2 * Support eMMa-PrP through mem2mem framework.
4 * eMMa-PrP is a piece of HW that allows fetching buffers
5 * from one memory location and do several operations on
6 * them such as scaling or format conversion giving, as a result
7 * a new processed buffer in another memory location.
9 * Based on mem2mem_testdev.c by Pawel Osciak.
11 * Copyright (c) 2011 Vista Silicon S.L.
12 * Javier Martin <javier.martin@vista-silicon.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version
19 #include <linux/module.h>
20 #include <linux/clk.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
25 #include <linux/platform_device.h>
26 #include <media/v4l2-mem2mem.h>
27 #include <media/v4l2-device.h>
28 #include <media/v4l2-ioctl.h>
29 #include <media/videobuf2-dma-contig.h>
30 #include <asm/sizes.h>
32 #define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
34 MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
35 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
36 MODULE_LICENSE("GPL");
37 MODULE_VERSION("0.0.1");
40 module_param(debug
, bool, 0644);
47 #define S_ALIGN 1 /* multiple of 2 */
48 #define W_ALIGN_YUV420 3 /* multiple of 8 */
49 #define W_ALIGN_OTHERS 2 /* multiple of 4 */
50 #define H_ALIGN 1 /* multiple of 2 */
52 /* Flags that indicate a format can be used for capture/output */
53 #define MEM2MEM_CAPTURE (1 << 0)
54 #define MEM2MEM_OUTPUT (1 << 1)
56 #define MEM2MEM_NAME "m2m-emmaprp"
58 /* In bytes, per queue */
59 #define MEM2MEM_VID_MEM_LIMIT SZ_16M
61 #define dprintk(dev, fmt, arg...) \
62 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
66 #define PRP_INTR_CNTL 0x04
67 #define PRP_INTRSTATUS 0x08
68 #define PRP_SOURCE_Y_PTR 0x0c
69 #define PRP_SOURCE_CB_PTR 0x10
70 #define PRP_SOURCE_CR_PTR 0x14
71 #define PRP_DEST_RGB1_PTR 0x18
72 #define PRP_DEST_RGB2_PTR 0x1c
73 #define PRP_DEST_Y_PTR 0x20
74 #define PRP_DEST_CB_PTR 0x24
75 #define PRP_DEST_CR_PTR 0x28
76 #define PRP_SRC_FRAME_SIZE 0x2c
77 #define PRP_DEST_CH1_LINE_STRIDE 0x30
78 #define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
79 #define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
80 #define PRP_CH1_OUT_IMAGE_SIZE 0x3c
81 #define PRP_CH2_OUT_IMAGE_SIZE 0x40
82 #define PRP_SRC_LINE_STRIDE 0x44
83 #define PRP_CSC_COEF_012 0x48
84 #define PRP_CSC_COEF_345 0x4c
85 #define PRP_CSC_COEF_678 0x50
86 #define PRP_CH1_RZ_HORI_COEF1 0x54
87 #define PRP_CH1_RZ_HORI_COEF2 0x58
88 #define PRP_CH1_RZ_HORI_VALID 0x5c
89 #define PRP_CH1_RZ_VERT_COEF1 0x60
90 #define PRP_CH1_RZ_VERT_COEF2 0x64
91 #define PRP_CH1_RZ_VERT_VALID 0x68
92 #define PRP_CH2_RZ_HORI_COEF1 0x6c
93 #define PRP_CH2_RZ_HORI_COEF2 0x70
94 #define PRP_CH2_RZ_HORI_VALID 0x74
95 #define PRP_CH2_RZ_VERT_COEF1 0x78
96 #define PRP_CH2_RZ_VERT_COEF2 0x7c
97 #define PRP_CH2_RZ_VERT_VALID 0x80
99 #define PRP_CNTL_CH1EN (1 << 0)
100 #define PRP_CNTL_CH2EN (1 << 1)
101 #define PRP_CNTL_CSIEN (1 << 2)
102 #define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
103 #define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
104 #define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
105 #define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
106 #define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
