1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4  * Author: Jacob Chen <jacob-chen@iotwrt.com>
5  */
6 
7 #include <linux/clk.h>
8 #include <linux/debugfs.h>
9 #include <linux/delay.h>
10 #include <linux/fs.h>
11 #include <linux/interrupt.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/reset.h>
16 #include <linux/sched.h>
17 #include <linux/slab.h>
18 #include <linux/timer.h>
19 
20 #include <linux/platform_device.h>
21 #include <media/v4l2-device.h>
22 #include <media/v4l2-event.h>
23 #include <media/v4l2-ioctl.h>
24 #include <media/v4l2-mem2mem.h>
25 #include <media/videobuf2-dma-sg.h>
26 #include <media/videobuf2-v4l2.h>
27 
28 #include "rga-hw.h"
29 #include "rga.h"
30 
31 static int debug;
32 module_param(debug, int, 0644);
33 
34 static void device_run(void *prv)
35 {
36 	struct rga_ctx *ctx = prv;
37 	struct rockchip_rga *rga = ctx->rga;
38 	struct vb2_v4l2_buffer *src, *dst;
39 	unsigned long flags;
40 
41 	spin_lock_irqsave(&rga->ctrl_lock, flags);
42 
43 	rga->curr = ctx;
44 
45 	src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
46 	dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
47 
48 	rga_buf_map(&src->vb2_buf);
49 	rga_buf_map(&dst->vb2_buf);
50 
51 	rga_hw_start(rga);
52 
53 	spin_unlock_irqrestore(&rga->ctrl_lock, flags);
54 }
55 
56 static irqreturn_t rga_isr(int irq, void *prv)
57 {
58 	struct rockchip_rga *rga = prv;
59 	int intr;
60 
61 	intr = rga_read(rga, RGA_INT) & 0xf;
62 
63 	rga_mod(rga, RGA_INT, intr << 4, 0xf << 4);
64 
65 	if (intr & 0x04) {
66 		struct vb2_v4l2_buffer *src, *dst;
67 		struct rga_ctx *ctx = rga->curr;
68 
69 		WARN_ON(!ctx);
70 
71 		rga->curr = NULL;
72 
73 		src = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
74 		dst = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
75 
76 		WARN_ON(!src);
77 		WARN_ON(!dst);
78 
79 		dst->timecode = src->timecode;
80 		dst->vb2_buf.timestamp = src->vb2_buf.timestamp;
81 		dst->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
82 		dst->flags |= src->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
83 
84 		v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
85 		v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
86 		v4l2_m2m_job_finish(rga->m2m_dev, ctx->fh.m2m_ctx);
87 	}
88 
89 	return IRQ_HANDLED;
90 }
91 
92 static const struct v4l2_m2m_ops rga_m2m_ops = {
93 	.device_run = device_run,
94 };
95 
96 static int
97 queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
98 {
99 	struct rga_ctx *ctx = priv;
100 	int ret;
101 
102 	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
103 	src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
104 	src_vq->drv_priv = ctx;
105 	src_vq->ops = &rga_qops;
106 	src_vq->mem_ops = &vb2_dma_sg_memops;
107 	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
108 	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
109 	src_vq->lock = &ctx->rga->mutex;
110 	src_vq->dev = ctx->rga->v4l2_dev.dev;
111 
112 	ret = vb2_queue_init(src_vq);
113 	if (ret)
114 		return ret;
115 
116 	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
117 	dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
118 	dst_vq->drv_priv = ctx;
119 	dst_vq->ops = &rga_qops;
120 	dst_vq->mem_ops = &vb2_dma_sg_memops;
121 	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
122 	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
123 	dst_vq->lock = &ctx->rga->mutex;
124 	dst_vq->dev = ctx->rga->v4l2_dev.dev;
125 
