xref: /openbmc/linux/drivers/media/platform/renesas/sh_vou.c (revision c900529f3d9161bfde5cca0754f83b4d3c3e0220)
1  // SPDX-License-Identifier: GPL-2.0
2  /*
3   * SuperH Video Output Unit (VOU) driver
4   *
5   * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
6   */
7  
8  #include <linux/dma-mapping.h>
9  #include <linux/delay.h>
10  #include <linux/errno.h>
11  #include <linux/fs.h>
12  #include <linux/i2c.h>
13  #include <linux/init.h>
14  #include <linux/interrupt.h>
15  #include <linux/kernel.h>
16  #include <linux/platform_device.h>
17  #include <linux/pm_runtime.h>
18  #include <linux/slab.h>
19  #include <linux/videodev2.h>
20  #include <linux/module.h>
21  
22  #include <media/drv-intf/sh_vou.h>
23  #include <media/v4l2-common.h>
24  #include <media/v4l2-device.h>
25  #include <media/v4l2-ioctl.h>
26  #include <media/v4l2-mediabus.h>
27  #include <media/videobuf2-v4l2.h>
28  #include <media/videobuf2-dma-contig.h>
29  
30  /* Mirror addresses are not available for all registers */
31  #define VOUER	0
32  #define VOUCR	4
33  #define VOUSTR	8
34  #define VOUVCR	0xc
35  #define VOUISR	0x10
36  #define VOUBCR	0x14
37  #define VOUDPR	0x18
38  #define VOUDSR	0x1c
39  #define VOUVPR	0x20
40  #define VOUIR	0x24
41  #define VOUSRR	0x28
42  #define VOUMSR	0x2c
43  #define VOUHIR	0x30
44  #define VOUDFR	0x34
45  #define VOUAD1R	0x38
46  #define VOUAD2R	0x3c
47  #define VOUAIR	0x40
48  #define VOUSWR	0x44
49  #define VOURCR	0x48
50  #define VOURPR	0x50
51  
52  enum sh_vou_status {
53  	SH_VOU_IDLE,
54  	SH_VOU_INITIALISING,
55  	SH_VOU_RUNNING,
56  };
57  
58  #define VOU_MIN_IMAGE_WIDTH	16
59  #define VOU_MAX_IMAGE_WIDTH	720
60  #define VOU_MIN_IMAGE_HEIGHT	16
61  
62  struct sh_vou_buffer {
63  	struct vb2_v4l2_buffer vb;
64  	struct list_head list;
65  };
66  
67  static inline struct
to_sh_vou_buffer(struct vb2_v4l2_buffer * vb2)68  sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
69  {
70  	return container_of(vb2, struct sh_vou_buffer, vb);
71  }
72  
73  struct sh_vou_device {
74  	struct v4l2_device v4l2_dev;
75  	struct video_device vdev;
76  	struct sh_vou_pdata *pdata;
77  	spinlock_t lock;
78  	void __iomem *base;
79  	/* State information */
80  	struct v4l2_pix_format pix;
81  	struct v4l2_rect rect;
82  	struct list_head buf_list;
83  	v4l2_std_id std;
84  	int pix_idx;
85  	struct vb2_queue queue;
86  	struct sh_vou_buffer *active;
87  	enum sh_vou_status status;
88  	unsigned sequence;
89  	struct mutex fop_lock;
90  };
91  
92  /* Register access routines for sides A, B and mirror addresses */
sh_vou_reg_a_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)93  static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
94  			       u32 value)
95  {
96  	__raw_writel(value, vou_dev->base + reg);
97  }
98  
sh_vou_reg_ab_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)99  static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
100  				u32 value)
101  {
102  	__raw_writel(value, vou_dev->base + reg);
103  	__raw_writel(value, vou_dev->base + reg + 0x1000);
104  }
105  
sh_vou_reg_m_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)106  static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
107  			       u32 value)
108  {
109  	__raw_writel(value, vou_dev->base + reg + 0x2000);
110  }
111  
sh_vou_reg_a_read(struct sh_vou_device * vou_dev,unsigned int reg)112  static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
113  {
114  	return __raw_readl(vou_dev->base + reg);
115  }
116  
sh_vou_reg_a_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)117  static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
118  			     u32 value, u32 mask)
119  {
120  	u32 old = __raw_readl(vou_dev->base + reg);
121  
122  	value = (value & mask) | (old & ~mask);
123  	__raw_writel(value, vou_dev->base + reg);
124  }
125  
sh_vou_reg_b_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)126  static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
127  			     u32 value, u32 mask)
128  {
129  	sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
130  }
131  
sh_vou_reg_ab_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)132  static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
133  			      u32 value, u32 mask)
134  {
135  	sh_vou_reg_a_set(vou_dev, reg, value, mask);
136  	sh_vou_reg_b_set(vou_dev, reg, value, mask);
137  }
138  
139  struct sh_vou_fmt {
140  	u32		pfmt;
141  	unsigned char	bpp;
142  	unsigned char	bpl;
143  	unsigned char	rgb;
144  	unsigned char	yf;
145  	unsigned char	pkf;
146  };
147  
148  /* Further pixel formats can be added */
149  static struct sh_vou_fmt vou_fmt[] = {
150  	{
151  		.pfmt	= V4L2_PIX_FMT_NV12,
152  		.bpp	= 12,
153  		.bpl	= 1,
154  		.yf	= 0,
155  		.rgb	= 0,
156  	},
157  	{
158  		.pfmt	= V4L2_PIX_FMT_NV16,
159  		.bpp	= 16,
160  		.bpl	= 1,
161  		.yf	= 1,
162  		.rgb	= 0,
163  	},
164  	{
165  		.pfmt	= V4L2_PIX_FMT_RGB24,
166  		.bpp	= 24,
167  		.bpl	= 3,
168  		.pkf	= 2,
169  		.rgb	= 1,
170  	},
171  	{
172  		.pfmt	= V4L2_PIX_FMT_RGB565,
173  		.bpp	= 16,
174  		.bpl	= 2,
175  		.pkf	= 3,
176  		.rgb	= 1,
177  	},
178  	{
179  		.pfmt	= V4L2_PIX_FMT_RGB565X,
180  		.bpp	= 16,
181  		.bpl	= 2,
182  		.pkf	= 3,
183  		.rgb	= 1,
184  	},
185  };
186  
sh_vou_schedule_next(struct sh_vou_device * vou_dev,struct vb2_v4l2_buffer * vbuf)187  static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
188  				 struct vb2_v4l2_buffer *vbuf)
189  {
190  	dma_addr_t addr1, addr2;
191  
192  	addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
193  	switch (vou_dev->pix.pixelformat) {
194  	case V4L2_PIX_FMT_NV12:
195  	case V4L2_PIX_FMT_NV16:
196  		addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
197  		break;
198  	default:
199  		addr2 = 0;
200  	}
201  
202  	sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
203  	sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