107 #define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
108 #define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
109 #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
110 #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
111 #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
112 #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
113 #define PRP_CNTL_CH1_LEN (1 << 9)
114 #define PRP_CNTL_CH2_LEN (1 << 10)
115 #define PRP_CNTL_SKIP_FRAME (1 << 11)
116 #define PRP_CNTL_SWRST (1 << 12)
117 #define PRP_CNTL_CLKEN (1 << 13)
118 #define PRP_CNTL_WEN (1 << 14)
119 #define PRP_CNTL_CH1BYP (1 << 15)
120 #define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
121 #define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
122 #define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
123 #define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
124 #define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
125 #define PRP_CNTL_CH2B1EN (1 << 29)
126 #define PRP_CNTL_CH2B2EN (1 << 30)
127 #define PRP_CNTL_CH2FEN (1 << 31)
129 #define PRP_SIZE_HEIGHT(x) (x)
130 #define PRP_SIZE_WIDTH(x) ((x) << 16)
132 /* IRQ Enable and status register */
133 #define PRP_INTR_RDERR (1 << 0)
134 #define PRP_INTR_CH1WERR (1 << 1)
135 #define PRP_INTR_CH2WERR (1 << 2)
136 #define PRP_INTR_CH1FC (1 << 3)
137 #define PRP_INTR_CH2FC (1 << 5)
138 #define PRP_INTR_LBOVF (1 << 7)
139 #define PRP_INTR_CH2OVF (1 << 8)
141 #define PRP_INTR_ST_RDERR (1 << 0)
142 #define PRP_INTR_ST_CH1WERR (1 << 1)
143 #define PRP_INTR_ST_CH2WERR (1 << 2)
144 #define PRP_INTR_ST_CH2B2CI (1 << 3)
145 #define PRP_INTR_ST_CH2B1CI (1 << 4)
146 #define PRP_INTR_ST_CH1B2CI (1 << 5)
147 #define PRP_INTR_ST_CH1B1CI (1 << 6)
148 #define PRP_INTR_ST_LBOVF (1 << 7)
149 #define PRP_INTR_ST_CH2OVF (1 << 8)
154 /* Types the format can be used for */
158 static struct emmaprp_fmt formats
[] = {
160 .name
= "YUV 4:2:0 Planar",
161 .fourcc
= V4L2_PIX_FMT_YUV420
,
162 .types
= MEM2MEM_CAPTURE
,
165 .name
= "4:2:2, packed, YUYV",
166 .fourcc
= V4L2_PIX_FMT_YUYV
,
167 .types
= MEM2MEM_OUTPUT
,
171 /* Per-queue, driver-specific private data */
172 struct emmaprp_q_data
{
175 unsigned int sizeimage
;
176 struct emmaprp_fmt
*fmt
;
184 #define NUM_FORMATS ARRAY_SIZE(formats)
186 static struct emmaprp_fmt
*find_format(struct v4l2_format
*f
)
188 struct emmaprp_fmt
*fmt
;
191 for (k
= 0; k
< NUM_FORMATS
; k
++) {
193 if (fmt
->fourcc
== f
->fmt
.pix
.pixelformat
)
197 if (k
== NUM_FORMATS
)
204 struct v4l2_device v4l2_dev
;
205 struct video_device
*vfd
;
207 struct mutex dev_mutex
;
211 void __iomem
*base_emma
;
212 struct clk
*clk_emma
;
213 struct resource
*res_emma
;
215 struct v4l2_m2m_dev
*m2m_dev
;
216 struct vb2_alloc_ctx
*alloc_ctx
;
220 struct emmaprp_dev
*dev
;
221 /* Abort requested by m2m */
223 struct emmaprp_q_data q_data
[2];
224 struct v4l2_m2m_ctx
*m2m_ctx
;
227 static struct emmaprp_q_data
*get_q_data(struct emmaprp_ctx
*ctx
,
228 enum v4l2_buf_type type
)
231 case V4L2_BUF_TYPE_VIDEO_OUTPUT
:
232 return &(ctx
->q_data
[V4L2_M2M_SRC
]);
233 case V4L2_BUF_TYPE_VIDEO_CAPTURE
:
234 return &(ctx
->q_data
[V4L2_M2M_DST
]);
244 static void emmaprp_job_abort(void *priv
)
246 struct emmaprp_ctx
*ctx
= priv
;
247 struct emmaprp_dev
*pcdev