126 	return vb2_queue_init(dst_vq);
127 }
128 
129 static int rga_s_ctrl(struct v4l2_ctrl *ctrl)
130 {
131 	struct rga_ctx *ctx = container_of(ctrl->handler, struct rga_ctx,
132 					   ctrl_handler);
133 	unsigned long flags;
134 
135 	spin_lock_irqsave(&ctx->rga->ctrl_lock, flags);
136 	switch (ctrl->id) {
137 	case V4L2_CID_HFLIP:
138 		ctx->hflip = ctrl->val;
139 		break;
140 	case V4L2_CID_VFLIP:
141 		ctx->vflip = ctrl->val;
142 		break;
143 	case V4L2_CID_ROTATE:
144 		ctx->rotate = ctrl->val;
145 		break;
146 	case V4L2_CID_BG_COLOR:
147 		ctx->fill_color = ctrl->val;
148 		break;
149 	}
150 	spin_unlock_irqrestore(&ctx->rga->ctrl_lock, flags);
151 	return 0;
152 }
153 
154 static const struct v4l2_ctrl_ops rga_ctrl_ops = {
155 	.s_ctrl = rga_s_ctrl,
156 };
157 
158 static int rga_setup_ctrls(struct rga_ctx *ctx)
159 {
160 	struct rockchip_rga *rga = ctx->rga;
161 
162 	v4l2_ctrl_handler_init(&ctx->ctrl_handler, 4);
163 
164 	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
165 			  V4L2_CID_HFLIP, 0, 1, 1, 0);
166 
167 	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
168 			  V4L2_CID_VFLIP, 0, 1, 1, 0);
169 
170 	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
171 			  V4L2_CID_ROTATE, 0, 270, 90, 0);
172 
173 	v4l2_ctrl_new_std(&ctx->ctrl_handler, &rga_ctrl_ops,
174 			  V4L2_CID_BG_COLOR, 0, 0xffffffff, 1, 0);
175 
176 	if (ctx->ctrl_handler.error) {
177 		int err = ctx->ctrl_handler.error;
178 
179 		v4l2_err(&rga->v4l2_dev, "%s failed\n", __func__);
180 		v4l2_ctrl_handler_free(&ctx->ctrl_handler);
181 		return err;
182 	}
183 
184 	return 0;
185 }
186 
187 static struct rga_fmt formats[] = {
188 	{
189 		.fourcc = V4L2_PIX_FMT_ARGB32,
190 		.color_swap = RGA_COLOR_RB_SWAP,
191 		.hw_format = RGA_COLOR_FMT_ABGR8888,
192 		.depth = 32,
193 		.uv_factor = 1,
194 		.y_div = 1,
195 		.x_div = 1,
196 	},
197 	{
198 		.fourcc = V4L2_PIX_FMT_XRGB32,
199 		.color_swap = RGA_COLOR_RB_SWAP,
200 		.hw_format = RGA_COLOR_FMT_XBGR8888,
201 		.depth = 32,
202 		.uv_factor = 1,
203 		.y_div = 1,
204 		.x_div = 1,
205 	},
206 	{
207 		.fourcc = V4L2_PIX_FMT_ABGR32,
208 		.color_swap = RGA_COLOR_ALPHA_SWAP,
209 		.hw_format = RGA_COLOR_FMT_ABGR8888,
210 		.depth = 32,
211 		.uv_factor = 1,
212 		.y_div = 1,
213 		.x_div = 1,
214 	},
215 	{
216 		.fourcc = V4L2_PIX_FMT_XBGR32,
217 		.color_swap = RGA_COLOR_ALPHA_SWAP,
218 		.hw_format = RGA_COLOR_FMT_XBGR8888,
219 		.depth = 32,
220 		.uv_factor = 1,
221 		.y_div = 1,
222 		.x_div = 1,
223 	},
224 	{
225 		.fourcc = V4L2_PIX_FMT_RGB24,
226 		.color_swap = RGA_COLOR_NONE_SWAP,
227 		.hw_format = RGA_COLOR_FMT_RGB888,
228 		.depth = 24,
229 		.uv_factor = 1,
230 		.y_div = 1,
231 		.x_div = 1,
232 	},
233 	{
234 		.fourcc = V4L2_PIX_FMT_BGR24,
235 		.color_swap = RGA_COLOR_RB_SWAP,
236 		.hw_format = RGA_COLOR_FMT_RGB888,
237 		.depth = 24,
238 		.uv_factor = 1,
239 		.y_div = 1,
240 		.x_div = 1,
241 	},
242 	{
243 		.fourcc = V4L2_PIX_FMT_ARGB444,
244 		.color_swap = RGA_COLOR_RB_SWAP,
245 		.hw_format = RGA_COLOR_FMT_ABGR4444,
246 		.depth = 16,
247 		.uv_factor = 1,
248 		.y_div = 1,
249 		.x_div = 1,
250 	},
251 	{
252 		.fourcc = V4L2_PIX_FMT_ARGB555,
253 		.color_swap = RGA_COLOR_RB_SWAP,
254 		.hw_format = RGA_COLOR_FMT_ABGR1555,
255 		.depth = 16,
256 		.uv_factor = 1,
257 		.y_div = 1,
258 		.x_div = 1,
259 	},
260 	{
261 		.fourcc = V4L2_PIX_FMT_RGB565,
262 		.color_swap = RGA_COLOR_RB_SWAP,
263 		.hw_format = RGA_COLOR_FMT_BGR565,