204  }
205  
sh_vou_stream_config(struct sh_vou_device * vou_dev)206  static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
207  {
208  	unsigned int row_coeff;
209  #ifdef __LITTLE_ENDIAN
210  	u32 dataswap = 7;
211  #else
212  	u32 dataswap = 0;
213  #endif
214  
215  	switch (vou_dev->pix.pixelformat) {
216  	default:
217  	case V4L2_PIX_FMT_NV12:
218  	case V4L2_PIX_FMT_NV16:
219  		row_coeff = 1;
220  		break;
221  	case V4L2_PIX_FMT_RGB565:
222  		dataswap ^= 1;
223  		fallthrough;
224  	case V4L2_PIX_FMT_RGB565X:
225  		row_coeff = 2;
226  		break;
227  	case V4L2_PIX_FMT_RGB24:
228  		row_coeff = 3;
229  		break;
230  	}
231  
232  	sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
233  	sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
234  }
235  
236  /* Locking: caller holds fop_lock mutex */
sh_vou_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])237  static int sh_vou_queue_setup(struct vb2_queue *vq,
238  		       unsigned int *nbuffers, unsigned int *nplanes,
239  		       unsigned int sizes[], struct device *alloc_devs[])
240  {
241  	struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
242  	struct v4l2_pix_format *pix = &vou_dev->pix;
243  	int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
244  
245  	dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
246  
247  	if (*nplanes)
248  		return sizes[0] < pix->height * bytes_per_line ? -EINVAL : 0;
249  	*nplanes = 1;
250  	sizes[0] = pix->height * bytes_per_line;
251  	return 0;
252  }
253  
sh_vou_buf_prepare(struct vb2_buffer * vb)254  static int sh_vou_buf_prepare(struct vb2_buffer *vb)
255  {
256  	struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
257  	struct v4l2_pix_format *pix = &vou_dev->pix;
258  	unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
259  	unsigned size = pix->height * bytes_per_line;
260  
261  	dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
262  
263  	if (vb2_plane_size(vb, 0) < size) {
264  		/* User buffer too small */
265  		dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
266  			 vb2_plane_size(vb, 0), size);
267  		return -EINVAL;
268  	}
269  
270  	vb2_set_plane_payload(vb, 0, size);
271  	return 0;
272  }
273  
274  /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
sh_vou_buf_queue(struct vb2_buffer * vb)275  static void sh_vou_buf_queue(struct vb2_buffer *vb)
276  {
277  	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
278  	struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
279  	struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
280  	unsigned long flags;
281  
282  	spin_lock_irqsave(&vou_dev->lock, flags);
283  	list_add_tail(&shbuf->list, &vou_dev->buf_list);
284  	spin_unlock_irqrestore(&vou_dev->lock, flags);
285  }
286  
sh_vou_start_streaming(struct vb2_queue * vq,unsigned int count)287  static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
288  {
289  	struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
290  	struct sh_vou_buffer *buf, *node;
291  	int ret;
292  
293  	vou_dev->sequence = 0;
294  	ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
295  					 video, s_stream, 1);
296  	if (ret < 0 && ret != -ENOIOCTLCMD) {
297  		list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
298  			vb2_buffer_done(&buf->vb.vb2_buf,
299  					VB2_BUF_STATE_QUEUED);
300  			list_del(&buf->list);
301  		}
302  		vou_dev->active = NULL;
303  		return ret;
304  	}
305  
306  	buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
307  
308  	vou_dev->active = buf;
309  
310  	/* Start from side A: we use mirror addresses, so, set B */
311  	sh_vou_reg_a_write(vou_dev, VOURPR, 1);
312  	dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
313  		__func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
314  	sh_vou_schedule_next(vou_dev, &buf->vb);
315  
316  	buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
317  
318  	/* Second buffer - initialise register side B */
319  	sh_vou_reg_a_write(vou_dev, VOURPR, 0);
320  	sh_vou_schedule_next(vou_dev, &buf->vb);
321  
322  	/* Register side switching with frame VSYNC */
323  	sh_vou_reg_a_write(vou_dev, VOURCR, 5);
324  
325  	sh_vou_stream_config(vou_dev);
326  	/* Enable End-of-Frame (VSYNC) interrupts */
327  	sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
328  
329  	/* Two buffers on the queue - activate the hardware */
330  	vou_dev->status = SH_VOU_RUNNING;
331  	sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
332  	return 0;
333  }
334  
sh_vou_stop_streaming(struct vb2_queue * vq)335  static void sh_vou_stop_streaming(struct vb2_queue *vq)
336  {
337  	struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
338  	struct sh_vou_buffer *buf, *node;
339  	unsigned long flags;
340  
341  	v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
342  					 video, s_stream, 0);
343  	/* disable output */
344  	sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
345  	/* ...but the current frame will complete */
346  	sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
347  	msleep(50);
348  	spin_lock_irqsave(&vou_dev->lock, flags);
349  	list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
350  		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
351  		list_del(&buf->list);
352  	}
353  	vou_dev->active = NULL;
354  	spin_unlock_irqrestore(&vou_dev->lock, flags);
355  }
356  
357  static const struct vb2_ops sh_vou_qops = {
358  	.queue_setup		= sh_vou_queue_setup,
359  	.buf_prepare		= sh_vou_buf_prepare,
360  	.buf_queue		= sh_vou_buf_queue,
361  	.start_streaming	= sh_vou_start_streaming,
362  	.stop_streaming		= sh_vou_stop_streaming,
363  	.wait_prepare		= vb2_ops_wait_prepare,
364  	.wait_finish		= vb2_ops_wait_finish,
365  };
366  
367  /* Video IOCTLs */
sh_vou_querycap(struct file * file,void * priv,struct v4l2_capability * cap)368  static int sh_vou_querycap(struct file *file, void  *priv,
