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mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / drivers / media / platform / davinci / vpbe_display.c
blob04609cc6eba70a3a5ad40c04a01a4308bccb8403
1 /*
2 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation version 2.
7 *
8 * This program is distributed WITHOUT ANY WARRANTY of any
9 * kind, whether express or implied; without even the implied warranty
10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/errno.h>
17 #include <linux/interrupt.h>
18 #include <linux/string.h>
19 #include <linux/wait.h>
20 #include <linux/time.h>
21 #include <linux/platform_device.h>
22 #include <linux/irq.h>
23 #include <linux/mm.h>
24 #include <linux/mutex.h>
25 #include <linux/videodev2.h>
26 #include <linux/slab.h>
27
28 #include <asm/pgtable.h>
29 #include <mach/cputype.h>
30
31 #include <media/v4l2-dev.h>
32 #include <media/v4l2-common.h>
33 #include <media/v4l2-ioctl.h>
34 #include <media/v4l2-device.h>
35 #include <media/davinci/vpbe_display.h>
36 #include <media/davinci/vpbe_types.h>
37 #include <media/davinci/vpbe.h>
38 #include <media/davinci/vpbe_venc.h>
39 #include <media/davinci/vpbe_osd.h>
40 #include "vpbe_venc_regs.h"
41
42 #define VPBE_DISPLAY_DRIVER "vpbe-v4l2"
43
44 static int debug;
45
46 #define VPBE_DEFAULT_NUM_BUFS 3
47
48 module_param(debug, int, 0644);
49
50 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
51 struct vpbe_layer *layer);
52
53 static int venc_is_second_field(struct vpbe_display *disp_dev)
54 {
55 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
56 int ret;
57 int val;
58
59 ret = v4l2_subdev_call(vpbe_dev->venc,
60 core,
61 ioctl,
62 VENC_GET_FLD,
63 &val);
64 if (ret < 0) {
65 v4l2_err(&vpbe_dev->v4l2_dev,
66 "Error in getting Field ID 0\n");
67 }
68 return val;
69 }
70
71 static void vpbe_isr_even_field(struct vpbe_display *disp_obj,
72 struct vpbe_layer *layer)
73 {
74 struct timespec timevalue;
75
76 if (layer->cur_frm == layer->next_frm)
77 return;
78 ktime_get_ts(&timevalue);
79 layer->cur_frm->vb.v4l2_buf.timestamp.tv_sec =
80 timevalue.tv_sec;
81 layer->cur_frm->vb.v4l2_buf.timestamp.tv_usec =
82 timevalue.tv_nsec / NSEC_PER_USEC;
83 vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_DONE);
84 /* Make cur_frm pointing to next_frm */
85 layer->cur_frm = layer->next_frm;
86 }
87
88 static void vpbe_isr_odd_field(struct vpbe_display *disp_obj,
89 struct vpbe_layer *layer)
90 {
91 struct osd_state *osd_device = disp_obj->osd_device;
92 unsigned long addr;
93
94 spin_lock(&disp_obj->dma_queue_lock);
95 if (list_empty(&layer->dma_queue) ||
96 (layer->cur_frm != layer->next_frm)) {
97 spin_unlock(&disp_obj->dma_queue_lock);
98 return;
99 }
100 /*
101 * one field is displayed configure
102 * the next frame if it is available
103 * otherwise hold on current frame
104 * Get next from the buffer queue
105 */
106 layer->next_frm = list_entry(layer->dma_queue.next,
107 struct vpbe_disp_buffer, list);
108 /* Remove that from the buffer queue */
109 list_del(&layer->next_frm->list);
110 spin_unlock(&disp_obj->dma_queue_lock);
111 /* Mark state of the frame to active */
112 layer->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
113 addr = vb2_dma_contig_plane_dma_addr(&layer->next_frm->vb, 0);
114 osd_device->ops.start_layer(osd_device,
115 layer->layer_info.id,
116 addr,
117 disp_obj->cbcr_ofst);
118 }
119
120 /* interrupt service routine */
121 static irqreturn_t venc_isr(int irq, void *arg)
122 {
123 struct vpbe_display *disp_dev = (struct vpbe_display *)arg;
124 struct vpbe_layer *layer;
125 static unsigned last_event;
126 unsigned event = 0;
127 int fid;
128 int i;
129
130 if ((NULL == arg) || (NULL == disp_dev->dev[0]))
131 return IRQ_HANDLED;
132
133 if (venc_is_second_field(disp_dev))
134 event |= VENC_SECOND_FIELD;
135 else
136 event |= VENC_FIRST_FIELD;
137
138 if (event == (last_event & ~VENC_END_OF_FRAME)) {
139 /*
140 * If the display is non-interlaced, then we need to flag the
141 * end-of-frame event at every interrupt regardless of the
142 * value of the FIDST bit. We can conclude that the display is
143 * non-interlaced if the value of the FIDST bit is unchanged
144 * from the previous interrupt.
145 */
146 event |= VENC_END_OF_FRAME;
147 } else if (event == VENC_SECOND_FIELD) {
148 /* end-of-frame for interlaced display */
149 event |= VENC_END_OF_FRAME;
150 }
151 last_event = event;
152
153 for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
154 layer = disp_dev->dev[i];
155 /* If streaming is started in this layer */
156 if (!layer->started)
157 continue;
158
159 if (layer->layer_first_int) {
160 layer->layer_first_int = 0;
161 continue;
162 }
163 /* Check the field format */
164 if ((V4L2_FIELD_NONE == layer->pix_fmt.field) &&
165 (event & VENC_END_OF_FRAME)) {
166 /* Progressive mode */
167
168 vpbe_isr_even_field(disp_dev, layer);
169 vpbe_isr_odd_field(disp_dev, layer);
170 } else {
171 /* Interlaced mode */
172
173 layer->field_id ^= 1;
174 if (event & VENC_FIRST_FIELD)
175 fid = 0;
176 else
177 fid = 1;
178
179 /*
180 * If field id does not match with store
181 * field id
182 */
183 if (fid != layer->field_id) {
184 /* Make them in sync */
185 layer->field_id = fid;
186 continue;
187 }
188 /*
189 * device field id and local field id are
190 * in sync. If this is even field
191 */
192 if (0 == fid)
193 vpbe_isr_even_field(disp_dev, layer);
194 else /* odd field */
195 vpbe_isr_odd_field(disp_dev, layer);
196 }
197 }
198
199 return IRQ_HANDLED;
200 }
201
202 /*
203 * vpbe_buffer_prepare()
204 * This is the callback function called from vb2_qbuf() function
205 * the buffer is prepared and user space virtual address is converted into
206 * physical address
207 */
208 static int vpbe_buffer_prepare(struct vb2_buffer *vb)
209 {
210 struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
211 struct vb2_queue *q = vb->vb2_queue;
212 struct vpbe_layer *layer = fh->layer;
213 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
214 unsigned long addr;
215
216 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
217 "vpbe_buffer_prepare\n");
218
219 if (vb->state != VB2_BUF_STATE_ACTIVE &&
220 vb->state != VB2_BUF_STATE_PREPARED) {
221 vb2_set_plane_payload(vb, 0, layer->pix_fmt.sizeimage);
222 if (vb2_plane_vaddr(vb, 0) &&
223 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
224 return -EINVAL;
225
226 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
227 if (q->streaming) {
228 if (!IS_ALIGNED(addr, 8)) {
229 v4l2_err(&vpbe_dev->v4l2_dev,
230 "buffer_prepare:offset is \
231 not aligned to 32 bytes\n");
232 return -EINVAL;
233 }
234 }
235 }
236 return 0;
237 }
238
239 /*
240 * vpbe_buffer_setup()
241 * This function allocates memory for the buffers
242 */
243 static int
244 vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
245 unsigned int *nbuffers, unsigned int *nplanes,
246 unsigned int sizes[], void *alloc_ctxs[])
247
248 {
249 /* Get the file handle object and layer object */
250 struct vpbe_fh *fh = vb2_get_drv_priv(vq);
251 struct vpbe_layer *layer = fh->layer;
252 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
253
254 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
255
256 /* Store number of buffers allocated in numbuffer member */
257 if (*nbuffers < VPBE_DEFAULT_NUM_BUFS)
258 *nbuffers = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
259
