Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/media/platform/davinci/vpbe.c

  1 /*
  2  * Copyright (C) 2010 Texas Instruments Inc
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License as published by
  6  * the Free Software Foundation version 2.
  7  *
  8  * This program is distributed in the hope that it will be useful,
  9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 11  * GNU General Public License for more details.
 12  *
 13  * You should have received a copy of the GNU General Public License
 14  * along with this program; if not, write to the Free Software
 15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 16  */
 17 #include <linux/kernel.h>
 18 #include <linux/init.h>
 19 #include <linux/module.h>
 20 #include <linux/errno.h>
 21 #include <linux/fs.h>
 22 #include <linux/string.h>
 23 #include <linux/wait.h>
 24 #include <linux/time.h>
 25 #include <linux/platform_device.h>
 26 #include <linux/io.h>
 27 #include <linux/slab.h>
 28 #include <linux/clk.h>
 29 #include <linux/err.h>
 30 
 31 #include <media/v4l2-device.h>
 32 #include <media/davinci/vpbe_types.h>
 33 #include <media/davinci/vpbe.h>
 34 #include <media/davinci/vpss.h>
 35 #include <media/davinci/vpbe_venc.h>
 36 
 37 #define VPBE_DEFAULT_OUTPUT     "Composite"
 38 #define VPBE_DEFAULT_MODE       "ntsc"
 39 
 40 static char *def_output = VPBE_DEFAULT_OUTPUT;
 41 static char *def_mode = VPBE_DEFAULT_MODE;
 42 static int debug;
 43 
 44 module_param(def_output, charp, S_IRUGO);
 45 module_param(def_mode, charp, S_IRUGO);
 46 module_param(debug, int, 0644);
 47 
 48 MODULE_PARM_DESC(def_output, "vpbe output name (default:Composite)");
 49 MODULE_PARM_DESC(def_mode, "vpbe output mode name (default:ntsc");
 50 MODULE_PARM_DESC(debug, "Debug level 0-1");
 51 
 52 MODULE_DESCRIPTION("TI DMXXX VPBE Display controller");
 53 MODULE_LICENSE("GPL");
 54 MODULE_AUTHOR("Texas Instruments");
 55 
 56 /**
 57  * vpbe_current_encoder_info - Get config info for current encoder
 58  * @vpbe_dev - vpbe device ptr
 59  *
 60  * Return ptr to current encoder config info
 61  */
 62 static struct encoder_config_info*
 63 vpbe_current_encoder_info(struct vpbe_device *vpbe_dev)
 64 {
 65         struct vpbe_config *cfg = vpbe_dev->cfg;
 66         int index = vpbe_dev->current_sd_index;
 67 
 68         return ((index == 0) ? &cfg->venc :
 69                                 &cfg->ext_encoders[index-1]);
 70 }
 71 
 72 /**
 73  * vpbe_find_encoder_sd_index - Given a name find encoder sd index
 74  *
 75  * @vpbe_config - ptr to vpbe cfg
 76  * @output_index - index used by application
 77  *
 78  * Return sd index of the encoder
 79  */
 80 static int vpbe_find_encoder_sd_index(struct vpbe_config *cfg,
 81                              int index)
 82 {
 83         char *encoder_name = cfg->outputs[index].subdev_name;
 84         int i;
 85 
 86         /* Venc is always first */
 87         if (!strcmp(encoder_name, cfg->venc.module_name))
 88                 return 0;
 89 
 90         for (i = 0; i < cfg->num_ext_encoders; i++) {
 91                 if (!strcmp(encoder_name,
 92                      cfg->ext_encoders[i].module_name))
 93                         return i+1;
 94         }
 95 
 96         return -EINVAL;
 97 }
 98 
 99 /**
100  * vpbe_g_cropcap - Get crop capabilities of the display
101  * @vpbe_dev - vpbe device ptr
102  * @cropcap - cropcap is a ptr to struct v4l2_cropcap
103  *
104  * Update the crop capabilities in crop cap for current
105  * mode
106  */
107 static int vpbe_g_cropcap(struct vpbe_device *vpbe_dev,
108                           struct v4l2_cropcap *cropcap)
109 {
110         if (!cropcap)
111                 return -EINVAL;
112         cropcap->bounds.left = 0;
113         cropcap->bounds.top = 0;
114         cropcap->bounds.width = vpbe_dev->current_timings.xres;
115         cropcap->bounds.height = vpbe_dev->current_timings.yres;
116         cropcap->defrect = cropcap->bounds;
117 
118         return 0;
119 }
120 
121 /**
122  * vpbe_enum_outputs - enumerate outputs
123  * @vpbe_dev - vpbe device ptr
124  * @output - ptr to v4l2_output structure
125  *
126  * Enumerates the outputs available at the vpbe display
127  * returns the status, -EINVAL if end of output list
128  */