369  			   struct v4l2_capability *cap)
370  {
371  	struct sh_vou_device *vou_dev = video_drvdata(file);
372  
373  	dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
374  
375  	strscpy(cap->card, "SuperH VOU", sizeof(cap->card));
376  	strscpy(cap->driver, "sh-vou", sizeof(cap->driver));
377  	strscpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
378  	return 0;
379  }
380  
381  /* Enumerate formats, that the device can accept from the user */
sh_vou_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * fmt)382  static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
383  				   struct v4l2_fmtdesc *fmt)
384  {
385  	struct sh_vou_device *vou_dev = video_drvdata(file);
386  
387  	if (fmt->index >= ARRAY_SIZE(vou_fmt))
388  		return -EINVAL;
389  
390  	dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
391  
392  	fmt->pixelformat = vou_fmt[fmt->index].pfmt;
393  
394  	return 0;
395  }
396  
sh_vou_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)397  static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
398  				struct v4l2_format *fmt)
399  {
400  	struct sh_vou_device *vou_dev = video_drvdata(file);
401  
402  	dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
403  
404  	fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
405  	fmt->fmt.pix = vou_dev->pix;
406  
407  	return 0;
408  }
409  
410  static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
411  static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
412  static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
413  static const unsigned char vou_scale_v_num[] = {1, 2, 4};
414  static const unsigned char vou_scale_v_den[] = {1, 1, 1};
415  static const unsigned char vou_scale_v_fld[] = {0, 1};
416  
sh_vou_configure_geometry(struct sh_vou_device * vou_dev,int pix_idx,int w_idx,int h_idx)417  static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
418  				      int pix_idx, int w_idx, int h_idx)
419  {
420  	struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
421  	unsigned int black_left, black_top, width_max,
422  		frame_in_height, frame_out_height, frame_out_top;
423  	struct v4l2_rect *rect = &vou_dev->rect;
424  	struct v4l2_pix_format *pix = &vou_dev->pix;
425  	u32 vouvcr = 0, dsr_h, dsr_v;
426  
427  	if (vou_dev->std & V4L2_STD_525_60) {
428  		width_max = 858;
429  		/* height_max = 262; */
430  	} else {
431  		width_max = 864;
432  		/* height_max = 312; */
433  	}
434  
435  	frame_in_height = pix->height / 2;
436  	frame_out_height = rect->height / 2;
437  	frame_out_top = rect->top / 2;
438  
439  	/*
440  	 * Cropping scheme: max useful image is 720x480, and the total video
441  	 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
442  	 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
443  	 * of which the first 33 / 25 clocks HSYNC must be held active. This
444  	 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
445  	 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
446  	 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
447  	 * beyond DSR, specified on the left and top by the VPR register "black
448  	 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
449  	 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
450  	 * client requires, and that's exactly what leaves us 720 pixels for the
451  	 * image; we leave VPR[VVP] at default 20 for now, because the client
452  	 * doesn't seem to have any special requirements for it. Otherwise we
453  	 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
454  	 * the selected standard, and DPR and DSR are selected according to
455  	 * cropping. Q: how does the client detect the first valid line? Does
456  	 * HSYNC stay inactive during invalid (black) lines?
457  	 */
458  	black_left = width_max - VOU_MAX_IMAGE_WIDTH;
459  	black_top = 20;
460  
461  	dsr_h = rect->width + rect->left;
462  	dsr_v = frame_out_height + frame_out_top;
463  
464  	dev_dbg(vou_dev->v4l2_dev.dev,
465  		"image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
466  		pix->width, frame_in_height, black_left, black_top,
467  		rect->left, frame_out_top, dsr_h, dsr_v);
468  
469  	/* VOUISR height - half of a frame height in frame mode */
470  	sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
471  	sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
472  	sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
473  	sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
474  
475  	/*
476  	 * if necessary, we could set VOUHIR to
477  	 * max(black_left + dsr_h, width_max) here
478  	 */
479  
480  	if (w_idx)
481  		vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
482  	if (h_idx)
483  		vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
484  
485  	dev_dbg(vou_dev->v4l2_dev.dev, "0x%08x: scaling 0x%x\n",
486  		fmt->pfmt, vouvcr);
487  
488  	/* To produce a colour bar for testing set bit 23 of VOUVCR */
489  	sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
490  	sh_vou_reg_ab_write(vou_dev, VOUDFR,
491  			    fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
492  }
493  
494  struct sh_vou_geometry {
495  	struct v4l2_rect output;
496  	unsigned int in_width;
497  	unsigned int in_height;
498  	int scale_idx_h;
499  	int scale_idx_v;
500  };
501  
502  /*
503   * Find input geometry, that we can use to produce output, closest to the
504   * requested rectangle, using VOU scaling
505   */
vou_adjust_input(struct sh_vou_geometry * geo,v4l2_std_id std)506  static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
507  {
508  	/* The compiler cannot know, that best and idx will indeed be set */
509  	unsigned int best_err = UINT_MAX, best = 0, img_height_max;
510  	int i, idx = 0;
511  
512  	if (std & V4L2_STD_525_60)
513  		img_height_max = 480;
514  	else