= ctx
->dev
;
251 dprintk(pcdev
, "Aborting task\n");
253 v4l2_m2m_job_finish(pcdev
->m2m_dev
, ctx
->m2m_ctx
);
256 static void emmaprp_lock(void *priv
)
258 struct emmaprp_ctx
*ctx
= priv
;
259 struct emmaprp_dev
*pcdev
= ctx
->dev
;
260 mutex_lock(&pcdev
->dev_mutex
);
263 static void emmaprp_unlock(void *priv
)
265 struct emmaprp_ctx
*ctx
= priv
;
266 struct emmaprp_dev
*pcdev
= ctx
->dev
;
267 mutex_unlock(&pcdev
->dev_mutex
);
270 static inline void emmaprp_dump_regs(struct emmaprp_dev
*pcdev
)
273 "eMMa-PrP Registers:\n"
274 " SOURCE_Y_PTR = 0x%08X\n"
275 " SRC_FRAME_SIZE = 0x%08X\n"
276 " DEST_Y_PTR = 0x%08X\n"
277 " DEST_CR_PTR = 0x%08X\n"
278 " DEST_CB_PTR = 0x%08X\n"
279 " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
281 readl(pcdev
->base_emma
+ PRP_SOURCE_Y_PTR
),
282 readl(pcdev
->base_emma
+ PRP_SRC_FRAME_SIZE
),
283 readl(pcdev
->base_emma
+ PRP_DEST_Y_PTR
),
284 readl(pcdev
->base_emma
+ PRP_DEST_CR_PTR
),
285 readl(pcdev
->base_emma
+ PRP_DEST_CB_PTR
),
286 readl(pcdev
->base_emma
+ PRP_CH2_OUT_IMAGE_SIZE
),
287 readl(pcdev
->base_emma
+ PRP_CNTL
));
290 static void emmaprp_device_run(void *priv
)
292 struct emmaprp_ctx
*ctx
= priv
;
293 struct emmaprp_q_data
*s_q_data
, *d_q_data
;
294 struct vb2_buffer
*src_buf
, *dst_buf
;
295 struct emmaprp_dev
*pcdev
= ctx
->dev
;
296 unsigned int s_width
, s_height
;
297 unsigned int d_width
, d_height
;
299 dma_addr_t p_in
, p_out
;
302 src_buf
= v4l2_m2m_next_src_buf(ctx
->m2m_ctx
);
303 dst_buf
= v4l2_m2m_next_dst_buf(ctx
->m2m_ctx
);
305 s_q_data
= get_q_data(ctx
, V4L2_BUF_TYPE_VIDEO_OUTPUT
);
306 s_width
= s_q_data
->width
;
307 s_height
= s_q_data
->height
;
309 d_q_data
= get_q_data(ctx
, V4L2_BUF_TYPE_VIDEO_CAPTURE
);
310 d_width
= d_q_data
->width
;
311 d_height
= d_q_data
->height
;
312 d_size
= d_width
* d_height
;
314 p_in
= vb2_dma_contig_plane_dma_addr(src_buf
, 0);
315 p_out
= vb2_dma_contig_plane_dma_addr(dst_buf
, 0);
316 if (!p_in
|| !p_out
) {
317 v4l2_err(&pcdev
->v4l2_dev
,
318 "Acquiring kernel pointers to buffers failed\n");
322 /* Input frame parameters */
323 writel(p_in
, pcdev
->base_emma
+ PRP_SOURCE_Y_PTR
);
324 writel(PRP_SIZE_WIDTH(s_width
) | PRP_SIZE_HEIGHT(s_height
),
325 pcdev
->base_emma
+ PRP_SRC_FRAME_SIZE
);
327 /* Output frame parameters */
328 writel(p_out
, pcdev
->base_emma
+ PRP_DEST_Y_PTR
);
329 writel(p_out
+ d_size
, pcdev
->base_emma
+ PRP_DEST_CB_PTR
);
330 writel(p_out
+ d_size
+ (d_size
>> 2),
331 pcdev
->base_emma
+ PRP_DEST_CR_PTR
);
332 writel(PRP_SIZE_WIDTH(d_width
) | PRP_SIZE_HEIGHT(d_height
),
333 pcdev
->base_emma
+ PRP_CH2_OUT_IMAGE_SIZE
);
335 /* IRQ configuration */
336 tmp
= readl(pcdev
->base_emma
+ PRP_INTR_CNTL
);
337 writel(tmp
| PRP_INTR_RDERR
|
340 pcdev
->base_emma
+ PRP_INTR_CNTL
);
342 emmaprp_dump_regs(pcdev
);
344 /* Enable transfer */
345 tmp
= readl(pcdev
->base_emma
+ PRP_CNTL
);
346 writel(tmp
| PRP_CNTL_CH2_OUT_YUV420
|
347 PRP_CNTL_DATA_IN_YUV422
|
349 pcdev
->base_emma
+ PRP_CNTL
);
352 static irqreturn_t
emmaprp_irq(int irq_emma
, void *data
)
354 struct emmaprp_dev
*pcdev
= data
;
355 struct emmaprp_ctx
*curr_ctx
;
356 struct vb2_buffer
*src_vb
, *dst_vb
;
360 /* Check irq flags and clear irq */
361 irqst
= readl(pcdev
->base_emma