129 static int vpbe_enum_outputs(struct vpbe_device *vpbe_dev,
130                              struct v4l2_output *output)
131 {
132         struct vpbe_config *cfg = vpbe_dev->cfg;
133         int temp_index = output->index;
134 
135         if (temp_index >= cfg->num_outputs)
136                 return -EINVAL;
137 
138         *output = cfg->outputs[temp_index].output;
139         output->index = temp_index;
140 
141         return 0;
142 }
143 
144 static int vpbe_get_mode_info(struct vpbe_device *vpbe_dev, char *mode,
145                               int output_index)
146 {
147         struct vpbe_config *cfg = vpbe_dev->cfg;
148         struct vpbe_enc_mode_info var;
149         int curr_output = output_index;
150         int i;
151 
152         if (!mode)
153                 return -EINVAL;
154 
155         for (i = 0; i < cfg->outputs[curr_output].num_modes; i++) {
156                 var = cfg->outputs[curr_output].modes[i];
157                 if (!strcmp(mode, var.name)) {
158                         vpbe_dev->current_timings = var;
159                         return 0;
160                 }
161         }
162 
163         return -EINVAL;
164 }
165 
166 static int vpbe_get_current_mode_info(struct vpbe_device *vpbe_dev,
167                                       struct vpbe_enc_mode_info *mode_info)
168 {
169         if (!mode_info)
170                 return -EINVAL;
171 
172         *mode_info = vpbe_dev->current_timings;
173 
174         return 0;
175 }
176 
177 /* Get std by std id */
178 static int vpbe_get_std_info(struct vpbe_device *vpbe_dev,
179                              v4l2_std_id std_id)
180 {
181         struct vpbe_config *cfg = vpbe_dev->cfg;
182         struct vpbe_enc_mode_info var;
183         int curr_output = vpbe_dev->current_out_index;
184         int i;
185 
186         for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) {
187                 var = cfg->outputs[curr_output].modes[i];
188                 if ((var.timings_type & VPBE_ENC_STD) &&
189                   (var.std_id & std_id)) {
190                         vpbe_dev->current_timings = var;
191                         return 0;
192                 }
193         }
194 
195         return -EINVAL;
196 }
197 
198 static int vpbe_get_std_info_by_name(struct vpbe_device *vpbe_dev,
199                                 char *std_name)
200 {
201         struct vpbe_config *cfg = vpbe_dev->cfg;
202         struct vpbe_enc_mode_info var;
203         int curr_output = vpbe_dev->current_out_index;
204         int i;
205 
206         for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) {
207                 var = cfg->outputs[curr_output].modes[i];
208                 if (!strcmp(var.name, std_name)) {
209                         vpbe_dev->current_timings = var;
210                         return 0;
211                 }
212         }
213 
214         return -EINVAL;
215 }
216 
217 /**
218  * vpbe_set_output - Set output
219  * @vpbe_dev - vpbe device ptr
220  * @index - index of output
221  *
222  * Set vpbe output to the output specified by the index
223  */
224 static int vpbe_set_output(struct vpbe_device *vpbe_dev, int index)
225 {
226         struct encoder_config_info *curr_enc_info =
227                         vpbe_current_encoder_info(vpbe_dev);
228         struct vpbe_config *cfg = vpbe_dev->cfg;
229         struct venc_platform_data *venc_device = vpbe_dev->venc_device;
230         int enc_out_index;
231         int sd_index;
232         int ret;
233 
234         if (index >= cfg->num_outputs)
235                 return -EINVAL;
236 
237         mutex_lock(&vpbe_dev->lock);
238 
239         sd_index = vpbe_dev->current_sd_index;
240         enc_out_index = cfg->outputs[index].output.index;
241         /*
242          * Currently we switch the encoder based on output selected
243          * by the application. If media controller is implemented later
244          * there is will be an API added to setup_link between venc
245          * and external encoder. So in that case below comparison always
246          * match and encoder will not be switched. But if application
247          * chose not to use media controller, then this provides current
248          * way of switching encoder at the venc output.