515  		img_height_max = 576;
516  
517  	/* Image width must be a multiple of 4 */
518  	v4l_bound_align_image(&geo->in_width,
519  			      VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
520  			      &geo->in_height,
521  			      VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
522  
523  	/* Select scales to come as close as possible to the output image */
524  	for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
525  		unsigned int err;
526  		unsigned int found = geo->output.width * vou_scale_h_den[i] /
527  			vou_scale_h_num[i];
528  
529  		if (found > VOU_MAX_IMAGE_WIDTH)
530  			/* scales increase */
531  			break;
532  
533  		err = abs(found - geo->in_width);
534  		if (err < best_err) {
535  			best_err = err;
536  			idx = i;
537  			best = found;
538  		}
539  		if (!err)
540  			break;
541  	}
542  
543  	geo->in_width = best;
544  	geo->scale_idx_h = idx;
545  
546  	best_err = UINT_MAX;
547  
548  	/* This loop can be replaced with one division */
549  	for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
550  		unsigned int err;
551  		unsigned int found = geo->output.height * vou_scale_v_den[i] /
552  			vou_scale_v_num[i];
553  
554  		if (found > img_height_max)
555  			/* scales increase */
556  			break;
557  
558  		err = abs(found - geo->in_height);
559  		if (err < best_err) {
560  			best_err = err;
561  			idx = i;
562  			best = found;
563  		}
564  		if (!err)
565  			break;
566  	}
567  
568  	geo->in_height = best;
569  	geo->scale_idx_v = idx;
570  }
571  
572  /*
573   * Find output geometry, that we can produce, using VOU scaling, closest to
574   * the requested rectangle
575   */
vou_adjust_output(struct sh_vou_geometry * geo,v4l2_std_id std)576  static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
577  {
578  	unsigned int best_err = UINT_MAX, best = geo->in_width,
579  		width_max, height_max, img_height_max;
580  	int i, idx_h = 0, idx_v = 0;
581  
582  	if (std & V4L2_STD_525_60) {
583  		width_max = 858;
584  		height_max = 262 * 2;
585  		img_height_max = 480;
586  	} else {
587  		width_max = 864;
588  		height_max = 312 * 2;
589  		img_height_max = 576;
590  	}
591  
592  	/* Select scales to come as close as possible to the output image */
593  	for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
594  		unsigned int err;
595  		unsigned int found = geo->in_width * vou_scale_h_num[i] /
596  			vou_scale_h_den[i];
597  
598  		if (found > VOU_MAX_IMAGE_WIDTH)
599  			/* scales increase */
600  			break;
601  
602  		err = abs(found - geo->output.width);
603  		if (err < best_err) {
604  			best_err = err;
605  			idx_h = i;
606  			best = found;
607  		}
608  		if (!err)
609  			break;
610  	}
611  
612  	geo->output.width = best;
613  	geo->scale_idx_h = idx_h;
614  	if (geo->output.left + best > width_max)
615  		geo->output.left = width_max - best;
616  
617  	pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
618  		 vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
619  
620  	best_err = UINT_MAX;
621  
622  	/* This loop can be replaced with one division */
623  	for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
624  		unsigned int err;
625  		unsigned int found = geo->in_height * vou_scale_v_num[i] /
626  			vou_scale_v_den[i];
627  
628  		if (found > img_height_max)
629  			/* scales increase */
630  			break;
631  
632  		err = abs(found - geo->output.height);
633  		if (err < best_err) {
634  			best_err = err;
635  			idx_v = i;
636  			best = found;
637  		}
638  		if (!err)
639  			break;
640  	}
641  
642  	geo->output.height = best;
643  	geo->scale_idx_v = idx_v;
644  	if (geo->output.top + best > height_max)
645  		geo->output.top = height_max - best;
646  
647  	pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
648  		 vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
649  }
650  
sh_vou_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)651  static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
652  				  struct v4l2_format *fmt)
653  {
654  	struct sh_vou_device *vou_dev = video_drvdata(file);
655  	struct v4l2_pix_format *pix = &fmt->fmt.pix;
656  	unsigned int img_height_max;
657  	int pix_idx;
658  
659  	dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
660  
661  	pix->field = V4L2_FIELD_INTERLACED;
662  	pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
663  	pix->ycbcr_enc = pix->quantization = 0;
664  
665  	for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
666  		if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
667  			break;
668  
669  	if (pix_idx == ARRAY_SIZE(vou_fmt))
670  		return -EINVAL;
671  
672  	if (vou_dev->std & V4L2_STD_525_60)
673  		img_height_max = 480;
674  	else
675  		img_height_max = 576;
676  
677  	v4l_bound_align_image(&pix->width,
678  			      VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
679  			      &pix->height,
680  			      VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
681  	pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
682  	pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
683  
684  	return 0;
685  }
686  
sh_vou_set_fmt_vid_out(struct sh_vou_device * vou_dev,struct v4l2_pix_format * pix)687  static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
688  				struct v4l2_pix_format *pix)
689  {
690  	unsigned int img_height_max;
691  	struct sh_vou_geometry geo;
692  	struct v4l2_subdev_format format = {
693  		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
694  		/* Revisit: is this the correct code? */
695  		.format.code = MEDIA_BUS_FMT_YUYV8_2X8,
696  		.format.field = V4L2_FIELD_INTERLACED,
697  		.format.colorspace = V4L2_COLORSPACE_SMPTE170M,
698  	};
699  	struct v4l2_mbus_framefmt *mbfmt = &format.format;
700  	int pix_idx;
701  	int ret;
702  
703  	if (vb2_is_busy(&vou_dev->queue))
704  		return -EBUSY;
705  