260 *nplanes = 1;
261 sizes[0] = layer->pix_fmt.sizeimage;
262 alloc_ctxs[0] = layer->alloc_ctx;
263
264 return 0;
265 }
266
267 /*
268 * vpbe_buffer_queue()
269 * This function adds the buffer to DMA queue
270 */
271 static void vpbe_buffer_queue(struct vb2_buffer *vb)
272 {
273 /* Get the file handle object and layer object */
274 struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
275 struct vpbe_disp_buffer *buf = container_of(vb,
276 struct vpbe_disp_buffer, vb);
277 struct vpbe_layer *layer = fh->layer;
278 struct vpbe_display *disp = fh->disp_dev;
279 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
280 unsigned long flags;
281
282 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
283 "vpbe_buffer_queue\n");
284
285 /* add the buffer to the DMA queue */
286 spin_lock_irqsave(&disp->dma_queue_lock, flags);
287 list_add_tail(&buf->list, &layer->dma_queue);
288 spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
289 }
290
291 /*
292 * vpbe_buf_cleanup()
293 * This function is called from the vb2 layer to free memory allocated to
294 * the buffers
295 */
296 static void vpbe_buf_cleanup(struct vb2_buffer *vb)
297 {
298 /* Get the file handle object and layer object */
299 struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
300 struct vpbe_layer *layer = fh->layer;
301 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
302 struct vpbe_disp_buffer *buf = container_of(vb,
303 struct vpbe_disp_buffer, vb);
304 unsigned long flags;
305
306 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
307 "vpbe_buf_cleanup\n");
308
309 spin_lock_irqsave(&layer->irqlock, flags);
310 if (vb->state == VB2_BUF_STATE_ACTIVE)
311 list_del_init(&buf->list);
312 spin_unlock_irqrestore(&layer->irqlock, flags);
313 }
314
315 static void vpbe_wait_prepare(struct vb2_queue *vq)
316 {
317 struct vpbe_fh *fh = vb2_get_drv_priv(vq);
318 struct vpbe_layer *layer = fh->layer;
319
320 mutex_unlock(&layer->opslock);
321 }
322
323 static void vpbe_wait_finish(struct vb2_queue *vq)
324 {
325 struct vpbe_fh *fh = vb2_get_drv_priv(vq);
326 struct vpbe_layer *layer = fh->layer;
327
328 mutex_lock(&layer->opslock);
329 }
330
331 static int vpbe_buffer_init(struct vb2_buffer *vb)
332 {
333 struct vpbe_disp_buffer *buf = container_of(vb,
334 struct vpbe_disp_buffer, vb);
335
336 INIT_LIST_HEAD(&buf->list);
337 return 0;
338 }
339
340 static int vpbe_start_streaming(struct vb2_queue *vq, unsigned int count)
341 {
342 struct vpbe_fh *fh = vb2_get_drv_priv(vq);
343 struct vpbe_layer *layer = fh->layer;
344 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
345 int ret;
346
347 /* If buffer queue is empty, return error */
348 if (list_empty(&layer->dma_queue)) {
349 v4l2_err(&vpbe_dev->v4l2_dev, "buffer queue is empty\n");
350 return -EINVAL;
351 }
352 /* Get the next frame from the buffer queue */
353 layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
354 struct vpbe_disp_buffer, list);
355 /* Remove buffer from the buffer queue */
356 list_del(&layer->cur_frm->list);
357 /* Mark state of the current frame to active */
358 layer->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
359 /* Initialize field_id and started member */
360 layer->field_id = 0;
361
362 /* Set parameters in OSD and VENC */
363 ret = vpbe_set_osd_display_params(fh->disp_dev, layer);
364 if (ret < 0)
365 return ret;
366
367 /*
368 * if request format is yuv420 semiplanar, need to
369 * enable both video windows
370 */
371 layer->started = 1;
372 layer->layer_first_int = 1;
373
374 return ret;
375 }
376
377 static int vpbe_stop_streaming(struct vb2_queue *vq)
378 {
379 struct vpbe_fh *fh = vb2_get_drv_priv(vq);
380 struct vpbe_layer *layer = fh->layer;
381
382 if (!vb2_is_streaming(vq))
383 return 0;
384
385 /* release all active buffers */
386 while (!list_empty(&layer->dma_queue)) {
387 layer->next_frm = list_entry(layer->dma_queue.next,
388 struct vpbe_disp_buffer, list);
389 list_del(&layer->next_frm->list);
390 vb2_buffer_done(&layer->next_frm->vb, VB2_BUF_STATE_ERROR);
391 }
392
393 return 0;
394 }
395
396 static struct vb2_ops video_qops = {
397 .queue_setup = vpbe_buffer_queue_setup,
398 .wait_prepare = vpbe_wait_prepare,
399 .wait_finish = vpbe_wait_finish,
400 .buf_init = vpbe_buffer_init,
401 .buf_prepare = vpbe_buffer_prepare,
402 .start_streaming = vpbe_start_streaming,
403 .stop_streaming = vpbe_stop_streaming,
404 .buf_cleanup = vpbe_buf_cleanup,
405 .buf_queue = vpbe_buffer_queue,
406 };
407
408 static
409 struct vpbe_layer*
410 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
411 struct vpbe_layer *layer)
412 {
413 enum vpbe_display_device_id thiswin, otherwin;
414 thiswin = layer->device_id;
415
416 otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
417 VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
418 return disp_dev->dev[otherwin];
419 }
420
421 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
422 struct vpbe_layer *layer)
423 {
424 struct osd_layer_config *cfg = &layer->layer_info.config;
425 struct osd_state *osd_device = disp_dev->osd_device;
426 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
427 unsigned long addr;
428 int ret;
429
430 addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb, 0);
431 /* Set address in the display registers */
432 osd_device->ops.start_layer(osd_device,
433 layer->layer_info.id,
434 addr,
435 disp_dev->cbcr_ofst);
436
437 ret = osd_device->ops.enable_layer(osd_device,
438 layer->layer_info.id, 0);
439 if (ret < 0) {
440 v4l2_err(&vpbe_dev->v4l2_dev,
441 "Error in enabling osd window layer 0\n");
442 return -1;
443 }
444
445 /* Enable the window */
446 layer->layer_info.enable = 1;
447 if (cfg->pixfmt == PIXFMT_NV12) {
448 struct vpbe_layer *otherlayer =
449 _vpbe_display_get_other_win_layer(disp_dev, layer);
450
451 ret = osd_device->ops.enable_layer(osd_device,
452 otherlayer->layer_info.id, 1);
453 if (ret < 0) {
454 v4l2_err(&vpbe_dev->v4l2_dev,
455 "Error in enabling osd window layer 1\n");
456 return -1;
457 }
458 otherlayer->layer_info.enable = 1;
459 }
460 return 0;
461 }
462
463 static void
464 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
465 struct vpbe_layer *layer,
466 int expected_xsize, int expected_ysize)
467 {
468 struct display_layer_info *layer_info = &layer->layer_info;
469 struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
470 struct osd_layer_config *cfg = &layer->layer_info.config;
471 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
472 int calculated_xsize;
473 int h_exp = 0;
474 int v_exp = 0;
475 int h_scale;
476 int v_scale;
477
478 v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
479
480 /*
481 * Application initially set the image format. Current display
482 * size is obtained from the vpbe display controller. expected_xsize
483 * and expected_ysize are set through S_CROP ioctl. Based on this,
484 * driver will calculate the scale factors for vertical and
485 * horizontal direction so that the image is displayed scaled
486 * and expanded. Application uses expansion to display the image
487 * in a square pixel. Otherwise it is displayed using displays
488 * pixel aspect ratio.It is expected that application chooses
489 * the crop coordinates for cropped or scaled display. if crop
490 * size is less than the image size, it is displayed cropped or
491 * it is displayed scaled and/or expanded.
