_CROP(VI6_ROP_NOP
) |
114 VI6_BRU_ROP_AROP(VI6_ROP_NOP
));
116 for (i
= 0; i
< 4; ++i
) {
117 bool premultiplied
= false;
120 /* Configure all Blend/ROP units corresponding to an enabled BRU
121 * input for alpha blending. Blend/ROP units corresponding to
122 * disabled BRU inputs are used in ROP NOP mode to ignore the
125 if (bru
->inputs
[i
].rpf
) {
126 ctrl
|= VI6_BRU_CTRL_RBC
;
128 premultiplied
= bru
->inputs
[i
].rpf
->video
.format
.flags
129 & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA
;
131 ctrl
|= VI6_BRU_CTRL_CROP(VI6_ROP_NOP
)
132 | VI6_BRU_CTRL_AROP(VI6_ROP_NOP
);
135 /* Select the virtual RPF as the Blend/ROP unit A DST input to
136 * serve as a background color.
139 ctrl
|= VI6_BRU_CTRL_DSTSEL_VRPF
;
141 /* Route BRU inputs 0 to 3 as SRC inputs to Blend/ROP units A to
142 * D in that order. The Blend/ROP unit B SRC is hardwired to the
143 * ROP unit output, the corresponding register bits must be set
147 ctrl
|= VI6_BRU_CTRL_SRCSEL_BRUIN(i
);
149 vsp1_bru_write(bru
, VI6_BRU_CTRL(i
), ctrl
);
151 /* Harcode the blending formula to
153 * DSTc = DSTc * (1 - SRCa) + SRCc * SRCa
154 * DSTa = DSTa * (1 - SRCa) + SRCa
156 * when the SRC input isn't premultiplied, and to
158 * DSTc = DSTc * (1 - SRCa) + SRCc
159 * DSTa = DSTa * (1 - SRCa) + SRCa
163 vsp1_bru_write(bru
, VI6_BRU_BLD(i
),
164 VI6_BRU_BLD_CCMDX_255_SRC_A
|
165 (premultiplied
? VI6_BRU_BLD_CCMDY_COEFY
:
166 VI6_BRU_BLD_CCMDY_SRC_A
) |
167 VI6_BRU_BLD_ACMDX_255_SRC_A
|
168 VI6_BRU_BLD_ACMDY_COEFY
|
169 (0xff << VI6_BRU_BLD_COEFY_SHIFT
));
175 /* -----------------------------------------------------------------------------
176 * V4L2 Subdevice Pad Operations
180 * The BRU can't perform format conversion, all sink and source formats must be
181 * identical. We pick the format on the first sink pad (pad 0) and propagate it
185 static int bru_enum_mbus_code(struct v4l2_subdev
*subdev
,
186 struct v4l2_subdev_fh
*fh
,
187 struct v4l2_subdev_mbus_code_enum
*code
)
189 static const unsigned int codes
[] = {
190 MEDIA_BUS_FMT_ARGB8888_1X32
,
191 MEDIA_BUS_FMT_AYUV8_1X32
,
193 struct v4l2_mbus_framefmt
*format
;
195 if (code
->pad
== BRU_PAD_SINK(0)) {
196 if (code
->index
>= ARRAY_SIZE(codes
))
199 code
->code
= codes
[code
->index
];
204 format
= v4l2_subdev_get_try_format(fh
, BRU_PAD_SINK(0));
205 code
->code
= format
->code
;
211 static int bru_enum_frame_size(struct v4l2_subdev
*subdev
,
212 struct v4l2_subdev_fh
*fh
,
213 struct v4l2_subdev_frame_size_enum
*fse
)
218 if (fse
->code
!= MEDIA_BUS_FMT_ARGB8888_1X32
&&
219 fse
->code
!= MEDIA_BUS_FMT_AYUV8_1X32
)
222 fse
->min_width
= BRU_MIN_SIZE
;
223 fse
->max_width
= BRU_MAX_SIZE
;
224 fse
->min_height
= BRU_MIN_SIZE
;
225 fse
->max_height
= BRU_MAX_SIZE
;
230 static struct v4l2_rect
*bru_get_compose(struct vsp1_bru
*bru
,
231 struct v4l2_subdev_fh
*fh
,
232 unsigned int pad
, u32 which
)
235 case V4L2_SUBDEV_FORMAT_TRY
:
236 return v4l2_subdev_get_try_crop(fh
, pad
);
237 case V4L2_SUBDEV_FORMAT_ACTIVE
:
238 return &bru
->inputs
[pad
].compose
;
244 static int bru_get_format(struct v4l2_subdev
*subdev
, struct v4l2_subdev_fh