706  	for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
707  		if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
708  			break;
709  
710  	geo.in_width = pix->width;
711  	geo.in_height = pix->height;
712  	geo.output = vou_dev->rect;
713  
714  	vou_adjust_output(&geo, vou_dev->std);
715  
716  	mbfmt->width = geo.output.width;
717  	mbfmt->height = geo.output.height;
718  	ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
719  					 set_fmt, NULL, &format);
720  	/* Must be implemented, so, don't check for -ENOIOCTLCMD */
721  	if (ret < 0)
722  		return ret;
723  
724  	dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
725  		geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
726  
727  	if (vou_dev->std & V4L2_STD_525_60)
728  		img_height_max = 480;
729  	else
730  		img_height_max = 576;
731  
732  	/* Sanity checks */
733  	if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
734  	    (unsigned)mbfmt->height > img_height_max ||
735  	    mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
736  		return -EIO;
737  
738  	if (mbfmt->width != geo.output.width ||
739  	    mbfmt->height != geo.output.height) {
740  		geo.output.width = mbfmt->width;
741  		geo.output.height = mbfmt->height;
742  
743  		vou_adjust_input(&geo, vou_dev->std);
744  	}
745  
746  	/* We tried to preserve output rectangle, but it could have changed */
747  	vou_dev->rect = geo.output;
748  	pix->width = geo.in_width;
749  	pix->height = geo.in_height;
750  
751  	dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
752  		pix->width, pix->height);
753  
754  	vou_dev->pix_idx = pix_idx;
755  
756  	vou_dev->pix = *pix;
757  
758  	sh_vou_configure_geometry(vou_dev, pix_idx,
759  				  geo.scale_idx_h, geo.scale_idx_v);
760  
761  	return 0;
762  }
763  
sh_vou_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)764  static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
765  				struct v4l2_format *fmt)
766  {
767  	struct sh_vou_device *vou_dev = video_drvdata(file);
768  	int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
769  
770  	if (ret)
771  		return ret;
772  	return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
773  }
774  
sh_vou_enum_output(struct file * file,void * fh,struct v4l2_output * a)775  static int sh_vou_enum_output(struct file *file, void *fh,
776  			      struct v4l2_output *a)
777  {
778  	struct sh_vou_device *vou_dev = video_drvdata(file);
779  
780  	if (a->index)
781  		return -EINVAL;
782  	strscpy(a->name, "Video Out", sizeof(a->name));
783  	a->type = V4L2_OUTPUT_TYPE_ANALOG;
784  	a->std = vou_dev->vdev.tvnorms;
785  	return 0;
786  }
787  
sh_vou_g_output(struct file * file,void * fh,unsigned int * i)788  static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
789  {
790  	*i = 0;
791  	return 0;
792  }
793  
sh_vou_s_output(struct file * file,void * fh,unsigned int i)794  static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
795  {
796  	return i ? -EINVAL : 0;
797  }
798  
sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)799  static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
800  {
801  	switch (bus_fmt) {
802  	default:
803  		pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
804  			__func__, bus_fmt);
805  		fallthrough;
806  	case SH_VOU_BUS_8BIT:
807  		return 1;
808  	case SH_VOU_BUS_16BIT:
809  		return 0;
810  	case SH_VOU_BUS_BT656:
811  		return 3;
812  	}
813  }
814  
sh_vou_s_std(struct file * file,void * priv,v4l2_std_id std_id)815  static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
816  {
817  	struct sh_vou_device *vou_dev = video_drvdata(file);
818  	int ret;
819  
820  	dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
821  
822  	if (std_id == vou_dev->std)
823  		return 0;
824  
825  	if (vb2_is_busy(&vou_dev->queue))
826  		return -EBUSY;
827  
828  	ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
829  					 s_std_output, std_id);
830  	/* Shall we continue, if the subdev doesn't support .s_std_output()? */
831  	if (ret < 0 && ret != -ENOIOCTLCMD)
832  		return ret;
833  
834  	vou_dev->rect.top = vou_dev->rect.left = 0;
835  	vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
836  	if (std_id & V4L2_STD_525_60) {
837  		sh_vou_reg_ab_set(vou_dev, VOUCR,
838  			sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
839  		vou_dev->rect.height = 480;
840  	} else {
841  		sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
842  		vou_dev->rect.height = 576;
843  	}
844  
845  	vou_dev->pix.width = vou_dev->rect.width;
846  	vou_dev->pix.height = vou_dev->rect.height;
847  	vou_dev->pix.bytesperline =
848  		vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
849  	vou_dev->pix.sizeimage = vou_dev->pix.height *
850  		((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
851  	vou_dev->std = std_id;
852  	sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
853  
854  	return 0;
855  }
856  
sh_vou_g_std(struct file * file,void * priv,v4l2_std_id * std)857  static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
858  {
859  	struct sh_vou_device *vou_dev = video_drvdata(file);
860  
861  	dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
862  
863  	*std = vou_dev->std;
864  
865  	return 0;
866  }
867  
sh_vou_log_status(struct file * file,void * priv)868  static int sh_vou_log_status(struct file *file, void *priv)
869  {
870  	struct sh_vou_device *vou_dev = video_drvdata(file);
871  
872  	pr_info("VOUER:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
873  	pr_info("VOUCR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
874  	pr_info("VOUSTR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
875  	pr_info("VOUVCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
876  	pr_info("VOUISR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
877  	pr_info("VOUBCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