492 *
493 * to begin with, set the crop window same as expected. Later we
494 * will override with scaled window size
495 */
496
497 cfg->xsize = pixfmt->width;
498 cfg->ysize = pixfmt->height;
499 layer_info->h_zoom = ZOOM_X1; /* no horizontal zoom */
500 layer_info->v_zoom = ZOOM_X1; /* no horizontal zoom */
501 layer_info->h_exp = H_EXP_OFF; /* no horizontal zoom */
502 layer_info->v_exp = V_EXP_OFF; /* no horizontal zoom */
503
504 if (pixfmt->width < expected_xsize) {
505 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
506 if (h_scale < 2)
507 h_scale = 1;
508 else if (h_scale >= 4)
509 h_scale = 4;
510 else
511 h_scale = 2;
512 cfg->xsize *= h_scale;
513 if (cfg->xsize < expected_xsize) {
514 if ((standard_id & V4L2_STD_525_60) ||
515 (standard_id & V4L2_STD_625_50)) {
516 calculated_xsize = (cfg->xsize *
517 VPBE_DISPLAY_H_EXP_RATIO_N) /
518 VPBE_DISPLAY_H_EXP_RATIO_D;
519 if (calculated_xsize <= expected_xsize) {
520 h_exp = 1;
521 cfg->xsize = calculated_xsize;
522 }
523 }
524 }
525 if (h_scale == 2)
526 layer_info->h_zoom = ZOOM_X2;
527 else if (h_scale == 4)
528 layer_info->h_zoom = ZOOM_X4;
529 if (h_exp)
530 layer_info->h_exp = H_EXP_9_OVER_8;
531 } else {
532 /* no scaling, only cropping. Set display area to crop area */
533 cfg->xsize = expected_xsize;
534 }
535
536 if (pixfmt->height < expected_ysize) {
537 v_scale = expected_ysize / pixfmt->height;
538 if (v_scale < 2)
539 v_scale = 1;
540 else if (v_scale >= 4)
541 v_scale = 4;
542 else
543 v_scale = 2;
544 cfg->ysize *= v_scale;
545 if (cfg->ysize < expected_ysize) {
546 if ((standard_id & V4L2_STD_625_50)) {
547 calculated_xsize = (cfg->ysize *
548 VPBE_DISPLAY_V_EXP_RATIO_N) /
549 VPBE_DISPLAY_V_EXP_RATIO_D;
550 if (calculated_xsize <= expected_ysize) {
551 v_exp = 1;
552 cfg->ysize = calculated_xsize;
553 }
554 }
555 }
556 if (v_scale == 2)
557 layer_info->v_zoom = ZOOM_X2;
558 else if (v_scale == 4)
559 layer_info->v_zoom = ZOOM_X4;
560 if (v_exp)
561 layer_info->h_exp = V_EXP_6_OVER_5;
562 } else {
563 /* no scaling, only cropping. Set display area to crop area */
564 cfg->ysize = expected_ysize;
565 }
566 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
567 "crop display xsize = %d, ysize = %d\n",
568 cfg->xsize, cfg->ysize);
569 }
570
571 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
572 struct vpbe_layer *layer,
573 int top, int left)
574 {
575 struct osd_layer_config *cfg = &layer->layer_info.config;
576 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
577
578 cfg->xpos = min((unsigned int)left,
579 vpbe_dev->current_timings.xres - cfg->xsize);
580 cfg->ypos = min((unsigned int)top,
581 vpbe_dev->current_timings.yres - cfg->ysize);
582
583 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
584 "new xpos = %d, ypos = %d\n",
585 cfg->xpos, cfg->ypos);
586 }
587
588 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
589 struct v4l2_rect *c)
590 {
591 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
592
593 if ((c->width == 0) ||
594 ((c->width + c->left) > vpbe_dev->current_timings.xres))
595 c->width = vpbe_dev->current_timings.xres - c->left;
596
597 if ((c->height == 0) || ((c->height + c->top) >
598 vpbe_dev->current_timings.yres))
599 c->height = vpbe_dev->current_timings.yres - c->top;
600
601 /* window height must be even for interlaced display */
602 if (vpbe_dev->current_timings.interlaced)
603 c->height &= (~0x01);
604
605 }
606
607 /**
608 * vpbe_try_format()
609 * If user application provides width and height, and have bytesperline set
610 * to zero, driver calculates bytesperline and sizeimage based on hardware
611 * limits.