264 		.depth = 16,
265 		.uv_factor = 1,
266 		.y_div = 1,
267 		.x_div = 1,
268 	},
269 	{
270 		.fourcc = V4L2_PIX_FMT_NV21,
271 		.color_swap = RGA_COLOR_UV_SWAP,
272 		.hw_format = RGA_COLOR_FMT_YUV420SP,
273 		.depth = 12,
274 		.uv_factor = 4,
275 		.y_div = 2,
276 		.x_div = 1,
277 	},
278 	{
279 		.fourcc = V4L2_PIX_FMT_NV61,
280 		.color_swap = RGA_COLOR_UV_SWAP,
281 		.hw_format = RGA_COLOR_FMT_YUV422SP,
282 		.depth = 16,
283 		.uv_factor = 2,
284 		.y_div = 1,
285 		.x_div = 1,
286 	},
287 	{
288 		.fourcc = V4L2_PIX_FMT_NV12,
289 		.color_swap = RGA_COLOR_NONE_SWAP,
290 		.hw_format = RGA_COLOR_FMT_YUV420SP,
291 		.depth = 12,
292 		.uv_factor = 4,
293 		.y_div = 2,
294 		.x_div = 1,
295 	},
296 	{
297 		.fourcc = V4L2_PIX_FMT_NV16,
298 		.color_swap = RGA_COLOR_NONE_SWAP,
299 		.hw_format = RGA_COLOR_FMT_YUV422SP,
300 		.depth = 16,
301 		.uv_factor = 2,
302 		.y_div = 1,
303 		.x_div = 1,
304 	},
305 	{
306 		.fourcc = V4L2_PIX_FMT_YUV420,
307 		.color_swap = RGA_COLOR_NONE_SWAP,
308 		.hw_format = RGA_COLOR_FMT_YUV420P,
309 		.depth = 12,
310 		.uv_factor = 4,
311 		.y_div = 2,
312 		.x_div = 2,
313 	},
314 	{
315 		.fourcc = V4L2_PIX_FMT_YUV422P,
316 		.color_swap = RGA_COLOR_NONE_SWAP,
317 		.hw_format = RGA_COLOR_FMT_YUV422P,
318 		.depth = 16,
319 		.uv_factor = 2,
320 		.y_div = 1,
321 		.x_div = 2,
322 	},
323 	{
324 		.fourcc = V4L2_PIX_FMT_YVU420,
325 		.color_swap = RGA_COLOR_UV_SWAP,
326 		.hw_format = RGA_COLOR_FMT_YUV420P,
327 		.depth = 12,
328 		.uv_factor = 4,
329 		.y_div = 2,
330 		.x_div = 2,
331 	},
332 };
333 
334 #define NUM_FORMATS ARRAY_SIZE(formats)
335 
336 static struct rga_fmt *rga_fmt_find(struct v4l2_format *f)
337 {
338 	unsigned int i;
339 
340 	for (i = 0; i < NUM_FORMATS; i++) {
341 		if (formats[i].fourcc == f->fmt.pix.pixelformat)
342 			return &formats[i];
343 	}
344 	return NULL;
345 }
346 
347 static struct rga_frame def_frame = {
348 	.width = DEFAULT_WIDTH,
349 	.height = DEFAULT_HEIGHT,
350 	.colorspace = V4L2_COLORSPACE_DEFAULT,
351 	.crop.left = 0,
352 	.crop.top = 0,
353 	.crop.width = DEFAULT_WIDTH,
354 	.crop.height = DEFAULT_HEIGHT,
355 	.fmt = &formats[0],
356 };
357 
358 struct rga_frame *rga_get_frame(struct rga_ctx *ctx, enum v4l2_buf_type type)
359 {
360 	switch (type) {
361 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
362 		return &ctx->in;
363 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
364 		return &ctx->out;
365 	default:
366 		return ERR_PTR(-EINVAL);
367 	}
368 }
369 
370 static int rga_open(struct file *file)
371 {
372 	struct rockchip_rga *rga = video_drvdata(file);
373 	struct rga_ctx *ctx = NULL;
374 	int ret = 0;
375 
376 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
377 	if (!ctx)
378 		return -ENOMEM;
379 	ctx->rga = rga;
380 	/* Set default formats */
381 	ctx->in = def_frame;
382 	ctx->out = def_frame;
383 
384 	if (mutex_lock_interruptible(&rga->mutex)) {
385 		kfree(ctx);
386 		return -ERESTARTSYS;
387 	}
388 	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(rga->m2m_dev, ctx, &queue_init);
389 	if (IS_ERR(ctx->fh.m2m_ctx)) {
390 		ret = PTR_ERR(ctx->fh.m2m_ctx);
391 		mutex_unlock(&rga->mutex);
392 		kfree(ctx);
393 		return ret;
394 	}
395 	v4l2_fh_init(&ctx->fh, video_devdata(file));
396 	file->private_data = &ctx->fh;
397 	v4l2_fh_add(&ctx->fh);
398 
399 	rga_setup_ctrls(ctx);
400 
401 	/* Write the default values to the ctx struct */