878  	pr_info("VOUDPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
879  	pr_info("VOUDSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
880  	pr_info("VOUVPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
881  	pr_info("VOUIR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
882  	pr_info("VOUSRR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
883  	pr_info("VOUMSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
884  	pr_info("VOUHIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
885  	pr_info("VOUDFR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
886  	pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
887  	pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
888  	pr_info("VOUAIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
889  	pr_info("VOUSWR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
890  	pr_info("VOURCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
891  	pr_info("VOURPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
892  	return 0;
893  }
894  
sh_vou_g_selection(struct file * file,void * fh,struct v4l2_selection * sel)895  static int sh_vou_g_selection(struct file *file, void *fh,
896  			      struct v4l2_selection *sel)
897  {
898  	struct sh_vou_device *vou_dev = video_drvdata(file);
899  
900  	if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
901  		return -EINVAL;
902  	switch (sel->target) {
903  	case V4L2_SEL_TGT_COMPOSE:
904  		sel->r = vou_dev->rect;
905  		break;
906  	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
907  	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
908  		sel->r.left = 0;
909  		sel->r.top = 0;
910  		sel->r.width = VOU_MAX_IMAGE_WIDTH;
911  		if (vou_dev->std & V4L2_STD_525_60)
912  			sel->r.height = 480;
913  		else
914  			sel->r.height = 576;
915  		break;
916  	default:
917  		return -EINVAL;
918  	}
919  	return 0;
920  }
921  
922  /* Assume a dull encoder, do all the work ourselves. */
sh_vou_s_selection(struct file * file,void * fh,struct v4l2_selection * sel)923  static int sh_vou_s_selection(struct file *file, void *fh,
924  			      struct v4l2_selection *sel)
925  {
926  	struct v4l2_rect *rect = &sel->r;
927  	struct sh_vou_device *vou_dev = video_drvdata(file);
928  	struct v4l2_subdev_selection sd_sel = {
929  		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
930  		.target = V4L2_SEL_TGT_COMPOSE,
931  	};
932  	struct v4l2_pix_format *pix = &vou_dev->pix;
933  	struct sh_vou_geometry geo;
934  	struct v4l2_subdev_format format = {
935  		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
936  		/* Revisit: is this the correct code? */
937  		.format.code = MEDIA_BUS_FMT_YUYV8_2X8,
938  		.format.field = V4L2_FIELD_INTERLACED,
939  		.format.colorspace = V4L2_COLORSPACE_SMPTE170M,
940  	};
941  	unsigned int img_height_max;
942  	int ret;
943  
944  	if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
945  	    sel->target != V4L2_SEL_TGT_COMPOSE)
946  		return -EINVAL;
947  
948  	if (vb2_is_busy(&vou_dev->queue))
949  		return -EBUSY;
950  
951  	if (vou_dev->std & V4L2_STD_525_60)
952  		img_height_max = 480;
953  	else
954  		img_height_max = 576;
955  
956  	v4l_bound_align_image(&rect->width,
957  			      VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
958  			      &rect->height,
959  			      VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
960  
961  	if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
962  		rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
963  
964  	if (rect->height + rect->top > img_height_max)
965  		rect->top = img_height_max - rect->height;
966  
967  	geo.output = *rect;
968  	geo.in_width = pix->width;
969  	geo.in_height = pix->height;
970  
971  	/* Configure the encoder one-to-one, position at 0, ignore errors */
972  	sd_sel.r.width = geo.output.width;
973  	sd_sel.r.height = geo.output.height;
974  	/*
975  	 * We first issue a S_SELECTION, so that the subsequent S_FMT delivers the
976  	 * final encoder configuration.
977  	 */
978  	v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
979  				   set_selection, NULL, &sd_sel);
980  	format.format.width = geo.output.width;
981  	format.format.height = geo.output.height;
982  	ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
983  					 set_fmt, NULL, &format);
984  	/* Must be implemented, so, don't check for -ENOIOCTLCMD */
985  	if (ret < 0)
986  		return ret;
987  
988  	/* Sanity checks */
989  	if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
990  	    (unsigned)format.format.height > img_height_max ||
991  	    format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
992  		return -EIO;
993  
994  	geo.output.width = format.format.width;
995  	geo.output.height = format.format.height;
996  
997  	/*
998  	 * No down-scaling. According to the API, current call has precedence:
999  	 * https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/crop.html#cropping-structures
1000  	 */
1001  	vou_adjust_input(&geo, vou_dev->std);
1002  
1003  	/* We tried to preserve output rectangle, but it could have changed */
1004  	vou_dev->rect = geo.output;
1005  	pix->width = geo.in_width;
1006  	pix->height = geo.in_height;
1007  
1008  	sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1009  				  geo.scale_idx_h, geo.scale_idx_v);
1010  
1011  	return 0;
1012  }
1013  
sh_vou_isr(int irq,void * dev_id)1014  static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1015  {
1016  	struct sh_vou_device *vou_dev = dev_id;
1017  	static unsigned long j;
1018  	struct sh_vou_buffer *vb;
1019  	static int cnt;
1020  	u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1021  	u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1022  
1023  	if (!(irq_status & 0x300)) {
1024  		if (printk_timed_ratelimit(&j, 500))
1025  			dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1026  				 irq_status);