612 */
613 static int vpbe_try_format(struct vpbe_display *disp_dev,
614 struct v4l2_pix_format *pixfmt, int check)
615 {
616 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
617 int min_height = 1;
618 int min_width = 32;
619 int max_height;
620 int max_width;
621 int bpp;
622
623 if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
624 (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
625 /* choose default as V4L2_PIX_FMT_UYVY */
626 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
627
628 /* Check the field format */
629 if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
630 (pixfmt->field != V4L2_FIELD_NONE)) {
631 if (vpbe_dev->current_timings.interlaced)
632 pixfmt->field = V4L2_FIELD_INTERLACED;
633 else
634 pixfmt->field = V4L2_FIELD_NONE;
635 }
636
637 if (pixfmt->field == V4L2_FIELD_INTERLACED)
638 min_height = 2;
639
640 if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
641 bpp = 1;
642 else
643 bpp = 2;
644
645 max_width = vpbe_dev->current_timings.xres;
646 max_height = vpbe_dev->current_timings.yres;
647
648 min_width /= bpp;
649
650 if (!pixfmt->width || (pixfmt->width < min_width) ||
651 (pixfmt->width > max_width)) {
652 pixfmt->width = vpbe_dev->current_timings.xres;
653 }
654
655 if (!pixfmt->height || (pixfmt->height < min_height) ||
656 (pixfmt->height > max_height)) {
657 pixfmt->height = vpbe_dev->current_timings.yres;
658 }
659
660 if (pixfmt->bytesperline < (pixfmt->width * bpp))
661 pixfmt->bytesperline = pixfmt->width * bpp;
662
663 /* Make the bytesperline 32 byte aligned */
664 pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
665
666 if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
667 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
668 (pixfmt->bytesperline * pixfmt->height >> 1);
669 else
670 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
671
672 return 0;
673 }
674
675 static int vpbe_display_g_priority(struct file *file, void *priv,
676 enum v4l2_priority *p)
677 {
678 struct vpbe_fh *fh = file->private_data;
679 struct vpbe_layer *layer = fh->layer;
680
681 *p = v4l2_prio_max(&layer->prio);
682
683 return 0;
684 }
685
686 static int vpbe_display_s_priority(struct file *file, void *priv,
687 enum v4l2_priority p)
688 {
689 struct vpbe_fh *fh = file->private_data;
690 struct vpbe_layer *layer = fh->layer;
691 int ret;
692
693 ret = v4l2_prio_change(&layer->prio, &fh->prio, p);
694
695 return ret;
696 }
697
698 static int vpbe_display_querycap(struct file *file, void *priv,
699 struct v4l2_capability *cap)
700 {
701 struct vpbe_fh *fh = file->private_data;
702 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
703
704 cap->version = VPBE_DISPLAY_VERSION_CODE;
705 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
706 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
707 snprintf(cap->driver, sizeof(cap->driver), "%s",
708 dev_name(vpbe_dev->pdev));
709 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
710 dev_name(vpbe_dev->pdev));
711 strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
712
713 return 0;
714 }
715
716 static int vpbe_display_s_crop(struct file *file, void *priv,
717 const struct v4l2_crop *crop)
718 {
719 struct vpbe_fh *fh = file->private_data;
720 struct vpbe_layer *layer = fh->layer;
721 struct vpbe_display *disp_dev = fh->disp_dev;
722 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
723 struct osd_layer_config *cfg = &layer->layer_info.config;
724 struct osd_state *osd_device = disp_dev->osd_device;
725 struct v4l2_rect rect = crop->c;
726 int ret;
727
728 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
729 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
730
731 if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
732 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
733 return -EINVAL;
734 }
735
736 if (rect.top < 0)
737 rect.top = 0;
738 if (rect.left < 0)
739 rect.left = 0;
740
741 vpbe_disp_check_window_params(disp_dev, &rect);
742
743 osd_device->ops.get_layer_config(osd_device,
744 layer->layer_info.id, cfg);
745
746 vpbe_disp_calculate_scale_factor(disp_dev, layer,
747 rect.width,
748 rect.height);
749 vpbe_disp_adj_position(disp_dev, layer, rect.top,
750 rect.left);
751 ret = osd_device->ops.set_layer_config(osd_device,
752 layer->layer_info.id, cfg);
753 if (ret < 0) {
754 v4l2_err(&vpbe_dev->v4l2_dev,
755 "Error in set layer config:\n");
756 return -EINVAL;
757 }
758
759 /* apply zooming and h or v expansion */
760 osd_device->ops.set_zoom(osd_device,
761 layer->layer_info.id,
762 layer->layer_info.h_zoom,
763 layer->layer_info.v_zoom);
764 ret = osd_device->ops.set_vid_expansion(osd_device,
765 layer->layer_info.h_exp,
766 layer->layer_info.v_exp);
767 if (ret < 0) {
768 v4l2_err(&vpbe_dev->v4l2_dev,
769 "Error in set vid expansion:\n");
770 return -EINVAL;
771 }
772
773 if ((layer->layer_info.h_zoom != ZOOM_X1) ||
774 (layer->layer_info.v_zoom != ZOOM_X1) ||
775 (layer->layer_info.h_exp != H_EXP_OFF) ||
776 (layer->layer_info.v_exp != V_EXP_OFF))
777 /* Enable expansion filter */
778 osd_device->ops.set_interpolation_filter(osd_device, 1);
779 else
780 osd_device->ops.set_interpolation_filter(osd_device, 0);
781
782 return 0;
783 }
784
785 static int vpbe_display_g_crop(struct file *file, void *priv,
786 struct v4l2_crop *crop)
787 {
788 struct vpbe_fh *fh = file->private_data;
789 struct vpbe_layer *layer = fh->layer;
790 struct osd_layer_config *cfg = &layer->layer_info.config;
791 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
792 struct osd_state *osd_device = fh->disp_dev->osd_device;
793 struct v4l2_rect *rect = &crop->c;
794
795 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
796 "VIDIOC_G_CROP, layer id = %d\n",
797 layer->device_id);
798
799 if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
800 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
801 return -EINVAL;
802 }
803 osd_device->ops.get_layer_config(osd_device,
804 layer->layer_info.id, cfg);
805 rect->top = cfg->ypos;
806 rect->left = cfg->xpos;
807 rect->width = cfg->xsize;
808 rect->height = cfg->ysize;
809
810 return 0;
811 }
812
813 static int vpbe_display_cropcap(struct file *file, void *priv,
814 struct v4l2_cropcap *cropcap)
815 {
816 struct vpbe_fh *fh = file->private_data;
817 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
818
819 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
820
821 cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
822 cropcap->bounds.left = 0;
823 cropcap->bounds.top = 0;
824 cropcap->bounds.width = vpbe_dev->current_timings.xres;
825 cropcap->bounds.height = vpbe_dev->current_timings.yres;
826 cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
827 cropcap->defrect = cropcap->bounds;
828 return 0;
829 }
830
831 static int vpbe_display_g_fmt(struct file *file, void *priv,
832 struct v4l2_format *fmt)
833 {
834 struct vpbe_fh *fh = file->private_data;
835 struct vpbe_layer *layer = fh->layer;
836 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
837
838 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
839 "VIDIOC_G_FMT, layer id = %d\n",
840 layer->device_id);
841
842 /* If buffer type is video output */
843 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
844 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
845 return -EINVAL;
846 }
847 /* Fill in the information about format */
848 fmt->fmt.pix = layer->pix_fmt;
849
850 return 0;
851 }
852
853 static int vpbe_display_enum_fmt(struct file *file, void *priv,
854 struct v4l2_fmtdesc *fmt)
855 {
856 struct vpbe_fh *fh = file->private_data;
857 struct vpbe_layer *layer = fh->layer;
858 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
859 unsigned int index = 0;
860
861 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
862 "VIDIOC_ENUM_FMT, layer id = %d\n",