249          */
250         if (strcmp(curr_enc_info->module_name,
251                    cfg->outputs[index].subdev_name)) {
252                 /* Need to switch the encoder at the output */
253                 sd_index = vpbe_find_encoder_sd_index(cfg, index);
254                 if (sd_index < 0) {
255                         ret = -EINVAL;
256                         goto unlock;
257                 }
258 
259                 ret = venc_device->setup_if_config(cfg->outputs[index].if_params);
260                 if (ret)
261                         goto unlock;
262         }
263 
264         /* Set output at the encoder */
265         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
266                                        s_routing, 0, enc_out_index, 0);
267         if (ret)
268                 goto unlock;
269 
270         /*
271          * It is assumed that venc or extenal encoder will set a default
272          * mode in the sub device. For external encoder or LCD pannel output,
273          * we also need to set up the lcd port for the required mode. So setup
274          * the lcd port for the default mode that is configured in the board
275          * arch/arm/mach-davinci/board-dm355-evm.setup file for the external
276          * encoder.
277          */
278         ret = vpbe_get_mode_info(vpbe_dev,
279                                  cfg->outputs[index].default_mode, index);
280         if (!ret) {
281                 struct osd_state *osd_device = vpbe_dev->osd_device;
282 
283                 osd_device->ops.set_left_margin(osd_device,
284                         vpbe_dev->current_timings.left_margin);
285                 osd_device->ops.set_top_margin(osd_device,
286                 vpbe_dev->current_timings.upper_margin);
287                 vpbe_dev->current_sd_index = sd_index;
288                 vpbe_dev->current_out_index = index;
289         }
290 unlock:
291         mutex_unlock(&vpbe_dev->lock);
292         return ret;
293 }
294 
295 static int vpbe_set_default_output(struct vpbe_device *vpbe_dev)
296 {
297         struct vpbe_config *cfg = vpbe_dev->cfg;
298         int i;
299 
300         for (i = 0; i < cfg->num_outputs; i++) {
301                 if (!strcmp(def_output,
302                             cfg->outputs[i].output.name)) {
303                         int ret = vpbe_set_output(vpbe_dev, i);
304 
305                         if (!ret)
306                                 vpbe_dev->current_out_index = i;
307                         return ret;
308                 }
309         }
310         return 0;
311 }
312 
313 /**
314  * vpbe_get_output - Get output
315  * @vpbe_dev - vpbe device ptr
316  *
317  * return current vpbe output to the the index
318  */
319 static unsigned int vpbe_get_output(struct vpbe_device *vpbe_dev)
320 {
321         return vpbe_dev->current_out_index;
322 }
323 
324 /**
325  * vpbe_s_dv_timings - Set the given preset timings in the encoder
326  *
327  * Sets the timings if supported by the current encoder. Return the status.