402 	v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
403 
404 	ctx->fh.ctrl_handler = &ctx->ctrl_handler;
405 	mutex_unlock(&rga->mutex);
406 
407 	return 0;
408 }
409 
410 static int rga_release(struct file *file)
411 {
412 	struct rga_ctx *ctx =
413 		container_of(file->private_data, struct rga_ctx, fh);
414 	struct rockchip_rga *rga = ctx->rga;
415 
416 	mutex_lock(&rga->mutex);
417 
418 	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
419 
420 	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
421 	v4l2_fh_del(&ctx->fh);
422 	v4l2_fh_exit(&ctx->fh);
423 	kfree(ctx);
424 
425 	mutex_unlock(&rga->mutex);
426 
427 	return 0;
428 }
429 
430 static const struct v4l2_file_operations rga_fops = {
431 	.owner = THIS_MODULE,
432 	.open = rga_open,
433 	.release = rga_release,
434 	.poll = v4l2_m2m_fop_poll,
435 	.unlocked_ioctl = video_ioctl2,
436 	.mmap = v4l2_m2m_fop_mmap,
437 };
438 
439 static int
440 vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap)
441 {
442 	strscpy(cap->driver, RGA_NAME, sizeof(cap->driver));
443 	strscpy(cap->card, "rockchip-rga", sizeof(cap->card));
444 	strscpy(cap->bus_info, "platform:rga", sizeof(cap->bus_info));
445 
446 	return 0;
447 }
448 
449 static int vidioc_enum_fmt(struct file *file, void *prv, struct v4l2_fmtdesc *f)
450 {
451 	struct rga_fmt *fmt;
452 
453 	if (f->index >= NUM_FORMATS)
454 		return -EINVAL;
455 
456 	fmt = &formats[f->index];
457 	f->pixelformat = fmt->fourcc;
458 
459 	return 0;
460 }
461 
462 static int vidioc_g_fmt(struct file *file, void *prv, struct v4l2_format *f)
463 {
464 	struct rga_ctx *ctx = prv;
465 	struct vb2_queue *vq;
466 	struct rga_frame *frm;
467 
468 	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
469 	if (!vq)
470 		return -EINVAL;
471 	frm = rga_get_frame(ctx, f->type);
472 	if (IS_ERR(frm))
473 		return PTR_ERR(frm);
474 
475 	f->fmt.pix.width = frm->width;
476 	f->fmt.pix.height = frm->height;
477 	f->fmt.pix.field = V4L2_FIELD_NONE;
478 	f->fmt.pix.pixelformat = frm->fmt->fourcc;
479 	f->fmt.pix.bytesperline = frm->stride;
480 	f->fmt.pix.sizeimage = frm->size;
481 	f->fmt.pix.colorspace = frm->colorspace;
482 
483 	return 0;
484 }
485 
486 static int vidioc_try_fmt(struct file *file, void *prv, struct v4l2_format *f)
487 {
488 	struct rga_fmt *fmt;
489 
490 	fmt = rga_fmt_find(f);
491 	if (!fmt) {
492 		fmt = &formats[0];
493 		f->fmt.pix.pixelformat = fmt->fourcc;
494 	}
495 
496 	f->fmt.pix.field = V4L2_FIELD_NONE;
497 
498 	if (f->fmt.pix.width > MAX_WIDTH)
499 		f->fmt.pix.width = MAX_WIDTH;
500 	if (f->fmt.pix.height > MAX_HEIGHT)
501 		f->fmt.pix.height = MAX_HEIGHT;
502 
503 	if (f->fmt.pix.width < MIN_WIDTH)
504 		f->fmt.pix.width = MIN_WIDTH;
505 	if (f->fmt.pix.height < MIN_HEIGHT)
506 		f->fmt.pix.height = MIN_HEIGHT;
507 
508 	if (fmt->hw_format >= RGA_COLOR_FMT_YUV422SP)
509 		f->fmt.pix.bytesperline = f->fmt.pix.width;
510 	else
511 		f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
512 
513 	f->fmt.pix.sizeimage =
514 		f->fmt.pix.height * (f->fmt.pix.width * fmt->depth) >> 3;
515 
516 	return 0;
517 }
518 
519 static int vidioc_s_fmt(struct file *file, void *prv, struct v4l2_format *f)
520 {
521 	struct rga_ctx *ctx = prv;
522 	struct rockchip_rga *rga = ctx->rga;
523 	struct vb2_queue *vq;
524 	struct rga_frame *frm;
525 	struct rga_fmt *fmt;
526 	int ret = 0;
527 
528 	/* Adjust all values accordingly to the hardware capabilities
529 	 * and chosen format.