863 layer->device_id);
864 if (fmt->index > 1) {
865 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
866 return -EINVAL;
867 }
868
869 /* Fill in the information about format */
870 index = fmt->index;
871 memset(fmt, 0, sizeof(*fmt));
872 fmt->index = index;
873 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
874 if (index == 0) {
875 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
876 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
877 } else {
878 strcpy(fmt->description, "Y/CbCr 4:2:0");
879 fmt->pixelformat = V4L2_PIX_FMT_NV12;
880 }
881
882 return 0;
883 }
884
885 static int vpbe_display_s_fmt(struct file *file, void *priv,
886 struct v4l2_format *fmt)
887 {
888 struct vpbe_fh *fh = file->private_data;
889 struct vpbe_layer *layer = fh->layer;
890 struct vpbe_display *disp_dev = fh->disp_dev;
891 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
892 struct osd_layer_config *cfg = &layer->layer_info.config;
893 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
894 struct osd_state *osd_device = disp_dev->osd_device;
895 int ret;
896
897 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
898 "VIDIOC_S_FMT, layer id = %d\n",
899 layer->device_id);
900
901 /* If streaming is started, return error */
902 if (layer->started) {
903 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
904 return -EBUSY;
905 }
906 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
907 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
908 return -EINVAL;
909 }
910 /* Check for valid pixel format */
911 ret = vpbe_try_format(disp_dev, pixfmt, 1);
912 if (ret)
913 return ret;
914
915 /* YUV420 is requested, check availability of the
916 other video window */
917
918 layer->pix_fmt = *pixfmt;
919 if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12) {
920 struct vpbe_layer *otherlayer;
921
922 otherlayer = _vpbe_display_get_other_win_layer(disp_dev, layer);
923 /* if other layer is available, only
924 * claim it, do not configure it
925 */
926 ret = osd_device->ops.request_layer(osd_device,
927 otherlayer->layer_info.id);
928 if (ret < 0) {
929 v4l2_err(&vpbe_dev->v4l2_dev,
930 "Display Manager failed to allocate layer\n");
931 return -EBUSY;
932 }
933 }
934
935 /* Get osd layer config */
936 osd_device->ops.get_layer_config(osd_device,
937 layer->layer_info.id, cfg);
938 /* Store the pixel format in the layer object */
939 cfg->xsize = pixfmt->width;
940 cfg->ysize = pixfmt->height;
941 cfg->line_length = pixfmt->bytesperline;
942 cfg->ypos = 0;
943 cfg->xpos = 0;
944 cfg->interlaced = vpbe_dev->current_timings.interlaced;
945
946 if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
947 cfg->pixfmt = PIXFMT_YCBCRI;
948
949 /* Change of the default pixel format for both video windows */
950 if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
951 struct vpbe_layer *otherlayer;
952 cfg->pixfmt = PIXFMT_NV12;
953 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
954 layer);
955 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
956 }
957
958 /* Set the layer config in the osd window */
959 ret = osd_device->ops.set_layer_config(osd_device,
960 layer->layer_info.id, cfg);
961 if (ret < 0) {
962 v4l2_err(&vpbe_dev->v4l2_dev,
963 "Error in S_FMT params:\n");
964 return -EINVAL;
965 }
966
967 /* Readback and fill the local copy of current pix format */
968 osd_device->ops.get_layer_config(osd_device,
969 layer->layer_info.id, cfg);
970
971 return 0;
972 }
973
974 static int vpbe_display_try_fmt(struct file *file, void *priv,
975 struct v4l2_format *fmt)
976 {
977 struct vpbe_fh *fh = file->private_data;
978 struct vpbe_display *disp_dev = fh->disp_dev;
979 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
980 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
981
982 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
983
984 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
985 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
986 return -EINVAL;
987 }
988
989 /* Check for valid field format */
990 return vpbe_try_format(disp_dev, pixfmt, 0);
991
992 }
993
994 /**
995 * vpbe_display_s_std - Set the given standard in the encoder
996 *
997 * Sets the standard if supported by the current encoder. Return the status.
998 * 0 - success & -EINVAL on error
999 */
1000 static int vpbe_display_s_std(struct file *file, void *priv,
1001 v4l2_std_id std_id)
1002 {
1003 struct vpbe_fh *fh = priv;
1004 struct vpbe_layer *layer = fh->layer;
1005 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1006 int ret;
1007
1008 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
1009
1010 /* If streaming is started, return error */
1011 if (layer->started) {
1012 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1013 return -EBUSY;
1014 }
1015 if (NULL != vpbe_dev->ops.s_std) {
1016 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
1017 if (ret) {
1018 v4l2_err(&vpbe_dev->v4l2_dev,
1019 "Failed to set standard for sub devices\n");
1020 return -EINVAL;
1021 }
1022 } else {
1023 return -EINVAL;
1024 }
1025
1026 return 0;
1027 }
1028
1029 /**
1030 * vpbe_display_g_std - Get the standard in the current encoder
1031 *
1032 * Get the standard in the current encoder. Return the status. 0 - success
1033 * -EINVAL on error
1034 */
1035 static int vpbe_display_g_std(struct file *file, void *priv,
1036 v4l2_std_id *std_id)
1037 {
1038 struct vpbe_fh *fh = priv;
1039 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1040
1041 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
1042
1043 /* Get the standard from the current encoder */
1044 if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
1045 *std_id = vpbe_dev->current_timings.std_id;
1046 return 0;
1047 }
1048
1049 return -EINVAL;
1050 }
1051
1052 /**
1053 * vpbe_display_enum_output - enumerate outputs
1054 *
1055 * Enumerates the outputs available at the vpbe display
1056 * returns the status, -EINVAL if end of output list
1057 */
1058 static int vpbe_display_enum_output(struct file *file, void *priv,
1059 struct v4l2_output *output)
1060 {
1061 struct vpbe_fh *fh = priv;
1062 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1063 int ret;
1064
1065 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
1066
1067 /* Enumerate outputs */
1068
1069 if (NULL == vpbe_dev->ops.enum_outputs)
1070 return -EINVAL;
1071
1072 ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
1073 if (ret) {
1074 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1075 "Failed to enumerate outputs\n");
1076 return -EINVAL;
1077 }
1078
1079 return 0;
1080 }
1081
1082 /**
1083 * vpbe_display_s_output - Set output to
1084 * the output specified by the index
1085 */
1086 static int vpbe_display_s_output(struct file *file, void *priv,
1087 unsigned int i)
1088 {
1089 struct vpbe_fh *fh = priv;
1090 struct vpbe_layer *layer = fh->layer;
1091 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1092 int ret;
1093
1094 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1095 /* If streaming is started, return error */
1096 if (layer->started) {
1097 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1098 return -EBUSY;
1099 }
1100 if (NULL == vpbe_dev->ops.set_output)
1101 return -EINVAL;
1102
1103 ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1104 if (ret) {
1105 v4l2_err(&vpbe_dev->v4l2_dev,
1106 "Failed to set output for sub devices\n");
1107 return -EINVAL;
1108 }
1109
1110 return 0;
1111 }
1112
1113 /**
1114 * vpbe_display_g_output - Get output from subdevice
1115 * for a given by the index
1116 */
1117 static int vpbe_display_g_output(struct file *file, void *priv,
1118 unsigned int *i)
1119 {
1120 struct vpbe_fh *fh = priv;
1121 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1122
1123 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1124 /* Get the standard from the current encoder */