+ PRP_INTRSTATUS
);
362 writel(irqst
, pcdev
->base_emma
+ PRP_INTRSTATUS
);
363 dprintk(pcdev
, "irqst = 0x%08x\n", irqst
);
365 curr_ctx
= v4l2_m2m_get_curr_priv(pcdev
->m2m_dev
);
366 if (curr_ctx
== NULL
) {
367 pr_err("Instance released before the end of transaction\n");
371 if (!curr_ctx
->aborting
) {
372 if ((irqst
& PRP_INTR_ST_RDERR
) ||
373 (irqst
& PRP_INTR_ST_CH2WERR
)) {
374 pr_err("PrP bus error ocurred, this transfer is probably corrupted\n");
375 writel(PRP_CNTL_SWRST
, pcdev
->base_emma
+ PRP_CNTL
);
376 } else if (irqst
& PRP_INTR_ST_CH2B1CI
) { /* buffer ready */
377 src_vb
= v4l2_m2m_src_buf_remove(curr_ctx
->m2m_ctx
);
378 dst_vb
= v4l2_m2m_dst_buf_remove(curr_ctx
->m2m_ctx
);
380 spin_lock_irqsave(&pcdev
->irqlock
, flags
);
381 v4l2_m2m_buf_done(src_vb
, VB2_BUF_STATE_DONE
);
382 v4l2_m2m_buf_done(dst_vb
, VB2_BUF_STATE_DONE
);
383 spin_unlock_irqrestore(&pcdev
->irqlock
, flags
);
387 v4l2_m2m_job_finish(pcdev
->m2m_dev
, curr_ctx
->m2m_ctx
);
394 static int vidioc_querycap(struct file
*file
, void *priv
,
395 struct v4l2_capability
*cap
)
397 strncpy(cap
->driver
, MEM2MEM_NAME
, sizeof(cap
->driver
) - 1);
398 strncpy(cap
->card
, MEM2MEM_NAME
, sizeof(cap
->card
) - 1);
399 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_VIDEO_OUTPUT
400 | V4L2_CAP_STREAMING
;
405 static int enum_fmt(struct v4l2_fmtdesc
*f
, u32 type
)
408 struct emmaprp_fmt
*fmt
;
412 for (i
= 0; i
< NUM_FORMATS
; ++i
) {
413 if (formats
[i
].types
& type
) {
414 /* index-th format of type type found ? */
417 /* Correct type but haven't reached our index yet,
418 * just increment per-type index */
423 if (i
< NUM_FORMATS
) {
426 strlcpy(f
->description
, fmt
->name
, sizeof(f
->description
) - 1);
427 f
->pixelformat
= fmt
->fourcc
;
431 /* Format not found */
435 static int vidioc_enum_fmt_vid_cap(struct file
*file
, void *priv
,
436 struct v4l2_fmtdesc
*f
)
438 return enum_fmt(f
, MEM2MEM_CAPTURE
);
441 static int vidioc_enum_fmt_vid_out(struct file
*file
, void *priv
,
442 struct v4l2_fmtdesc
*f
)
444 return enum_fmt(f
, MEM2MEM_OUTPUT
);
447 static int vidioc_g_fmt(struct emmaprp_ctx
*ctx
, struct v4l2_format
*f
)
449 struct vb2_queue
*vq
;
450 struct emmaprp_q_data
*q_data
;
452 vq
= v4l2_m2m_get_vq(ctx
->m2m_ctx
, f
->type
);
456 q_data
= get_q_data(ctx
, f
->type
);
458 f
->fmt
.pix
.width
= q_data
->width
;
459 f
->fmt
.pix
.height
= q_data
->height
;
460 f
->fmt
.pix
.field
= V4L2_FIELD_NONE
;
461 f
->fmt
.pix
.pixelformat
= q_data
->fmt
->fourcc
;
462 if (f
->fmt
.pix
.pixelformat
== V4L2_PIX_FMT_YUV420
)
463 f
->fmt
.pix
.bytesperline
= q_data
->width
* 3 / 2;
465 f
->fmt
.pix
.bytesperline
= q_data
->width
* 2;
466 f
->fmt
.pix
.sizeimage
= q_data
->sizeimage
;
471 static int vidioc_g_fmt_vid_out(struct file
*file
, void *priv
,
472 struct v4l2_format
*f
)
474 return vidioc_g_fmt(priv
, f
);
477 static int vidioc_g_fmt_vid_cap(struct file
*file
, void *priv
,
478 struct v4l2_format
*f
)
480 return vidioc_g_fmt(priv
, f
);
483 static int vidioc_try_fmt(struct v4l2_format
*f
)
485 enum v4l2_field field
;
491 field
= f
->fmt
.pix
.field
;
492 if (field
== V4L2_FIELD_ANY
)
493 field
= V4L2_FIELD_NONE
;
494 else if (V4L2_FIELD_NONE
!= field
)
497 /* V4L2 specification suggests the driver corrects the format struct