1027  		return IRQ_NONE;
1028  	}
1029  
1030  	spin_lock(&vou_dev->lock);
1031  	if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1032  		if (printk_timed_ratelimit(&j, 500))
1033  			dev_warn(vou_dev->v4l2_dev.dev,
1034  				 "IRQ without active buffer: %x!\n", irq_status);
1035  		/* Just ack: buf_release will disable further interrupts */
1036  		sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1037  		spin_unlock(&vou_dev->lock);
1038  		return IRQ_HANDLED;
1039  	}
1040  
1041  	masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1042  	dev_dbg(vou_dev->v4l2_dev.dev,
1043  		"IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1044  		irq_status, masked, vou_status, cnt);
1045  
1046  	cnt++;
1047  	/* side = vou_status & 0x10000; */
1048  
1049  	/* Clear only set interrupts */
1050  	sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1051  
1052  	vb = vou_dev->active;
1053  	if (list_is_singular(&vb->list)) {
1054  		/* Keep cycling while no next buffer is available */
1055  		sh_vou_schedule_next(vou_dev, &vb->vb);
1056  		spin_unlock(&vou_dev->lock);
1057  		return IRQ_HANDLED;
1058  	}
1059  
1060  	list_del(&vb->list);
1061  
1062  	vb->vb.vb2_buf.timestamp = ktime_get_ns();
1063  	vb->vb.sequence = vou_dev->sequence++;
1064  	vb->vb.field = V4L2_FIELD_INTERLACED;
1065  	vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1066  
1067  	vou_dev->active = list_entry(vou_dev->buf_list.next,
1068  				     struct sh_vou_buffer, list);
1069  
1070  	if (list_is_singular(&vou_dev->buf_list)) {
1071  		/* Keep cycling while no next buffer is available */
1072  		sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1073  	} else {
1074  		struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1075  						struct sh_vou_buffer, list);
1076  		sh_vou_schedule_next(vou_dev, &new->vb);
1077  	}
1078  
1079  	spin_unlock(&vou_dev->lock);
1080  
1081  	return IRQ_HANDLED;
1082  }
1083  
sh_vou_hw_init(struct sh_vou_device * vou_dev)1084  static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1085  {
1086  	struct sh_vou_pdata *pdata = vou_dev->pdata;
1087  	u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1088  	int i = 100;
1089  
1090  	/* Disable all IRQs */
1091  	sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1092  
1093  	/* Reset VOU interfaces - registers unaffected */
1094  	sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1095  	while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1096  		udelay(1);
1097  
1098  	if (!i)
1099  		return -ETIMEDOUT;
1100  
1101  	dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1102  
1103  	if (pdata->flags & SH_VOU_PCLK_FALLING)
1104  		voucr |= 1 << 28;
1105  	if (pdata->flags & SH_VOU_HSYNC_LOW)
1106  		voucr |= 1 << 27;
1107  	if (pdata->flags & SH_VOU_VSYNC_LOW)
1108  		voucr |= 1 << 26;
1109  	sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1110  
1111  	/* Manual register side switching at first */
1112  	sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1113  	/* Default - fixed HSYNC length, can be made configurable is required */
1114  	sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1115  
1116  	sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1117  
1118  	return 0;
1119  }
1120  
1121  /* File operations */
sh_vou_open(struct file * file)1122  static int sh_vou_open(struct file *file)
1123  {
1124  	struct sh_vou_device *vou_dev = video_drvdata(file);
1125  	int err;
1126  
1127  	if (mutex_lock_interruptible(&vou_dev->fop_lock))
1128  		return -ERESTARTSYS;
1129  
1130  	err = v4l2_fh_open(file);
1131  	if (err)
1132  		goto done_open;
1133  	if (v4l2_fh_is_singular_file(file) &&
1134  	    vou_dev->status == SH_VOU_INITIALISING) {
1135  		/* First open */
1136  		err = pm_runtime_resume_and_get(vou_dev->v4l2_dev.dev);
1137  		if (err < 0) {
1138  			v4l2_fh_release(file);
1139  			goto done_open;
1140  		}
1141  		err = sh_vou_hw_init(vou_dev);
1142  		if (err < 0) {
1143  			pm_runtime_put(vou_dev->v4l2_dev.dev);
1144  			v4l2_fh_release(file);
1145  		} else {
1146  			vou_dev->status = SH_VOU_IDLE;
1147  		}
1148  	}
1149  done_open:
1150  	mutex_unlock(&vou_dev->fop_lock);
1151  	return err;
1152  }
1153  
sh_vou_release(struct file * file)1154  static int sh_vou_release(struct file *file)
1155  {
1156  	struct sh_vou_device *vou_dev = video_drvdata(file);
1157  	bool is_last;
1158  
1159  	mutex_lock(&vou_dev->fop_lock);
1160  	is_last = v4l2_fh_is_singular_file(file);
1161  	_vb2_fop_release(file, NULL);
1162  	if (is_last) {
1163  		/* Last close */
1164  		vou_dev->status = SH_VOU_INITIALISING;
1165  		sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1166  		pm_runtime_put(vou_dev->v4l2_dev.dev);
1167  	}
1168  	mutex_unlock(&vou_dev->fop_lock);
1169  	return 0;
1170  }
1171  
1172  /* sh_vou display ioctl operations */
1173  static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1174  	.vidioc_querycap		= sh_vou_querycap,
1175  	.vidioc_enum_fmt_vid_out	= sh_vou_enum_fmt_vid_out,
1176  	.vidioc_g_fmt_vid_out		= sh_vou_g_fmt_vid_out,
1177  	.vidioc_s_fmt_vid_out		= sh_vou_s_fmt_vid_out,
1178  	.vidioc_try_fmt_vid_out		= sh_vou_try_fmt_vid_out,
1179  	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
1180  	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
1181  	.vidioc_querybuf		= vb2_ioctl_querybuf,
1182  	.vidioc_qbuf			= vb2_ioctl_qbuf,
1183  	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
1184  	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
1185  	.vidioc_streamon		= vb2_ioctl_streamon,
1186  	.vidioc_streamoff		= vb2_ioctl_streamoff,
1187  	.vidioc_expbuf			= vb2_ioctl_expbuf,
1188  	.vidioc_g_output		= sh_vou_g_output,
1189  	.vidioc_s_output		= sh_vou_s_output,
1190  	.vidioc_enum_output		= sh_vou_enum_output,
1191  	.vidioc_s_std			= sh_vou_s_std,