530 	 */
531 	ret = vidioc_try_fmt(file, prv, f);
532 	if (ret)
533 		return ret;
534 	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
535 	if (vb2_is_busy(vq)) {
536 		v4l2_err(&rga->v4l2_dev, "queue (%d) bust\n", f->type);
537 		return -EBUSY;
538 	}
539 	frm = rga_get_frame(ctx, f->type);
540 	if (IS_ERR(frm))
541 		return PTR_ERR(frm);
542 	fmt = rga_fmt_find(f);
543 	if (!fmt)
544 		return -EINVAL;
545 	frm->width = f->fmt.pix.width;
546 	frm->height = f->fmt.pix.height;
547 	frm->size = f->fmt.pix.sizeimage;
548 	frm->fmt = fmt;
549 	frm->stride = f->fmt.pix.bytesperline;
550 	frm->colorspace = f->fmt.pix.colorspace;
551 
552 	/* Reset crop settings */
553 	frm->crop.left = 0;
554 	frm->crop.top = 0;
555 	frm->crop.width = frm->width;
556 	frm->crop.height = frm->height;
557 
558 	return 0;
559 }
560 
561 static int vidioc_g_selection(struct file *file, void *prv,
562 			      struct v4l2_selection *s)
563 {
564 	struct rga_ctx *ctx = prv;
565 	struct rga_frame *f;
566 	bool use_frame = false;
567 
568 	f = rga_get_frame(ctx, s->type);
569 	if (IS_ERR(f))
570 		return PTR_ERR(f);
571 
572 	switch (s->target) {
573 	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
574 	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
575 		if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
576 			return -EINVAL;
577 		break;
578 	case V4L2_SEL_TGT_CROP_DEFAULT:
579 	case V4L2_SEL_TGT_CROP_BOUNDS:
580 		if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
581 			return -EINVAL;
582 		break;
583 	case V4L2_SEL_TGT_COMPOSE:
584 		if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
585 			return -EINVAL;
586 		use_frame = true;
587 		break;
588 	case V4L2_SEL_TGT_CROP:
589 		if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
590 			return -EINVAL;
591 		use_frame = true;
592 		break;
593 	default:
594 		return -EINVAL;
595 	}
596 
597 	if (use_frame) {
598 		s->r = f->crop;
599 	} else {
600 		s->r.left = 0;
601 		s->r.top = 0;
602 		s->r.width = f->width;
603 		s->r.height = f->height;
604 	}
605 
606 	return 0;
607 }
608 
609 static int vidioc_s_selection(struct file *file, void *prv,
610 			      struct v4l2_selection *s)
611 {
612 	struct rga_ctx *ctx = prv;
613 	struct rockchip_rga *rga = ctx->rga;
614 	struct rga_frame *f;
615 	int ret = 0;
616 
617 	f = rga_get_frame(ctx, s->type);
618 	if (IS_ERR(f))
619 		return PTR_ERR(f);
620 
621 	switch (s->target) {
622 	case V4L2_SEL_TGT_COMPOSE:
623 		/*
624 		 * COMPOSE target is only valid for capture buffer type, return
625 		 * error for output buffer type
626 		 */
627 		if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
628 			return -EINVAL;
629 		break;
630 	case V4L2_SEL_TGT_CROP:
631 		/*
632 		 * CROP target is only valid for output buffer type, return
633 		 * error for capture buffer type
634 		 */
635 		if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
636 			return -EINVAL;
637 		break;
638 	/*
639 	 * bound and default crop/compose targets are invalid targets to
640 	 * try/set
641 	 */
642 	default:
643 		return -EINVAL;
644 	}
645 
646 	if (s->r.top < 0 || s->r.left < 0) {
647 		v4l2_dbg(debug, 1, &rga->v4l2_dev,
648 			 "doesn't support negative values for top & left.\n");
649 		return -EINVAL;
650 	}
651 