498 * if any of the dimensions is unsupported */
499 f
->fmt
.pix
.field
= field
;
501 if (f
->fmt
.pix
.pixelformat
== V4L2_PIX_FMT_YUV420
) {
502 v4l_bound_align_image(&f
->fmt
.pix
.width
, MIN_W
, MAX_W
,
503 W_ALIGN_YUV420
, &f
->fmt
.pix
.height
,
504 MIN_H
, MAX_H
, H_ALIGN
, S_ALIGN
);
505 f
->fmt
.pix
.bytesperline
= f
->fmt
.pix
.width
* 3 / 2;
507 v4l_bound_align_image(&f
->fmt
.pix
.width
, MIN_W
, MAX_W
,
508 W_ALIGN_OTHERS
, &f
->fmt
.pix
.height
,
509 MIN_H
, MAX_H
, H_ALIGN
, S_ALIGN
);
510 f
->fmt
.pix
.bytesperline
= f
->fmt
.pix
.width
* 2;
512 f
->fmt
.pix
.sizeimage
= f
->fmt
.pix
.height
* f
->fmt
.pix
.bytesperline
;
517 static int vidioc_try_fmt_vid_cap(struct file
*file
, void *priv
,
518 struct v4l2_format
*f
)
520 struct emmaprp_fmt
*fmt
;
521 struct emmaprp_ctx
*ctx
= priv
;
523 fmt
= find_format(f
);
524 if (!fmt
|| !(fmt
->types
& MEM2MEM_CAPTURE
)) {
525 v4l2_err(&ctx
->dev
->v4l2_dev
,
526 "Fourcc format (0x%08x) invalid.\n",
527 f
->fmt
.pix
.pixelformat
);
531 return vidioc_try_fmt(f
);
534 static int vidioc_try_fmt_vid_out(struct file
*file
, void *priv
,
535 struct v4l2_format
*f
)
537 struct emmaprp_fmt
*fmt
;
538 struct emmaprp_ctx
*ctx
= priv
;
540 fmt
= find_format(f
);
541 if (!fmt
|| !(fmt
->types
& MEM2MEM_OUTPUT
)) {
542 v4l2_err(&ctx
->dev
->v4l2_dev
,
543 "Fourcc format (0x%08x) invalid.\n",
544 f
->fmt
.pix
.pixelformat
);
548 return vidioc_try_fmt(f
);
551 static int vidioc_s_fmt(struct emmaprp_ctx
*ctx
, struct v4l2_format
*f
)
553 struct emmaprp_q_data
*q_data
;
554 struct vb2_queue
*vq
;
557 vq
= v4l2_m2m_get_vq(ctx
->m2m_ctx
, f
->type
);
561 q_data
= get_q_data(ctx
, f
->type
);
565 if (vb2_is_busy(vq
)) {
566 v4l2_err(&ctx
->dev
->v4l2_dev
, "%s queue busy\n", __func__
);
570 ret
= vidioc_try_fmt(f
);
574 q_data
->fmt
= find_format(f
);
575 q_data
->width
= f
->fmt
.pix
.width
;
576 q_data
->height
= f
->fmt
.pix
.height
;
577 if (q_data
->fmt
->fourcc
== V4L2_PIX_FMT_YUV420
)
578 q_data
->sizeimage
= q_data
->width
* q_data
->height
* 3 / 2;
580 q_data
->sizeimage
= q_data
->width
* q_data
->height
* 2;
583 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
584 f
->type
, q_data
->width
, q_data
->height
, q_data
->fmt
->fourcc
);
589 static int vidioc_s_fmt_vid_cap(struct file
*file
, void *priv
,
590 struct v4l2_format
*f
)
594 ret
= vidioc_try_fmt_vid_cap(file
, priv
, f
);
598 return vidioc_s_fmt(priv
, f
);
601 static int vidioc_s_fmt_vid_out(struct file
*file
, void *priv
,
602 struct v4l2_format
*f
)
606 ret
= vidioc_try_fmt_vid_out(file
, priv
, f
);
610 return vidioc_s_fmt(priv
, f
);
613 static int vidioc_reqbufs(struct file
*file
, void *priv
,
614 struct v4l2_requestbuffers
*reqbufs
)
616 struct emmaprp_ctx
*ctx
= priv
;
618 return v4l2_m2m_reqbufs(file
, ctx
->m2m_ctx
, reqbufs
);
621 static int vidioc_querybuf(struct file
*file
, void *priv
,
622 struct v4l2_buffer
*buf
)
624 struct emmaprp_ctx
*ctx
= priv
;
626 return v4l2_m2m_querybuf(file
, ctx
->m2m_ctx
, buf
);
629 static int vidioc_qbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*buf
)
631 struct emmaprp_ctx
*ctx
= priv
;
633 return v4l2_m2m_qbuf(file
, ctx
->m2m_ctx
, buf
);
636 static int vidioc_dqbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*buf