328  * 0 - success & -EINVAL on error
329  */
330 static int vpbe_s_dv_timings(struct vpbe_device *vpbe_dev,
331                     struct v4l2_dv_timings *dv_timings)
332 {
333         struct vpbe_config *cfg = vpbe_dev->cfg;
334         int out_index = vpbe_dev->current_out_index;
335         struct vpbe_output *output = &cfg->outputs[out_index];
336         int sd_index = vpbe_dev->current_sd_index;
337         int ret, i;
338 
339 
340         if (!(cfg->outputs[out_index].output.capabilities &
341             V4L2_OUT_CAP_DV_TIMINGS))
342                 return -ENODATA;
343 
344         for (i = 0; i < output->num_modes; i++) {
345                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS &&
346                     !memcmp(&output->modes[i].dv_timings,
347                                 dv_timings, sizeof(*dv_timings)))
348                         break;
349         }
350         if (i >= output->num_modes)
351                 return -EINVAL;
352         vpbe_dev->current_timings = output->modes[i];
353         mutex_lock(&vpbe_dev->lock);
354 
355         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
356                                         s_dv_timings, dv_timings);
357         if (!ret && vpbe_dev->amp) {
358                 /* Call amplifier subdevice */
359                 ret = v4l2_subdev_call(vpbe_dev->amp, video,
360                                 s_dv_timings, dv_timings);
361         }
362         /* set the lcd controller output for the given mode */
363         if (!ret) {
364                 struct osd_state *osd_device = vpbe_dev->osd_device;
365 
366                 osd_device->ops.set_left_margin(osd_device,
367                 vpbe_dev->current_timings.left_margin);
368                 osd_device->ops.set_top_margin(osd_device,
369                 vpbe_dev->current_timings.upper_margin);
370         }
371         mutex_unlock(&vpbe_dev->lock);
372 
373         return ret;
374 }
375 
376 /**
377  * vpbe_g_dv_timings - Get the timings in the current encoder
378  *
379  * Get the timings in the current encoder. Return the status. 0 - success
380  * -EINVAL on error
381  */
382 static int vpbe_g_dv_timings(struct vpbe_device *vpbe_dev,
383                      struct v4l2_dv_timings *dv_timings)
384 {
385         struct vpbe_config *cfg = vpbe_dev->cfg;
386         int out_index = vpbe_dev->current_out_index;
387 
388         if (!(cfg->outputs[out_index].output.capabilities &
389                 V4L2_OUT_CAP_DV_TIMINGS))
390                 return -ENODATA;
391 
392         if (vpbe_dev->current_timings.timings_type &
393           VPBE_ENC_DV_TIMINGS) {
394                 *dv_timings = vpbe_dev->current_timings.dv_timings;
395                 return 0;
396         }
397 
398         return -EINVAL;
399 }
400 
401 /**
402  * vpbe_enum_dv_timings - Enumerate the dv timings in the current encoder
403  *
404  * Get the timings in the current encoder. Return the status. 0 - success
405  * -EINVAL on error
406  */
407 static int vpbe_enum_dv_timings(struct vpbe_device *vpbe_dev,
408                          struct v4l2_enum_dv_timings *timings)
409 {
410         struct vpbe_config *cfg = vpbe_dev->cfg;
411         int out_index = vpbe_dev->current_out_index;
412         struct vpbe_output *output = &cfg->outputs[out_index];
413         int j = 0;
414         int i;
415 
416         if (!(output->output.capabilities & V4L2_OUT_CAP_DV_TIMINGS))
417                 return -ENODATA;
418 
419         for (i = 0; i < output->num_modes; i++) {
420                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS) {
421                         if (j == timings->index)
422                                 break;
423                         j++;
424                 }
425         }
426 
427         if (i == output->num_modes)
428                 return -EINVAL;
429         timings->timings = output->modes[i].dv_timings;
430         return 0;
431 }
432 
433 /**
434  * vpbe_s_std - Set the given standard in the encoder
435  *
436  * Sets the standard if supported by the current encoder. Return the status.