652 	if (s->r.left + s->r.width > f->width ||
653 	    s->r.top + s->r.height > f->height ||
654 	    s->r.width < MIN_WIDTH || s->r.height < MIN_HEIGHT) {
655 		v4l2_dbg(debug, 1, &rga->v4l2_dev, "unsupported crop value.\n");
656 		return -EINVAL;
657 	}
658 
659 	f->crop = s->r;
660 
661 	return ret;
662 }
663 
664 static const struct v4l2_ioctl_ops rga_ioctl_ops = {
665 	.vidioc_querycap = vidioc_querycap,
666 
667 	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
668 	.vidioc_g_fmt_vid_cap = vidioc_g_fmt,
669 	.vidioc_try_fmt_vid_cap = vidioc_try_fmt,
670 	.vidioc_s_fmt_vid_cap = vidioc_s_fmt,
671 
672 	.vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
673 	.vidioc_g_fmt_vid_out = vidioc_g_fmt,
674 	.vidioc_try_fmt_vid_out = vidioc_try_fmt,
675 	.vidioc_s_fmt_vid_out = vidioc_s_fmt,
676 
677 	.vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
678 	.vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
679 	.vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
680 	.vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
681 	.vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
682 	.vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
683 	.vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
684 
685 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
686 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
687 
688 	.vidioc_streamon = v4l2_m2m_ioctl_streamon,
689 	.vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
690 
691 	.vidioc_g_selection = vidioc_g_selection,
692 	.vidioc_s_selection = vidioc_s_selection,
693 };
694 
695 static const struct video_device rga_videodev = {
696 	.name = "rockchip-rga",
697 	.fops = &rga_fops,
698 	.ioctl_ops = &rga_ioctl_ops,
699 	.minor = -1,
700 	.release = video_device_release,
701 	.vfl_dir = VFL_DIR_M2M,
702 	.device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
703 };
704 
705 static int rga_enable_clocks(struct rockchip_rga *rga)
706 {
707 	int ret;
708 
709 	ret = clk_prepare_enable(rga->sclk);
710 	if (ret) {
711 		dev_err(rga->dev, "Cannot enable rga sclk: %d\n", ret);
712 		return ret;
713 	}
714 
715 	ret = clk_prepare_enable(rga->aclk);
716 	if (ret) {
717 		dev_err(rga->dev, "Cannot enable rga aclk: %d\n", ret);
718 		goto err_disable_sclk;
719 	}
720 
721 	ret = clk_prepare_enable(rga->hclk);
722 	if (ret) {
723 		dev_err(rga->dev, "Cannot enable rga hclk: %d\n", ret);
724 		goto err_disable_aclk;
725 	}
726 
727 	return 0;
728 
729 err_disable_sclk:
730 	clk_disable_unprepare(rga->sclk);
731 err_disable_aclk:
732 	clk_disable_unprepare(rga->aclk);
733 
734 	return ret;
735 }
736 
737 static void rga_disable_clocks(struct rockchip_rga *rga)
738 {
739 	clk_disable_unprepare(rga->sclk);
740 	clk_disable_unprepare(rga->hclk);
741 	clk_disable_unprepare(rga->aclk);
742 }
743 
744 static int rga_parse_dt(struct rockchip_rga *rga)
745 {
746 	struct reset_control *core_rst, *axi_rst, *ahb_rst;
747 
748 	core_rst = devm_reset_control_get(rga->dev, "core");
749 	if (IS_ERR(core_rst)) {
750 		dev_err(rga->dev, "failed to get core reset controller\n");
751 		return PTR_ERR(core_rst);
752 	}
753 
754 	axi_rst = devm_reset_control_get(rga->dev, "axi");
755 	if (IS_ERR(axi_rst)) {
756 		dev_err(rga->dev, "failed to get axi reset controller\n");
757 		return PTR_ERR(axi_rst);