1192  	.vidioc_g_std			= sh_vou_g_std,
1193  	.vidioc_g_selection		= sh_vou_g_selection,
1194  	.vidioc_s_selection		= sh_vou_s_selection,
1195  	.vidioc_log_status		= sh_vou_log_status,
1196  };
1197  
1198  static const struct v4l2_file_operations sh_vou_fops = {
1199  	.owner		= THIS_MODULE,
1200  	.open		= sh_vou_open,
1201  	.release	= sh_vou_release,
1202  	.unlocked_ioctl	= video_ioctl2,
1203  	.mmap		= vb2_fop_mmap,
1204  	.poll		= vb2_fop_poll,
1205  	.write		= vb2_fop_write,
1206  };
1207  
1208  static const struct video_device sh_vou_video_template = {
1209  	.name		= "sh_vou",
1210  	.fops		= &sh_vou_fops,
1211  	.ioctl_ops	= &sh_vou_ioctl_ops,
1212  	.tvnorms	= V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1213  	.vfl_dir	= VFL_DIR_TX,
1214  	.device_caps	= V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
1215  			  V4L2_CAP_STREAMING,
1216  };
1217  
sh_vou_probe(struct platform_device * pdev)1218  static int sh_vou_probe(struct platform_device *pdev)
1219  {
1220  	struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1221  	struct v4l2_rect *rect;
1222  	struct v4l2_pix_format *pix;
1223  	struct i2c_adapter *i2c_adap;
1224  	struct video_device *vdev;
1225  	struct sh_vou_device *vou_dev;
1226  	struct v4l2_subdev *subdev;
1227  	struct vb2_queue *q;
1228  	int irq, ret;
1229  
1230  	if (!vou_pdata) {
1231  		dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1232  		return -ENODEV;
1233  	}
1234  
1235  	irq = platform_get_irq(pdev, 0);
1236  	if (irq < 0)
1237  		return irq;
1238  
1239  	vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1240  	if (!vou_dev)
1241  		return -ENOMEM;
1242  
1243  	INIT_LIST_HEAD(&vou_dev->buf_list);
1244  	spin_lock_init(&vou_dev->lock);
1245  	mutex_init(&vou_dev->fop_lock);
1246  	vou_dev->pdata = vou_pdata;
1247  	vou_dev->status = SH_VOU_INITIALISING;
1248  	vou_dev->pix_idx = 1;
1249  
1250  	rect = &vou_dev->rect;
1251  	pix = &vou_dev->pix;
1252  
1253  	/* Fill in defaults */
1254  	vou_dev->std		= V4L2_STD_NTSC_M;
1255  	rect->left		= 0;
1256  	rect->top		= 0;
1257  	rect->width		= VOU_MAX_IMAGE_WIDTH;
1258  	rect->height		= 480;
1259  	pix->width		= VOU_MAX_IMAGE_WIDTH;
1260  	pix->height		= 480;
1261  	pix->pixelformat	= V4L2_PIX_FMT_NV16;
1262  	pix->field		= V4L2_FIELD_INTERLACED;
1263  	pix->bytesperline	= VOU_MAX_IMAGE_WIDTH;
1264  	pix->sizeimage		= VOU_MAX_IMAGE_WIDTH * 2 * 480;
1265  	pix->colorspace		= V4L2_COLORSPACE_SMPTE170M;
1266  
1267  	vou_dev->base = devm_platform_ioremap_resource(pdev, 0);
1268  	if (IS_ERR(vou_dev->base))
1269  		return PTR_ERR(vou_dev->base);
1270  
1271  	ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1272  	if (ret < 0)
1273  		return ret;
1274  
1275  	ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1276  	if (ret < 0) {
1277  		dev_err(&pdev->dev, "Error registering v4l2 device\n");
1278  		return ret;
1279  	}
1280  
1281  	vdev = &vou_dev->vdev;
1282  	*vdev = sh_vou_video_template;
1283  	if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1284  		vdev->tvnorms |= V4L2_STD_PAL;
1285  	vdev->v4l2_dev = &vou_dev->v4l2_dev;
1286  	vdev->release = video_device_release_empty;
1287  	vdev->lock = &vou_dev->fop_lock;
1288  
1289  	video_set_drvdata(vdev, vou_dev);
1290  
1291  	/* Initialize the vb2 queue */
1292  	q = &vou_dev->queue;
1293  	q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1294  	q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1295  	q->drv_priv = vou_dev;
1296  	q->buf_struct_size = sizeof(struct sh_vou_buffer);
1297  	q->ops = &sh_vou_qops;
1298  	q->mem_ops = &vb2_dma_contig_memops;
1299  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1300  	q->min_buffers_needed = 2;
1301  	q->lock = &vou_dev->fop_lock;
1302  	q->dev = &pdev->dev;
1303  	ret = vb2_queue_init(q);
1304  	if (ret)
1305  		goto ei2cgadap;
1306  
1307  	vdev->queue = q;
1308  	INIT_LIST_HEAD(&vou_dev->buf_list);
1309  
1310  	pm_runtime_enable(&pdev->dev);
1311  	pm_runtime_resume(&pdev->dev);
1312  
1313  	i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1314  	if (!i2c_adap) {
1315  		ret = -ENODEV;
1316  		goto ei2cgadap;
1317  	}
1318  
1319  	ret = sh_vou_hw_init(vou_dev);
1320  	if (ret < 0)
1321  		goto ereset;
1322  
1323  	subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1324  			vou_pdata->board_info, NULL);
1325  	if (!subdev) {
1326  		ret = -ENOMEM;
1327  		goto ei2cnd;
1328  	}
1329  
1330  	ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
1331  	if (ret < 0)
1332  		goto evregdev;
1333  
1334  	return 0;
1335  
1336  evregdev:
1337  ei2cnd:
1338  ereset:
1339  	i2c_put_adapter(i2c_adap);
1340  ei2cgadap:
1341  	pm_runtime_disable(&pdev->dev);
1342  	v4l2_device_unregister(&vou_dev->v4l2_dev);
1343  	return ret;
1344  }
1345  
sh_vou_remove(struct platform_device * pdev)1346  static void sh_vou_remove(struct platform_device *pdev)
1347  {
1348  	struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1349  	struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1350  						struct sh_vou_device, v4l2_dev);
1351  	struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1352  					    struct v4l2_subdev, list);
1353  	struct i2c_client *client = v4l2_get_subdevdata(sd);
1354  
1355  	pm_runtime_disable(&pdev->dev);
1356  	video_unregister_device(&vou_dev->vdev);
1357  	i2c_put_adapter(client->adapter);
1358  	v4l2_device_unregister(&vou_dev->v4l2_dev);
1359  }
1360  
1361  static struct platform_driver sh_vou = {
1362  	.remove_new = sh_vou_remove,
1363  	.driver  = {
1364  		.name	= "sh-vou",
1365  	},
1366  };
1367  
1368  module_platform_driver_probe(sh_vou, sh_vou_probe);
1369  
1370  MODULE_DESCRIPTION("SuperH VOU driver");
1371  MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1372  MODULE_LICENSE("GPL v2");
1373  MODULE_VERSION("0.1.0");
1374  MODULE_ALIAS("platform:sh-vou");
1375