437  * 0 - success & -EINVAL on error
438  */
439 static int vpbe_s_std(struct vpbe_device *vpbe_dev, v4l2_std_id std_id)
440 {
441         struct vpbe_config *cfg = vpbe_dev->cfg;
442         int out_index = vpbe_dev->current_out_index;
443         int sd_index = vpbe_dev->current_sd_index;
444         int ret;
445 
446         if (!(cfg->outputs[out_index].output.capabilities &
447                 V4L2_OUT_CAP_STD))
448                 return -ENODATA;
449 
450         ret = vpbe_get_std_info(vpbe_dev, std_id);
451         if (ret)
452                 return ret;
453 
454         mutex_lock(&vpbe_dev->lock);
455 
456         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
457                                s_std_output, std_id);
458         /* set the lcd controller output for the given mode */
459         if (!ret) {
460                 struct osd_state *osd_device = vpbe_dev->osd_device;
461 
462                 osd_device->ops.set_left_margin(osd_device,
463                 vpbe_dev->current_timings.left_margin);
464                 osd_device->ops.set_top_margin(osd_device,
465                 vpbe_dev->current_timings.upper_margin);
466         }
467         mutex_unlock(&vpbe_dev->lock);
468 
469         return ret;
470 }
471 
472 /**
473  * vpbe_g_std - Get the standard in the current encoder
474  *
475  * Get the standard in the current encoder. Return the status. 0 - success
476  * -EINVAL on error
477  */
478 static int vpbe_g_std(struct vpbe_device *vpbe_dev, v4l2_std_id *std_id)
479 {
480         struct vpbe_enc_mode_info *cur_timings = &vpbe_dev->current_timings;
481         struct vpbe_config *cfg = vpbe_dev->cfg;
482         int out_index = vpbe_dev->current_out_index;
483 
484         if (!(cfg->outputs[out_index].output.capabilities & V4L2_OUT_CAP_STD))
485                 return -ENODATA;
486 
487         if (cur_timings->timings_type & VPBE_ENC_STD) {
488                 *std_id = cur_timings->std_id;
489                 return 0;
490         }
491 
492         return -EINVAL;
493 }
494 
495 /**
496  * vpbe_set_mode - Set mode in the current encoder using mode info
497  *
498  * Use the mode string to decide what timings to set in the encoder
499  * This is typically useful when fbset command is used to change the current
500  * timings by specifying a string to indicate the timings.
501  */
502 static int vpbe_set_mode(struct vpbe_device *vpbe_dev,
503                          struct vpbe_enc_mode_info *mode_info)
504 {
505         struct vpbe_enc_mode_info *preset_mode = NULL;
506         struct vpbe_config *cfg = vpbe_dev->cfg;
507         struct v4l2_dv_timings dv_timings;
508         struct osd_state *osd_device;
509         int out_index = vpbe_dev->current_out_index;
510         int i;
511 
512         if (!mode_info || !mode_info->name)
513                 return -EINVAL;
514 
515         for (i = 0; i < cfg->outputs[out_index].num_modes; i++) {
516                 if (!strcmp(mode_info->name,
517                      cfg->outputs[out_index].modes[i].name)) {
518                         preset_mode = &cfg->outputs[out_index].modes[i];
519                         /*
520                          * it may be one of the 3 timings type. Check and
521                          * invoke right API
522                          */
523                         if (preset_mode->timings_type & VPBE_ENC_STD)
524                                 return vpbe_s_std(vpbe_dev,
525                                                  preset_mode->std_id);
526                         if (preset_mode->timings_type &
527                                                 VPBE_ENC_DV_TIMINGS) {
528                                 dv_timings =
529                                         preset_mode->dv_timings;
530                                 return vpbe_s_dv_timings(vpbe_dev, &dv_timings);
531                         }
532                 }
533         }
534 
535         /* Only custom timing should reach here */
536         if (!preset_mode)
537                 return -EINVAL;
538 
539         mutex_lock(&vpbe_dev->lock);
540 
541         osd_device = vpbe_dev->osd_device;
542         vpbe_dev->current_timings = *preset_mode;
543         osd_device->ops.set_left_margin(osd_device,
544                 vpbe_dev->current_timings.left_margin);
545         osd_device->ops.set_top_margin(osd_device,
546                 vpbe_dev->current_timings.upper_margin);
547 
548         mutex_unlock(&vpbe_dev->lock);
549         return 0;
550 }
551 
552 static int vpbe_set_default_mode(struct vpbe_device *vpbe_dev)
553 {
554         int ret;
555 