)
638 struct emmaprp_ctx
*ctx
= priv
;
640 return v4l2_m2m_dqbuf(file
, ctx
->m2m_ctx
, buf
);
643 static int vidioc_streamon(struct file
*file
, void *priv
,
644 enum v4l2_buf_type type
)
646 struct emmaprp_ctx
*ctx
= priv
;
648 return v4l2_m2m_streamon(file
, ctx
->m2m_ctx
, type
);
651 static int vidioc_streamoff(struct file
*file
, void *priv
,
652 enum v4l2_buf_type type
)
654 struct emmaprp_ctx
*ctx
= priv
;
656 return v4l2_m2m_streamoff(file
, ctx
->m2m_ctx
, type
);
659 static const struct v4l2_ioctl_ops emmaprp_ioctl_ops
= {
660 .vidioc_querycap
= vidioc_querycap
,
662 .vidioc_enum_fmt_vid_cap
= vidioc_enum_fmt_vid_cap
,
663 .vidioc_g_fmt_vid_cap
= vidioc_g_fmt_vid_cap
,
664 .vidioc_try_fmt_vid_cap
= vidioc_try_fmt_vid_cap
,
665 .vidioc_s_fmt_vid_cap
= vidioc_s_fmt_vid_cap
,
667 .vidioc_enum_fmt_vid_out
= vidioc_enum_fmt_vid_out
,
668 .vidioc_g_fmt_vid_out
= vidioc_g_fmt_vid_out
,
669 .vidioc_try_fmt_vid_out
= vidioc_try_fmt_vid_out
,
670 .vidioc_s_fmt_vid_out
= vidioc_s_fmt_vid_out
,
672 .vidioc_reqbufs
= vidioc_reqbufs
,
673 .vidioc_querybuf
= vidioc_querybuf
,
675 .vidioc_qbuf
= vidioc_qbuf
,
676 .vidioc_dqbuf
= vidioc_dqbuf
,
678 .vidioc_streamon
= vidioc_streamon
,
679 .vidioc_streamoff
= vidioc_streamoff
,
686 static int emmaprp_queue_setup(struct vb2_queue
*vq
,
687 const struct v4l2_format
*fmt
,
688 unsigned int *nbuffers
, unsigned int *nplanes
,
689 unsigned int sizes
[], void *alloc_ctxs
[])
691 struct emmaprp_ctx
*ctx
= vb2_get_drv_priv(vq
);
692 struct emmaprp_q_data
*q_data
;
693 unsigned int size
, count
= *nbuffers
;
695 q_data
= get_q_data(ctx
, vq
->type
);
697 if (q_data
->fmt
->fourcc
== V4L2_PIX_FMT_YUV420
)
698 size
= q_data
->width
* q_data
->height
* 3 / 2;
700 size
= q_data
->width
* q_data
->height
* 2;
702 while (size
* count
> MEM2MEM_VID_MEM_LIMIT
)
709 alloc_ctxs
[0] = ctx
->dev
->alloc_ctx
;
711 dprintk(ctx
->dev
, "get %d buffer(s) of size %d each.\n", count
, size
);
716 static int emmaprp_buf_prepare(struct vb2_buffer
*vb
)
718 struct emmaprp_ctx
*ctx
= vb2_get_drv_priv(vb
->vb2_queue
);
719 struct emmaprp_q_data
*q_data
;
721 dprintk(ctx
->dev
, "type: %d\n", vb
->vb2_queue
->type
);
723 q_data
= get_q_data(ctx
, vb
->vb2_queue
->type
);
725 if (vb2_plane_size(vb
, 0) < q_data
->sizeimage
) {
726 dprintk(ctx
->dev
, "%s data will not fit into plane"
727 "(%lu < %lu)\n", __func__
,
728 vb2_plane_size(vb
, 0),
729 (long)q_data
->sizeimage
);
733 vb2_set_plane_payload(vb
, 0, q_data
->sizeimage
);
738 static void emmaprp_buf_queue(struct vb2_buffer
*vb
)
740 struct emmaprp_ctx
*ctx
= vb2_get_drv_priv(vb
->vb2_queue
);
741 v4l2_m2m_buf_queue(ctx
->m2m_ctx
, vb
);
744 static struct vb2_ops emmaprp_qops
= {
745 .queue_setup
= emmaprp_queue_setup
,
746 .buf_prepare
= emmaprp_buf_prepare
,
747 .buf_queue
= emmaprp_buf_queue
,
750 static int queue_init(void *priv
, struct vb2_queue
*src_vq
,
751 struct vb2_queue
*dst_vq
)
753 struct emmaprp_ctx
*ctx
= priv
;
756 memset(src_vq
, 0, sizeof(*src_vq
));
757 src_vq
->type
= V4L2_BUF_TYPE_VIDEO_OUTPUT
;
758 src_vq
->io_modes
= VB2_MMAP
| VB2_USERPTR
;
759 src_vq
->drv_priv
= ctx
;
760 src_vq
->buf_struct_size
= sizeof(struct v4l2_m2m_buffer
);
761 src_vq
->ops
= &emmaprp_qops