*fh
,
245 struct v4l2_subdev_format
*fmt
)
247 struct vsp1_bru
*bru
= to_bru(subdev
);
249 fmt
->format
= *vsp1_entity_get_pad_format(&bru
->entity
, fh
, fmt
->pad
,
255 static void bru_try_format(struct vsp1_bru
*bru
, struct v4l2_subdev_fh
*fh
,
256 unsigned int pad
, struct v4l2_mbus_framefmt
*fmt
,
257 enum v4l2_subdev_format_whence which
)
259 struct v4l2_mbus_framefmt
*format
;
262 case BRU_PAD_SINK(0):
263 /* Default to YUV if the requested format is not supported. */
264 if (fmt
->code
!= MEDIA_BUS_FMT_ARGB8888_1X32
&&
265 fmt
->code
!= MEDIA_BUS_FMT_AYUV8_1X32
)
266 fmt
->code
= MEDIA_BUS_FMT_AYUV8_1X32
;
270 /* The BRU can't perform format conversion. */
271 format
= vsp1_entity_get_pad_format(&bru
->entity
, fh
,
272 BRU_PAD_SINK(0), which
);
273 fmt
->code
= format
->code
;
277 fmt
->width
= clamp(fmt
->width
, BRU_MIN_SIZE
, BRU_MAX_SIZE
);
278 fmt
->height
= clamp(fmt
->height
, BRU_MIN_SIZE
, BRU_MAX_SIZE
);
279 fmt
->field
= V4L2_FIELD_NONE
;
280 fmt
->colorspace
= V4L2_COLORSPACE_SRGB
;
283 static int bru_set_format(struct v4l2_subdev
*subdev
, struct v4l2_subdev_fh
*fh
,
284 struct v4l2_subdev_format
*fmt
)
286 struct vsp1_bru
*bru
= to_bru(subdev
);
287 struct v4l2_mbus_framefmt
*format
;
289 bru_try_format(bru
, fh
, fmt
->pad
, &fmt
->format
, fmt
->which
);
291 format
= vsp1_entity_get_pad_format(&bru
->entity
, fh
, fmt
->pad
,
293 *format
= fmt
->format
;
295 /* Reset the compose rectangle */
296 if (fmt
->pad
!= BRU_PAD_SOURCE
) {
297 struct v4l2_rect
*compose
;
299 compose
= bru_get_compose(bru
, fh
, fmt
->pad
, fmt
->which
);
302 compose
->width
= format
->width
;
303 compose
->height
= format
->height
;
306 /* Propagate the format code to all pads */
307 if (fmt
->pad
== BRU_PAD_SINK(0)) {
310 for (i
= 0; i
<= BRU_PAD_SOURCE
; ++i
) {
311 format
= vsp1_entity_get_pad_format(&bru
->entity
, fh
,
313 format
->code
= fmt
->format
.code
;
320 static int bru_get_selection(struct v4l2_subdev
*subdev
,
321 struct v4l2_subdev_fh
*fh
,
322 struct v4l2_subdev_selection
*sel
)
324 struct vsp1_bru
*bru
= to_bru(subdev
);
326 if (sel
->pad
== BRU_PAD_SOURCE
)
329 switch (sel
->target
) {
330 case V4L2_SEL_TGT_COMPOSE_BOUNDS
:
333 sel
->r
.width
= BRU_MAX_SIZE
;
334 sel
->r
.height
= BRU_MAX_SIZE
;
337 case V4L2_SEL_TGT_COMPOSE
:
338 sel
->r
= *bru_get_compose(bru
, fh
, sel
->pad
, sel
->which
);
346 static int bru_set_selection(struct v4l2_subdev
*subdev
,
347 struct v4l2_subdev_fh
*fh
,
348 struct v4l2_subdev_selection
*sel
)
350 struct vsp1_bru
*bru
= to_bru(subdev
);
351 struct v4l2_mbus_framefmt
*format
;
352 struct v4l2_rect
*compose
;
354 if (sel
->pad
== BRU_PAD_SOURCE
)
357 if (sel
->target
!= V4L2_SEL_TGT_COMPOSE
)
360 /* The compose rectangle top left corner must be inside the output
363 format
= vsp1_entity_get_pad_format(&bru
->entity
, fh
, BRU_PAD_SOURCE
,
365 sel
->r
.left
= clamp_t(unsigned int, sel
->r
.left
, 0, format
->width
- 1);
366 sel
->r
.top
= clamp_t(unsigned int, sel
->r
.top
, 0, format
->height
- 1);
368 /* Scaling isn't supported, the compose rectangle size must be identical
369 * to the sink format size.