556         ret = vpbe_get_std_info_by_name(vpbe_dev, def_mode);
557         if (ret)
558                 return ret;
559 
560         /* set the default mode in the encoder */
561         return vpbe_set_mode(vpbe_dev, &vpbe_dev->current_timings);
562 }
563 
564 static int platform_device_get(struct device *dev, void *data)
565 {
566         struct platform_device *pdev = to_platform_device(dev);
567         struct vpbe_device *vpbe_dev = data;
568 
569         if (strstr(pdev->name, "vpbe-osd"))
570                 vpbe_dev->osd_device = platform_get_drvdata(pdev);
571         if (strstr(pdev->name, "vpbe-venc"))
572                 vpbe_dev->venc_device = dev_get_platdata(&pdev->dev);
573 
574         return 0;
575 }
576 
577 /**
578  * vpbe_initialize() - Initialize the vpbe display controller
579  * @vpbe_dev - vpbe device ptr
580  *
581  * Master frame buffer device drivers calls this to initialize vpbe
582  * display controller. This will then registers v4l2 device and the sub
583  * devices and sets a current encoder sub device for display. v4l2 display
584  * device driver is the master and frame buffer display device driver is
585  * the slave. Frame buffer display driver checks the initialized during
586  * probe and exit if not initialized. Returns status.
587  */
588 static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
589 {
590         struct encoder_config_info *enc_info;
591         struct amp_config_info *amp_info;
592         struct v4l2_subdev **enc_subdev;
593         struct osd_state *osd_device;
594         struct i2c_adapter *i2c_adap;
595         int num_encoders;
596         int ret = 0;
597         int err;
598         int i;
599 
600         /*
601          * v4l2 abd FBDev frame buffer devices will get the vpbe_dev pointer
602          * from the platform device by iteration of platform drivers and
603          * matching with device name
604          */
605         if (!vpbe_dev || !dev) {
606                 printk(KERN_ERR "Null device pointers.\n");
607                 return -ENODEV;
608         }
609 
610         if (vpbe_dev->initialized)
611                 return 0;
612 
613         mutex_lock(&vpbe_dev->lock);
614 
615         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
616                 /* We have dac clock available for platform */
617                 vpbe_dev->dac_clk = clk_get(vpbe_dev->pdev, "vpss_dac");
618                 if (IS_ERR(vpbe_dev->dac_clk)) {
619                         ret =  PTR_ERR(vpbe_dev->dac_clk);
620                         goto fail_mutex_unlock;
621                 }
622                 if (clk_prepare_enable(vpbe_dev->dac_clk)) {
623                         ret =  -ENODEV;
624                         clk_put(vpbe_dev->dac_clk);
625                         goto fail_mutex_unlock;
626                 }
627         }
628 
629         /* first enable vpss clocks */
630         vpss_enable_clock(VPSS_VPBE_CLOCK, 1);
631 
632         /* First register a v4l2 device */
633         ret = v4l2_device_register(dev, &vpbe_dev->v4l2_dev);
634         if (ret) {
635                 v4l2_err(dev->driver,
636                         "Unable to register v4l2 device.\n");
637                 goto fail_clk_put;
638         }
639         v4l2_info(&vpbe_dev->v4l2_dev, "vpbe v4l2 device registered\n");
640 
641         err = bus_for_each_dev(&platform_bus_type, NULL, vpbe_dev,
642                                platform_device_get);
643         if (err < 0) {
644                 ret = err;
645                 goto fail_dev_unregister;
646         }
647 
648         vpbe_dev->venc = venc_sub_dev_init(&vpbe_dev->v4l2_dev,
649                                            vpbe_dev->cfg->venc.module_name);
650         /* register venc sub device */
651         if (!vpbe_dev->venc) {
652                 v4l2_err(&vpbe_dev->v4l2_dev,
653                         "vpbe unable to init venc sub device\n");
654                 ret = -ENODEV;
655                 goto fail_dev_unregister;
656         }
657         /* initialize osd device */
658         osd_device = vpbe_dev->osd_device;
659         if (osd_device->ops.initialize) {
660                 err = osd_device->ops.initialize(osd_device);
661                 if (err) {
662                         v4l2_err(&vpbe_dev->v4l2_dev,
663                                  "unable to initialize the OSD device");
664                         err = -ENOMEM;
665                         goto fail_dev_unregister;
666                 }
667         }
668 
669         /*
670          * Register any external encoders that are configured. At index 0 we
671          * store venc sd index.