;
762 src_vq
->mem_ops
= &vb2_dma_contig_memops
;
764 ret
= vb2_queue_init(src_vq
);
768 memset(dst_vq
, 0, sizeof(*dst_vq
));
769 dst_vq
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
770 dst_vq
->io_modes
= VB2_MMAP
| VB2_USERPTR
;
771 dst_vq
->drv_priv
= ctx
;
772 dst_vq
->buf_struct_size
= sizeof(struct v4l2_m2m_buffer
);
773 dst_vq
->ops
= &emmaprp_qops
;
774 dst_vq
->mem_ops
= &vb2_dma_contig_memops
;
776 return vb2_queue_init(dst_vq
);
782 static int emmaprp_open(struct file
*file
)
784 struct emmaprp_dev
*pcdev
= video_drvdata(file
);
785 struct emmaprp_ctx
*ctx
;
787 ctx
= kzalloc(sizeof *ctx
, GFP_KERNEL
);
791 file
->private_data
= ctx
;
794 ctx
->m2m_ctx
= v4l2_m2m_ctx_init(pcdev
->m2m_dev
, ctx
, &queue_init
);
796 if (IS_ERR(ctx
->m2m_ctx
)) {
797 int ret
= PTR_ERR(ctx
->m2m_ctx
);
803 clk_enable(pcdev
->clk_emma
);
804 ctx
->q_data
[V4L2_M2M_SRC
].fmt
= &formats
[1];
805 ctx
->q_data
[V4L2_M2M_DST
].fmt
= &formats
[0];
807 dprintk(pcdev
, "Created instance %p, m2m_ctx: %p\n", ctx
, ctx
->m2m_ctx
);
812 static int emmaprp_release(struct file
*file
)
814 struct emmaprp_dev
*pcdev
= video_drvdata(file
);
815 struct emmaprp_ctx
*ctx
= file
->private_data
;
817 dprintk(pcdev
, "Releasing instance %p\n", ctx
);
819 clk_disable(pcdev
->clk_emma
);
820 v4l2_m2m_ctx_release(ctx
->m2m_ctx
);
826 static unsigned int emmaprp_poll(struct file
*file
,
827 struct poll_table_struct
*wait
)
829 struct emmaprp_ctx
*ctx
= file
->private_data
;
831 return v4l2_m2m_poll(file
, ctx
->m2m_ctx
, wait
);
834 static int emmaprp_mmap(struct file
*file
, struct vm_area_struct
*vma
)
836 struct emmaprp_ctx
*ctx
= file
->private_data
;
838 return v4l2_m2m_mmap(file
, ctx
->m2m_ctx
, vma
);
841 static const struct v4l2_file_operations emmaprp_fops
= {
842 .owner
= THIS_MODULE
,
843 .open
= emmaprp_open
,
844 .release
= emmaprp_release
,
845 .poll
= emmaprp_poll
,
846 .unlocked_ioctl
= video_ioctl2
,
847 .mmap
= emmaprp_mmap
,
850 static struct video_device emmaprp_videodev
= {
851 .name
= MEM2MEM_NAME
,
852 .fops
= &emmaprp_fops
,
853 .ioctl_ops
= &emmaprp_ioctl_ops
,
855 .release
= video_device_release
,
858 static struct v4l2_m2m_ops m2m_ops
= {
859 .device_run
= emmaprp_device_run
,
860 .job_abort
= emmaprp_job_abort
,
861 .lock
= emmaprp_lock
,
862 .unlock
= emmaprp_unlock
,
865 static int emmaprp_probe(struct platform_device
*pdev
)
867 struct emmaprp_dev
*pcdev
;
868 struct video_device
*vfd
;
869 struct resource
*res_emma
;
873 pcdev
= kzalloc(sizeof *pcdev
, GFP_KERNEL
);
877 spin_lock_init(&pcdev
->irqlock
);
879 pcdev
->clk_emma
= clk_get(&pdev
->dev
, NULL
);
880 if (IS_ERR(pcdev
->clk_emma
)) {
881 ret
= PTR_ERR(pcdev
->clk_emma
);
885 irq_emma
= platform_get_irq(pdev
, 0);
886 res_emma
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
887 if (irq_emma
< 0 || res_emma
== NULL
) {
888 dev_err(&pdev
->dev
, "Missing platform resources data\n");
893 ret
= v4l2_device_register(&pdev
->dev
, &pcdev
->v4l2_dev
);
897 mutex_init(&pcdev
->dev_mutex
);
899 vfd
= video_device_alloc();
901 v4l2_err(&pcdev
->v4l2_dev
, "Failed to allocate video device\n");
906 *vfd
= emmaprp_videodev
;
907 /* Locking in file operations other than ioctl should be done
908 by the driver, not the V4L2 core.