1125 *i = vpbe_dev->current_out_index;
1126
1127 return 0;
1128 }
1129
1130 /**
1131 * vpbe_display_enum_dv_timings - Enumerate the dv timings
1132 *
1133 * enum the timings in the current encoder. Return the status. 0 - success
1134 * -EINVAL on error
1135 */
1136 static int
1137 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1138 struct v4l2_enum_dv_timings *timings)
1139 {
1140 struct vpbe_fh *fh = priv;
1141 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1142 int ret;
1143
1144 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1145
1146 /* Enumerate outputs */
1147 if (NULL == vpbe_dev->ops.enum_dv_timings)
1148 return -EINVAL;
1149
1150 ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1151 if (ret) {
1152 v4l2_err(&vpbe_dev->v4l2_dev,
1153 "Failed to enumerate dv timings info\n");
1154 return -EINVAL;
1155 }
1156
1157 return 0;
1158 }
1159
1160 /**
1161 * vpbe_display_s_dv_timings - Set the dv timings
1162 *
1163 * Set the timings in the current encoder. Return the status. 0 - success
1164 * -EINVAL on error
1165 */
1166 static int
1167 vpbe_display_s_dv_timings(struct file *file, void *priv,
1168 struct v4l2_dv_timings *timings)
1169 {
1170 struct vpbe_fh *fh = priv;
1171 struct vpbe_layer *layer = fh->layer;
1172 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1173 int ret;
1174
1175 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1176
1177
1178 /* If streaming is started, return error */
1179 if (layer->started) {
1180 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1181 return -EBUSY;
1182 }
1183
1184 /* Set the given standard in the encoder */
1185 if (!vpbe_dev->ops.s_dv_timings)
1186 return -EINVAL;
1187
1188 ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1189 if (ret) {
1190 v4l2_err(&vpbe_dev->v4l2_dev,
1191 "Failed to set the dv timings info\n");
1192 return -EINVAL;
1193 }
1194
1195 return 0;
1196 }
1197
1198 /**
1199 * vpbe_display_g_dv_timings - Set the dv timings
1200 *
1201 * Get the timings in the current encoder. Return the status. 0 - success
1202 * -EINVAL on error
1203 */
1204 static int
1205 vpbe_display_g_dv_timings(struct file *file, void *priv,
1206 struct v4l2_dv_timings *dv_timings)
1207 {
1208 struct vpbe_fh *fh = priv;
1209 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1210
1211 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1212
1213 /* Get the given standard in the encoder */
1214
1215 if (vpbe_dev->current_timings.timings_type &
1216 VPBE_ENC_DV_TIMINGS) {
1217 *dv_timings = vpbe_dev->current_timings.dv_timings;
1218 } else {
1219 return -EINVAL;
1220 }
1221
1222 return 0;
1223 }
1224
1225 static int vpbe_display_streamoff(struct file *file, void *priv,
1226 enum v4l2_buf_type buf_type)
1227 {
1228 struct vpbe_fh *fh = file->private_data;
1229 struct vpbe_layer *layer = fh->layer;
1230 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1231 struct osd_state *osd_device = fh->disp_dev->osd_device;
1232 int ret;
1233
1234 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1235 "VIDIOC_STREAMOFF,layer id = %d\n",
1236 layer->device_id);
1237
1238 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1239 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1240 return -EINVAL;
1241 }
1242
1243 /* If io is allowed for this file handle, return error */
1244 if (!fh->io_allowed) {
1245 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1246 return -EACCES;
1247 }
1248
1249 /* If streaming is not started, return error */
1250 if (!layer->started) {
1251 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1252 " id = %d\n", layer->device_id);
1253 return -EINVAL;
1254 }
1255
1256 osd_device->ops.disable_layer(osd_device,
1257 layer->layer_info.id);
1258 layer->started = 0;
1259 ret = vb2_streamoff(&layer->buffer_queue, buf_type);
1260
1261 return ret;
1262 }
1263
1264 static int vpbe_display_streamon(struct file *file, void *priv,
1265 enum v4l2_buf_type buf_type)
1266 {
1267 struct vpbe_fh *fh = file->private_data;
1268 struct vpbe_layer *layer = fh->layer;
1269 struct vpbe_display *disp_dev = fh->disp_dev;
1270 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1271 struct osd_state *osd_device = disp_dev->osd_device;
1272 int ret;
1273
1274 osd_device->ops.disable_layer(osd_device,
1275 layer->layer_info.id);
1276
1277 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1278 layer->device_id);
1279
1280 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1281 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1282 return -EINVAL;
1283 }
1284
1285 /* If file handle is not allowed IO, return error */
1286 if (!fh->io_allowed) {
1287 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1288 return -EACCES;
1289 }
1290 /* If Streaming is already started, return error */
1291 if (layer->started) {
1292 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1293 return -EBUSY;
1294 }
1295
1296 /*
1297 * Call vb2_streamon to start streaming
1298 * in videobuf
1299 */
1300 ret = vb2_streamon(&layer->buffer_queue, buf_type);
1301 if (ret) {
1302 v4l2_err(&vpbe_dev->v4l2_dev,
1303 "error in vb2_streamon\n");
1304 return ret;
1305 }
1306 return ret;
1307 }
1308
1309 static int vpbe_display_dqbuf(struct file *file, void *priv,
1310 struct v4l2_buffer *buf)
1311 {
1312 struct vpbe_fh *fh = file->private_data;
1313 struct vpbe_layer *layer = fh->layer;
1314 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1315 int ret;
1316
1317 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1318 "VIDIOC_DQBUF, layer id = %d\n",
1319 layer->device_id);
1320
1321 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1322 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1323 return -EINVAL;
1324 }
1325 /* If this file handle is not allowed to do IO, return error */
1326 if (!fh->io_allowed) {
1327 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1328 return -EACCES;
1329 }
1330 if (file->f_flags & O_NONBLOCK)
1331 /* Call videobuf_dqbuf for non blocking mode */
1332 ret = vb2_dqbuf(&layer->buffer_queue, buf, 1);
1333 else
1334 /* Call videobuf_dqbuf for blocking mode */
1335 ret = vb2_dqbuf(&layer->buffer_queue, buf, 0);
1336
1337 return ret;
1338 }
1339
1340 static int vpbe_display_qbuf(struct file *file, void *priv,
1341 struct v4l2_buffer *p)
1342 {
1343 struct vpbe_fh *fh = file->private_data;
1344 struct vpbe_layer *layer = fh->layer;
1345 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1346
1347 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1348 "VIDIOC_QBUF, layer id = %d\n",
1349 layer->device_id);
1350
1351 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1352 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1353 return -EINVAL;
1354 }
1355
1356 /* If this file handle is not allowed to do IO, return error */
1357 if (!fh->io_allowed) {
1358 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1359 return -EACCES;
1360 }
1361
1362 return vb2_qbuf(&layer->buffer_queue, p);
1363 }
1364
1365 static int vpbe_display_querybuf(struct file *file, void *priv,
1366 struct v4l2_buffer *buf)
1367 {
1368 struct vpbe_fh *fh = file->private_data;
1369 struct vpbe_layer *layer = fh->layer;
1370 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1371
1372 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1373 "VIDIOC_QUERYBUF, layer id = %d\n",
1374 layer->device_id);
1375
1376 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1377 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1378 return -EINVAL;
1379 }
1380 /* Call vb2_querybuf to get information */
1381 return vb2_querybuf(&layer->buffer_queue, buf);
1382 }
1383
1384 static int vpbe_display_reqbufs(struct file *file, void *priv,
1385 struct v4l2_requestbuffers *req_buf)
1386 {
1387 struct vpbe_fh *fh = file->private_data;
1388 struct vpbe_layer *layer = fh->layer;