672          */
673         num_encoders = vpbe_dev->cfg->num_ext_encoders + 1;
674         vpbe_dev->encoders = kmalloc_array(num_encoders,
675                                            sizeof(*vpbe_dev->encoders),
676                                            GFP_KERNEL);
677         if (!vpbe_dev->encoders) {
678                 ret = -ENOMEM;
679                 goto fail_dev_unregister;
680         }
681 
682         i2c_adap = i2c_get_adapter(vpbe_dev->cfg->i2c_adapter_id);
683         for (i = 0; i < (vpbe_dev->cfg->num_ext_encoders + 1); i++) {
684                 if (i == 0) {
685                         /* venc is at index 0 */
686                         enc_subdev = &vpbe_dev->encoders[i];
687                         *enc_subdev = vpbe_dev->venc;
688                         continue;
689                 }
690                 enc_info = &vpbe_dev->cfg->ext_encoders[i];
691                 if (enc_info->is_i2c) {
692                         enc_subdev = &vpbe_dev->encoders[i];
693                         *enc_subdev = v4l2_i2c_new_subdev_board(
694                                                 &vpbe_dev->v4l2_dev, i2c_adap,
695                                                 &enc_info->board_info, NULL);
696                         if (*enc_subdev)
697                                 v4l2_info(&vpbe_dev->v4l2_dev,
698                                           "v4l2 sub device %s registered\n",
699                                           enc_info->module_name);
700                         else {
701                                 v4l2_err(&vpbe_dev->v4l2_dev, "encoder %s failed to register",
702                                          enc_info->module_name);
703                                 ret = -ENODEV;
704                                 goto fail_kfree_encoders;
705                         }
706                 } else
707                         v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c encoders currently not supported");
708         }
709         /* Add amplifier subdevice for dm365 */
710         if ((strcmp(vpbe_dev->cfg->module_name, "dm365-vpbe-display") == 0) &&
711            vpbe_dev->cfg->amp) {
712                 amp_info = vpbe_dev->cfg->amp;
713                 if (amp_info->is_i2c) {
714                         vpbe_dev->amp = v4l2_i2c_new_subdev_board(
715                         &vpbe_dev->v4l2_dev, i2c_adap,
716                         &amp_info->board_info, NULL);
717                         if (!vpbe_dev->amp) {
718                                 v4l2_err(&vpbe_dev->v4l2_dev,
719                                          "amplifier %s failed to register",
720                                          amp_info->module_name);
721                                 ret = -ENODEV;
722                                 goto fail_kfree_encoders;
723                         }
724                         v4l2_info(&vpbe_dev->v4l2_dev,
725                                           "v4l2 sub device %s registered\n",
726                                           amp_info->module_name);
727                 } else {
728                             vpbe_dev->amp = NULL;
729                             v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c amplifiers currently not supported");
730                 }
731         } else {
732             vpbe_dev->amp = NULL;
733         }
734 
735         /* set the current encoder and output to that of venc by default */
736         vpbe_dev->current_sd_index = 0;
737         vpbe_dev->current_out_index = 0;
738 
739         mutex_unlock(&vpbe_dev->lock);
740 
741         printk(KERN_NOTICE "Setting default output to %s\n", def_output);
742         ret = vpbe_set_default_output(vpbe_dev);