758 	}
759 
760 	ahb_rst = devm_reset_control_get(rga->dev, "ahb");
761 	if (IS_ERR(ahb_rst)) {
762 		dev_err(rga->dev, "failed to get ahb reset controller\n");
763 		return PTR_ERR(ahb_rst);
764 	}
765 
766 	reset_control_assert(core_rst);
767 	udelay(1);
768 	reset_control_deassert(core_rst);
769 
770 	reset_control_assert(axi_rst);
771 	udelay(1);
772 	reset_control_deassert(axi_rst);
773 
774 	reset_control_assert(ahb_rst);
775 	udelay(1);
776 	reset_control_deassert(ahb_rst);
777 
778 	rga->sclk = devm_clk_get(rga->dev, "sclk");
779 	if (IS_ERR(rga->sclk)) {
780 		dev_err(rga->dev, "failed to get sclk clock\n");
781 		return PTR_ERR(rga->sclk);
782 	}
783 
784 	rga->aclk = devm_clk_get(rga->dev, "aclk");
785 	if (IS_ERR(rga->aclk)) {
786 		dev_err(rga->dev, "failed to get aclk clock\n");
787 		return PTR_ERR(rga->aclk);
788 	}
789 
790 	rga->hclk = devm_clk_get(rga->dev, "hclk");
791 	if (IS_ERR(rga->hclk)) {
792 		dev_err(rga->dev, "failed to get hclk clock\n");
793 		return PTR_ERR(rga->hclk);
794 	}
795 
796 	return 0;
797 }
798 
799 static int rga_probe(struct platform_device *pdev)
800 {
801 	struct rockchip_rga *rga;
802 	struct video_device *vfd;
803 	int ret = 0;
804 	int irq;
805 
806 	if (!pdev->dev.of_node)
807 		return -ENODEV;
808 
809 	rga = devm_kzalloc(&pdev->dev, sizeof(*rga), GFP_KERNEL);
810 	if (!rga)
811 		return -ENOMEM;
812 
813 	rga->dev = &pdev->dev;
814 	spin_lock_init(&rga->ctrl_lock);
815 	mutex_init(&rga->mutex);
816 
817 	ret = rga_parse_dt(rga);
818 	if (ret)
819 		dev_err(&pdev->dev, "Unable to parse OF data\n");
820 
821 	pm_runtime_enable(rga->dev);
822 
823 	rga->regs = devm_platform_ioremap_resource(pdev, 0);
824 	if (IS_ERR(rga->regs)) {
825 		ret = PTR_ERR(rga->regs);
826 		goto err_put_clk;
827 	}
828 
829 	irq = platform_get_irq(pdev, 0);
830 	if (irq < 0) {
831 		ret = irq;
832 		goto err_put_clk;
833 	}
834 
835 	ret = devm_request_irq(rga->dev, irq, rga_isr, 0,
836 			       dev_name(rga->dev), rga);
837 	if (ret < 0) {
838 		dev_err(rga->dev, "failed to request irq\n");
839 		goto err_put_clk;
840 	}
841 
842 	ret = v4l2_device_register(&pdev->dev, &rga->v4l2_dev);
843 	if (ret)
844 		goto err_put_clk;
845 	vfd = video_device_alloc();
846 	if (!vfd) {
847 		v4l2_err(&rga->v4l2_dev, "Failed to allocate video device\n");
848 		ret = -ENOMEM;
849 		goto unreg_v4l2_dev;
850 	}
851 	*vfd = rga_videodev;
852 	vfd->lock = &rga->mutex;
853 	vfd->v4l2_dev = &rga->v4l2_dev;
854 
855 	video_set_drvdata(vfd, rga);
856 	rga->vfd = vfd;
857 
858 	platform_set_drvdata(pdev, rga);
859 	rga->m2m_dev = v4l2_m2m_init(&rga_m2m_ops);
860 	if (IS_ERR(rga->m2m_dev)) {
861 		v4l2_err(&rga->v4l2_dev, "Failed to init mem2mem device\n");
862 		ret = PTR_ERR(rga->m2m_dev);
863 		goto rel_vdev;
864 	}
865 
866 	ret = pm_runtime_resume_and_get(rga->dev);
867 	if (ret < 0)
868 		goto rel_vdev;
869 
870 	rga->version.major = (rga_read(rga, RGA_VERSION_INFO) >> 24) & 0xFF;
871 	rga->version.minor = (rga_read(rga, RGA_VERSION_INFO) >> 20) & 0x0F;
872 
873 	v4l2_info(&rga->v4l2_dev, "HW Version: 0x%02x.%02x\n",
874 		  rga->version.major, rga->version.minor);
875 
876 	pm_runtime_put(rga->dev);
877 
878 	/* Create CMD buffer */
879 	rga->cmdbuf_virt = dma_alloc_attrs(rga->dev, RGA_CMDBUF_SIZE,