371 format
= vsp1_entity_get_pad_format(&bru
->entity
, fh
, sel
->pad
,
373 sel
->r
.width
= format
->width
;
374 sel
->r
.height
= format
->height
;
376 compose
= bru_get_compose(bru
, fh
, sel
->pad
, sel
->which
);
382 /* -----------------------------------------------------------------------------
383 * V4L2 Subdevice Operations
386 static struct v4l2_subdev_video_ops bru_video_ops
= {
387 .s_stream
= bru_s_stream
,
390 static struct v4l2_subdev_pad_ops bru_pad_ops
= {
391 .enum_mbus_code
= bru_enum_mbus_code
,
392 .enum_frame_size
= bru_enum_frame_size
,
393 .get_fmt
= bru_get_format
,
394 .set_fmt
= bru_set_format
,
395 .get_selection
= bru_get_selection
,
396 .set_selection
= bru_set_selection
,
399 static struct v4l2_subdev_ops bru_ops
= {
400 .video
= &bru_video_ops
,
404 /* -----------------------------------------------------------------------------
405 * Initialization and Cleanup
408 struct vsp1_bru
*vsp1_bru_create(struct vsp1_device
*vsp1
)
410 struct v4l2_subdev
*subdev
;
411 struct vsp1_bru
*bru
;
414 bru
= devm_kzalloc(vsp1
->dev
, sizeof(*bru
), GFP_KERNEL
);
416 return ERR_PTR(-ENOMEM
);
418 bru
->entity
.type
= VSP1_ENTITY_BRU
;
420 ret
= vsp1_entity_init(vsp1
, &bru
->entity
, 5);
424 /* Initialize the V4L2 subdev. */
425 subdev
= &bru
->entity
.subdev
;
426 v4l2_subdev_init(subdev
, &bru_ops
);
428 subdev
->entity
.ops
= &vsp1_media_ops
;
429 subdev
->internal_ops
= &vsp1_subdev_internal_ops
;
430 snprintf(subdev
->name
, sizeof(subdev
->name
), "%s bru",
431 dev_name(vsp1
->dev
));
432 v4l2_set_subdevdata(subdev
, bru
);
433 subdev
->flags
|= V4L2_SUBDEV_FL_HAS_DEVNODE
;
435 vsp1_entity_init_formats(subdev
, NULL
);
437 /* Initialize the control handler. */
438 v4l2_ctrl_handler_init(&bru
->ctrls
, 1);
439 v4l2_ctrl_new_std(&bru
->ctrls
, &bru_ctrl_ops
, V4L2_CID_BG_COLOR
,
442 bru
->entity
.subdev
.ctrl_handler
= &bru
->ctrls
;
444 if (bru
->ctrls
.error
) {
445 dev_err(vsp1
->dev
, "bru: failed to initialize controls\n");
446 ret
= bru
->ctrls
.error
;
447 vsp1_entity_destroy(&bru
->entity
);