1389 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1390 struct vb2_queue *q;
1391 int ret;
1392 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1393
1394 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1395 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1396 return -EINVAL;
1397 }
1398
1399 /* If io users of the layer is not zero, return error */
1400 if (0 != layer->io_usrs) {
1401 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1402 return -EBUSY;
1403 }
1404 /* Initialize videobuf queue as per the buffer type */
1405 layer->alloc_ctx = vb2_dma_contig_init_ctx(vpbe_dev->pdev);
1406 if (IS_ERR(layer->alloc_ctx)) {
1407 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to get the context\n");
1408 return PTR_ERR(layer->alloc_ctx);
1409 }
1410 q = &layer->buffer_queue;
1411 memset(q, 0, sizeof(*q));
1412 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1413 q->io_modes = VB2_MMAP | VB2_USERPTR;
1414 q->drv_priv = fh;
1415 q->ops = &video_qops;
1416 q->mem_ops = &vb2_dma_contig_memops;
1417 q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1418 q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1419
1420 ret = vb2_queue_init(q);
1421 if (ret) {
1422 v4l2_err(&vpbe_dev->v4l2_dev, "vb2_queue_init() failed\n");
1423 vb2_dma_contig_cleanup_ctx(layer->alloc_ctx);
1424 return ret;
1425 }
1426 /* Set io allowed member of file handle to TRUE */
1427 fh->io_allowed = 1;
1428 /* Increment io usrs member of layer object to 1 */
1429 layer->io_usrs = 1;
1430 /* Store type of memory requested in layer object */
1431 layer->memory = req_buf->memory;
1432 /* Initialize buffer queue */
1433 INIT_LIST_HEAD(&layer->dma_queue);
1434 /* Allocate buffers */
1435 return vb2_reqbufs(q, req_buf);
1436 }
1437
1438 /*
1439 * vpbe_display_mmap()
1440 * It is used to map kernel space buffers into user spaces
1441 */
1442 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1443 {
1444 /* Get the layer object and file handle object */
1445 struct vpbe_fh *fh = filep->private_data;
1446 struct vpbe_layer *layer = fh->layer;
1447 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1448 int ret;
1449
1450 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1451
1452 if (mutex_lock_interruptible(&layer->opslock))
1453 return -ERESTARTSYS;
1454 ret = vb2_mmap(&layer->buffer_queue, vma);
1455 mutex_unlock(&layer->opslock);
1456 return ret;
1457 }
1458
1459 /* vpbe_display_poll(): It is used for select/poll system call
1460 */
1461 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1462 {
1463 struct vpbe_fh *fh = filep->private_data;
1464 struct vpbe_layer *layer = fh->layer;
1465 struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1466 unsigned int err = 0;
1467
1468 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1469 if (layer->started) {
1470 mutex_lock(&layer->opslock);
1471 err = vb2_poll(&layer->buffer_queue, filep, wait);
1472 mutex_unlock(&layer->opslock);
1473 }
1474 return err;
1475 }
1476
1477 /*
1478 * vpbe_display_open()
1479 * It creates object of file handle structure and stores it in private_data
1480 * member of filepointer
1481 */
1482 static int vpbe_display_open(struct file *file)
1483 {
1484 struct vpbe_fh *fh = NULL;
1485 struct vpbe_layer *layer = video_drvdata(file);
1486 struct vpbe_display *disp_dev = layer->disp_dev;
1487 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1488 struct osd_state *osd_device = disp_dev->osd_device;
1489 int err;
1490
1491 /* Allocate memory for the file handle object */
1492 fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1493 if (fh == NULL) {
1494 v4l2_err(&vpbe_dev->v4l2_dev,
1495 "unable to allocate memory for file handle object\n");
1496 return -ENOMEM;
1497 }
1498 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1499 "vpbe display open plane = %d\n",
1500 layer->device_id);
1501
1502 /* store pointer to fh in private_data member of filep */
1503 file->private_data = fh;
1504 fh->layer = layer;
1505 fh->disp_dev = disp_dev;
1506
1507 if (!layer->usrs) {
1508 if (mutex_lock_interruptible(&layer->opslock))
1509 return -ERESTARTSYS;
1510 /* First claim the layer for this device */
1511 err = osd_device->ops.request_layer(osd_device,
1512 layer->layer_info.id);
1513 mutex_unlock(&layer->opslock);
1514 if (err < 0) {
1515 /* Couldn't get layer */
1516 v4l2_err(&vpbe_dev->v4l2_dev,
1517 "Display Manager failed to allocate layer\n");
1518 kfree(fh);
1519 return -EINVAL;
1520 }
1521 }
1522 /* Increment layer usrs counter */
1523 layer->usrs++;
1524 /* Set io_allowed member to false */
1525 fh->io_allowed = 0;
1526 /* Initialize priority of this instance to default priority */
1527 fh->prio = V4L2_PRIORITY_UNSET;
1528 v4l2_prio_open(&layer->prio, &fh->prio);
1529 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1530 "vpbe display device opened successfully\n");
1531 return 0;
1532 }
1533
1534 /*
1535 * vpbe_display_release()
1536 * This function deletes buffer queue, frees the buffers and the davinci
1537 * display file * handle
1538 */
1539 static int vpbe_display_release(struct file *file)
1540 {
1541 /* Get the layer object and file handle object */
1542 struct vpbe_fh *fh = file->private_data;
1543 struct vpbe_layer *layer = fh->layer;
1544 struct osd_layer_config *cfg = &layer->layer_info.config;
1545 struct vpbe_display *disp_dev = fh->disp_dev;
1546 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1547 struct osd_state *osd_device = disp_dev->osd_device;
1548
1549 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1550
1551 mutex_lock(&layer->opslock);
1552 /* if this instance is doing IO */
1553 if (fh->io_allowed) {
1554 /* Reset io_usrs member of layer object */
1555 layer->io_usrs = 0;
1556
1557 osd_device->ops.disable_layer(osd_device,
1558 layer->layer_info.id);
1559 layer->started = 0;
1560 /* Free buffers allocated */
1561 vb2_queue_release(&layer->buffer_queue);
1562 vb2_dma_contig_cleanup_ctx(&layer->buffer_queue);
1563 }
1564
1565 /* Decrement layer usrs counter */
1566 layer->usrs--;
1567 /* If this file handle has initialize encoder device, reset it */
1568 if (!layer->usrs) {
1569 if (cfg->pixfmt == PIXFMT_NV12) {
1570 struct vpbe_layer *otherlayer;
1571 otherlayer =
1572 _vpbe_display_get_other_win_layer(disp_dev, layer);
1573 osd_device->ops.disable_layer(osd_device,
1574 otherlayer->layer_info.id);
1575 osd_device->ops.release_layer(osd_device,
1576 otherlayer->layer_info.id);
1577 }
1578 osd_device->ops.disable_layer(osd_device,
1579 layer->layer_info.id);
1580 osd_device->ops.release_layer(osd_device,
1581 layer->layer_info.id);
1582 }
1583 /* Close the priority */
1584 v4l2_prio_close(&layer->prio, fh->prio);
1585 file->private_data = NULL;
1586 mutex_unlock(&layer->opslock);
1587
1588 /* Free memory allocated to file handle object */
1589 kfree(fh);
1590
1591 disp_dev->cbcr_ofst = 0;
1592
1593 return 0;
1594 }
1595
1596 /* vpbe capture ioctl operations */
1597 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1598 .vidioc_querycap = vpbe_display_querycap,
1599 .vidioc_g_fmt_vid_out = vpbe_display_g_fmt,
1600 .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1601 .vidioc_s_fmt_vid_out = vpbe_display_s_fmt,
1602 .vidioc_try_fmt_vid_out = vpbe_display_try_fmt,
1603 .vidioc_reqbufs = vpbe_display_reqbufs,
1604 .vidioc_querybuf = vpbe_display_querybuf,
1605 .vidioc_qbuf = vpbe_display_qbuf,
1606 .vidioc_dqbuf = vpbe_display_dqbuf,
1607 .vidioc_streamon = vpbe_display_streamon,
1608 .vidioc_streamoff = vpbe_display_streamoff,
1609 .vidioc_cropcap = vpbe_display_cropcap,
1610 .vidioc_g_crop = vpbe_display_g_crop,
1611 .vidioc_s_crop = vpbe_display_s_crop,
1612 .vidioc_g_priority = vpbe_display_g_priority,
1613 .vidioc_s_priority = vpbe_display_s_priority,
1614 .vidioc_s_std = vpbe_display_s_std,