880 					   &rga->cmdbuf_phy, GFP_KERNEL,
881 					   DMA_ATTR_WRITE_COMBINE);
882 	if (!rga->cmdbuf_virt) {
883 		ret = -ENOMEM;
884 		goto rel_vdev;
885 	}
886 
887 	rga->src_mmu_pages =
888 		(unsigned int *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 3);
889 	if (!rga->src_mmu_pages) {
890 		ret = -ENOMEM;
891 		goto free_dma;
892 	}
893 	rga->dst_mmu_pages =
894 		(unsigned int *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 3);
895 	if (rga->dst_mmu_pages) {
896 		ret = -ENOMEM;
897 		goto free_src_pages;
898 	}
899 
900 	def_frame.stride = (def_frame.width * def_frame.fmt->depth) >> 3;
901 	def_frame.size = def_frame.stride * def_frame.height;
902 
903 	ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
904 	if (ret) {
905 		v4l2_err(&rga->v4l2_dev, "Failed to register video device\n");
906 		goto free_dst_pages;
907 	}
908 
909 	v4l2_info(&rga->v4l2_dev, "Registered %s as /dev/%s\n",
910 		  vfd->name, video_device_node_name(vfd));
911 
912 	return 0;
913 
914 free_dst_pages:
915 	free_pages((unsigned long)rga->dst_mmu_pages, 3);
916 free_src_pages:
917 	free_pages((unsigned long)rga->src_mmu_pages, 3);
918 free_dma:
919 	dma_free_attrs(rga->dev, RGA_CMDBUF_SIZE, rga->cmdbuf_virt,
920 		       rga->cmdbuf_phy, DMA_ATTR_WRITE_COMBINE);
921 rel_vdev:
922 	video_device_release(vfd);
923 unreg_v4l2_dev:
924 	v4l2_device_unregister(&rga->v4l2_dev);
925 err_put_clk:
926 	pm_runtime_disable(rga->dev);
927 
928 	return ret;
929 }
930 
931 static int rga_remove(struct platform_device *pdev)
932 {
933 	struct rockchip_rga *rga = platform_get_drvdata(pdev);
934 
935 	dma_free_attrs(rga->dev, RGA_CMDBUF_SIZE, rga->cmdbuf_virt,
936 		       rga->cmdbuf_phy, DMA_ATTR_WRITE_COMBINE);
937 
938 	free_pages((unsigned long)rga->src_mmu_pages, 3);
939 	free_pages((unsigned long)rga->dst_mmu_pages, 3);
940 
941 	v4l2_info(&rga->v4l2_dev, "Removing\n");
942 
943 	v4l2_m2m_release(rga->m2m_dev);
944 	video_unregister_device(rga->vfd);
945 	v4l2_device_unregister(&rga->v4l2_dev);
946 
947 	pm_runtime_disable(rga->dev);
948 
949 	return 0;
950 }
951 
952 static int __maybe_unused rga_runtime_suspend(struct device *dev)
953 {
954 	struct rockchip_rga *rga = dev_get_drvdata(dev);
955 
956 	rga_disable_clocks(rga);
957 
958 	return 0;
959 }
960 
961 static int __maybe_unused rga_runtime_resume(struct device *dev)
962 {
963 	struct rockchip_rga *rga = dev_get_drvdata(dev);
964 
965 	return rga_enable_clocks(rga);
966 }
967 
968 static const struct dev_pm_ops rga_pm = {
969 	SET_RUNTIME_PM_OPS(rga_runtime_suspend,
970 			   rga_runtime_resume, NULL)
971 };
972 
973 static const struct of_device_id rockchip_rga_match[] = {
974 	{
975 		.compatible = "rockchip,rk3288-rga",
976 	},
977 	{
978 		.compatible = "rockchip,rk3399-rga",
979 	},
980 	{},
981 };
982 
983 MODULE_DEVICE_TABLE(of, rockchip_rga_match);
984 
985 static struct platform_driver rga_pdrv = {
986 	.probe = rga_probe,
987 	.remove = rga_remove,
988 	.driver = {
989 		.name = RGA_NAME,
990 		.pm = &rga_pm,
991 		.of_match_table = rockchip_rga_match,
992 	},
993 };
994 
995 module_platform_driver(rga_pdrv);
996 
997 MODULE_AUTHOR("Jacob Chen <jacob-chen@iotwrt.com>");
998 MODULE_DESCRIPTION("Rockchip Raster 2d Graphic Acceleration Unit");
999 MODULE_LICENSE("GPL");
1000