909 This driver needs auditing so that this flag can be removed. */
910 set_bit(V4L2_FL_LOCK_ALL_FOPS
, &vfd
->flags
);
911 vfd
->lock
= &pcdev
->dev_mutex
;
913 video_set_drvdata(vfd
, pcdev
);
914 snprintf(vfd
->name
, sizeof(vfd
->name
), "%s", emmaprp_videodev
.name
);
916 v4l2_info(&pcdev
->v4l2_dev
, EMMAPRP_MODULE_NAME
917 " Device registered as /dev/video%d\n", vfd
->num
);
919 platform_set_drvdata(pdev
, pcdev
);
921 if (devm_request_mem_region(&pdev
->dev
, res_emma
->start
,
922 resource_size(res_emma
), MEM2MEM_NAME
) == NULL
)
925 pcdev
->base_emma
= devm_ioremap(&pdev
->dev
, res_emma
->start
,
926 resource_size(res_emma
));
927 if (!pcdev
->base_emma
)
930 pcdev
->irq_emma
= irq_emma
;
931 pcdev
->res_emma
= res_emma
;
933 if (devm_request_irq(&pdev
->dev
, pcdev
->irq_emma
, emmaprp_irq
,
934 0, MEM2MEM_NAME
, pcdev
) < 0)
937 pcdev
->alloc_ctx
= vb2_dma_contig_init_ctx(&pdev
->dev
);
938 if (IS_ERR(pcdev
->alloc_ctx
)) {
939 v4l2_err(&pcdev
->v4l2_dev
, "Failed to alloc vb2 context\n");
940 ret
= PTR_ERR(pcdev
->alloc_ctx
);
944 pcdev
->m2m_dev
= v4l2_m2m_init(&m2m_ops
);
945 if (IS_ERR(pcdev
->m2m_dev
)) {
946 v4l2_err(&pcdev
->v4l2_dev
, "Failed to init mem2mem device\n");
947 ret
= PTR_ERR(pcdev
->m2m_dev
);
951 ret
= video_register_device(vfd
, VFL_TYPE_GRABBER
, 0);
953 v4l2_err(&pcdev
->v4l2_dev
, "Failed to register video device\n");
961 v4l2_m2m_release(pcdev
->m2m_dev
);
963 vb2_dma_contig_cleanup_ctx(pcdev
->alloc_ctx
);
965 video_device_release(vfd
);
967 v4l2_device_unregister(&pcdev
->v4l2_dev
);
969 clk_put(pcdev
->clk_emma
);
976 static int emmaprp_remove(struct platform_device
*pdev
)
978 struct emmaprp_dev
*pcdev
= platform_get_drvdata(pdev
);
980 v4l2_info(&pcdev
->v4l2_dev
, "Removing " EMMAPRP_MODULE_NAME
);
982 video_unregister_device(pcdev
->vfd
);
983 v4l2_m2m_release(pcdev
->m2m_dev
);
984 vb2_dma_contig_cleanup_ctx(pcdev
->alloc_ctx
);
985 v4l2_device_unregister(&pcdev
->v4l2_dev
);
986 clk_put(pcdev
->clk_emma
);
992 static struct platform_driver emmaprp_pdrv
= {
993 .probe
= emmaprp_probe
,
994 .remove
= emmaprp_remove
,
996 .name
= MEM2MEM_NAME
,
997 .owner
= THIS_MODULE
,
1001 static void __exit
emmaprp_exit(void)
1003 platform_driver_unregister(&emmaprp_pdrv
);
1006 static int __init
emmaprp_init(void)
1008 return platform_driver_register(&emmaprp_pdrv
);
1011 module_init(emmaprp_init
);
1012 module_exit(emmaprp_exit
);