1615 .vidioc_g_std = vpbe_display_g_std,
1616 .vidioc_enum_output = vpbe_display_enum_output,
1617 .vidioc_s_output = vpbe_display_s_output,
1618 .vidioc_g_output = vpbe_display_g_output,
1619 .vidioc_s_dv_timings = vpbe_display_s_dv_timings,
1620 .vidioc_g_dv_timings = vpbe_display_g_dv_timings,
1621 .vidioc_enum_dv_timings = vpbe_display_enum_dv_timings,
1622 };
1623
1624 static struct v4l2_file_operations vpbe_fops = {
1625 .owner = THIS_MODULE,
1626 .open = vpbe_display_open,
1627 .release = vpbe_display_release,
1628 .unlocked_ioctl = video_ioctl2,
1629 .mmap = vpbe_display_mmap,
1630 .poll = vpbe_display_poll
1631 };
1632
1633 static int vpbe_device_get(struct device *dev, void *data)
1634 {
1635 struct platform_device *pdev = to_platform_device(dev);
1636 struct vpbe_display *vpbe_disp = data;
1637
1638 if (strcmp("vpbe_controller", pdev->name) == 0)
1639 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1640
1641 if (strstr(pdev->name, "vpbe-osd") != NULL)
1642 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1643
1644 return 0;
1645 }
1646
1647 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1648 struct platform_device *pdev)
1649 {
1650 struct vpbe_layer *vpbe_display_layer = NULL;
1651 struct video_device *vbd = NULL;
1652
1653 /* Allocate memory for four plane display objects */
1654
1655 disp_dev->dev[i] =
1656 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1657
1658 /* If memory allocation fails, return error */
1659 if (!disp_dev->dev[i]) {
1660 printk(KERN_ERR "ran out of memory\n");
1661 return -ENOMEM;
1662 }
1663 spin_lock_init(&disp_dev->dev[i]->irqlock);
1664 mutex_init(&disp_dev->dev[i]->opslock);
1665
1666 /* Get the pointer to the layer object */
1667 vpbe_display_layer = disp_dev->dev[i];
1668 vbd = &vpbe_display_layer->video_dev;
1669 /* Initialize field of video device */
1670 vbd->release = video_device_release_empty;
1671 vbd->fops = &vpbe_fops;
1672 vbd->ioctl_ops = &vpbe_ioctl_ops;
1673 vbd->minor = -1;
1674 vbd->v4l2_dev = &disp_dev->vpbe_dev->v4l2_dev;
1675 vbd->lock = &vpbe_display_layer->opslock;
1676 vbd->vfl_dir = VFL_DIR_TX;
1677
1678 if (disp_dev->vpbe_dev->current_timings.timings_type &
1679 VPBE_ENC_STD)
1680 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1681
1682 snprintf(vbd->name, sizeof(vbd->name),
1683 "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1684 (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1685 (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1686 (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1687
1688 vpbe_display_layer->device_id = i;
1689
1690 vpbe_display_layer->layer_info.id =
1691 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1692
1693 /* Initialize prio member of layer object */
1694 v4l2_prio_init(&vpbe_display_layer->prio);
1695
1696 return 0;
1697 }
1698
1699 static int register_device(struct vpbe_layer *vpbe_display_layer,
1700 struct vpbe_display *disp_dev,
1701 struct platform_device *pdev)
1702 {
1703 int err;
1704
1705 v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1706 "Trying to register VPBE display device.\n");
1707 v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1708 "layer=%x,layer->video_dev=%x\n",
1709 (int)vpbe_display_layer,
1710 (int)&vpbe_display_layer->video_dev);
1711
1712 err = video_register_device(&vpbe_display_layer->video_dev,
1713 VFL_TYPE_GRABBER,
1714 -1);
1715 if (err)
1716 return -ENODEV;
1717
1718 vpbe_display_layer->disp_dev = disp_dev;
1719 /* set the driver data in platform device */
1720 platform_set_drvdata(pdev, disp_dev);
1721 video_set_drvdata(&vpbe_display_layer->video_dev,
1722 vpbe_display_layer);
1723
1724 return 0;
1725 }
1726
1727
1728
1729 /*
1730 * vpbe_display_probe()
1731 * This function creates device entries by register itself to the V4L2 driver
1732 * and initializes fields of each layer objects
1733 */
1734 static int vpbe_display_probe(struct platform_device *pdev)
1735 {
1736 struct vpbe_layer *vpbe_display_layer;
1737 struct vpbe_display *disp_dev;
1738 struct resource *res = NULL;
1739 int k;
1740 int i;
1741 int err;
1742 int irq;
1743
1744 printk(KERN_DEBUG "vpbe_display_probe\n");
1745 /* Allocate memory for vpbe_display */
1746 disp_dev = devm_kzalloc(&pdev->dev, sizeof(struct vpbe_display),
1747 GFP_KERNEL);
1748 if (!disp_dev)
1749 return -ENOMEM;
1750
1751 spin_lock_init(&disp_dev->dma_queue_lock);
1752 /*
1753 * Scan all the platform devices to find the vpbe
1754 * controller device and get the vpbe_dev object
1755 */
1756 err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1757 vpbe_device_get);
1758 if (err < 0)
1759 return err;
1760 /* Initialize the vpbe display controller */
1761 if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1762 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1763 disp_dev->vpbe_dev);
1764 if (err) {
1765 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1766 "Error initing vpbe\n");
1767 err = -ENOMEM;
1768 goto probe_out;
1769 }
1770 }
1771
1772 for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1773 if (init_vpbe_layer(i, disp_dev, pdev)) {
1774 err = -ENODEV;
1775 goto probe_out;
1776 }
1777 }
1778
1779 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1780 if (!res) {
1781 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1782 "Unable to get VENC interrupt resource\n");
1783 err = -ENODEV;
1784 goto probe_out;
1785 }
1786
1787 irq = res->start;
1788 err = devm_request_irq(&pdev->dev, irq, venc_isr, IRQF_DISABLED,
1789 VPBE_DISPLAY_DRIVER, disp_dev);
1790 if (err) {
1791 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1792 "Unable to request interrupt\n");
1793 goto probe_out;
1794 }
1795
1796 for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1797 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1798 err = -ENODEV;
1799 goto probe_out;
1800 }
1801 }
1802
1803 printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1804 return 0;
1805
1806 probe_out:
1807 for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1808 /* Get the pointer to the layer object */
1809 vpbe_display_layer = disp_dev->dev[k];
1810 /* Unregister video device */
1811 if (vpbe_display_layer) {
1812 video_unregister_device(
1813 &vpbe_display_layer->video_dev);
1814 kfree(disp_dev->dev[k]);
1815 }
1816 }
1817 return err;
1818 }
1819
1820 /*
1821 * vpbe_display_remove()
1822 * It un-register hardware layer from V4L2 driver
1823 */
1824 static int vpbe_display_remove(struct platform_device *pdev)
1825 {
1826 struct vpbe_layer *vpbe_display_layer;
1827 struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1828 struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1829 int i;
1830
1831 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1832
1833 /* deinitialize the vpbe display controller */
1834 if (NULL != vpbe_dev->ops.deinitialize)
1835 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1836 /* un-register device */
1837 for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1838 /* Get the pointer to the layer object */
1839 vpbe_display_layer = disp_dev->dev[i];
1840 /* Unregister video device */
1841 video_unregister_device(&vpbe_display_layer->video_dev);
1842
1843 }
1844 for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1845 kfree(disp_dev->dev[i]);
1846 disp_dev->dev[i] = NULL;
1847 }
1848
1849 return 0;
1850 }
1851
1852 static struct platform_driver vpbe_display_driver = {
1853 .driver = {
1854 .name = VPBE_DISPLAY_DRIVER,
1855 .owner = THIS_MODULE,
1856 .bus = &platform_bus_type,
1857 },
1858 .probe = vpbe_display_probe,
1859 .remove = vpbe_display_remove,
1860 };
1861
1862 module_platform_driver(vpbe_display_driver);
1863
1864 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1865 MODULE_LICENSE("GPL");
1866 MODULE_AUTHOR("Texas Instruments");
Linux with added FPC-III support