743         if (ret) {
744                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default output %s",
745                          def_output);
746                 return ret;
747         }
748 
749         printk(KERN_NOTICE "Setting default mode to %s\n", def_mode);
750         ret = vpbe_set_default_mode(vpbe_dev);
751         if (ret) {
752                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default mode %s",
753                          def_mode);
754                 return ret;
755         }
756         vpbe_dev->initialized = 1;
757         /* TBD handling of bootargs for default output and mode */
758         return 0;
759 
760 fail_kfree_encoders:
761         kfree(vpbe_dev->encoders);
762 fail_dev_unregister:
763         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
764 fail_clk_put:
765         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
766                 clk_disable_unprepare(vpbe_dev->dac_clk);
767                 clk_put(vpbe_dev->dac_clk);
768         }
769 fail_mutex_unlock:
770         mutex_unlock(&vpbe_dev->lock);
771         return ret;
772 }
773 
774 /**
775  * vpbe_deinitialize() - de-initialize the vpbe display controller
776  * @dev - Master and slave device ptr
777  *
778  * vpbe_master and slave frame buffer devices calls this to de-initialize
779  * the display controller. It is called when master and slave device
780  * driver modules are removed and no longer requires the display controller.
781  */
782 static void vpbe_deinitialize(struct device *dev, struct vpbe_device *vpbe_dev)
783 {
784         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
785         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
786                 clk_disable_unprepare(vpbe_dev->dac_clk);
787                 clk_put(vpbe_dev->dac_clk);
788         }
789 
790         kfree(vpbe_dev->amp);
791         kfree(vpbe_dev->encoders);
792         vpbe_dev->initialized = 0;
793         /* disable vpss clocks */
794         vpss_enable_clock(VPSS_VPBE_CLOCK, 0);
795 }
796 
797 static struct vpbe_device_ops vpbe_dev_ops = {
798         .g_cropcap = vpbe_g_cropcap,
799         .enum_outputs = vpbe_enum_outputs,
800         .set_output = vpbe_set_output,
801         .get_output = vpbe_get_output,
802         .s_dv_timings = vpbe_s_dv_timings,
803         .g_dv_timings = vpbe_g_dv_timings,
804         .enum_dv_timings = vpbe_enum_dv_timings,
805         .s_std = vpbe_s_std,
806         .g_std = vpbe_g_std,
807         .initialize = vpbe_initialize,
808         .deinitialize = vpbe_deinitialize,
809         .get_mode_info = vpbe_get_current_mode_info,
810         .set_mode = vpbe_set_mode,
811 };
812 
813 static int vpbe_probe(struct platform_device *pdev)
814 {
815         struct vpbe_device *vpbe_dev;
816         struct vpbe_config *cfg;
817 
818         if (!pdev->dev.platform_data) {
819                 v4l2_err(pdev->dev.driver, "No platform data\n");
820                 return -ENODEV;
821         }
822         cfg = pdev->dev.platform_data;
823 
824         if (!cfg->module_name[0] ||
825             !cfg->osd.module_name[0] ||
826             !cfg->venc.module_name[0]) {
827                 v4l2_err(pdev->dev.driver, "vpbe display module names not defined\n");
828                 return -EINVAL;
829         }
830 
831         vpbe_dev = kzalloc(sizeof(*vpbe_dev), GFP_KERNEL);
832         if (!vpbe_dev)
833                 return -ENOMEM;
834 
835         vpbe_dev->cfg = cfg;
836         vpbe_dev->ops = vpbe_dev_ops;
837         vpbe_dev->pdev = &pdev->dev;
838 
839         if (cfg->outputs->num_modes > 0)
840                 vpbe_dev->current_timings = vpbe_dev->cfg->outputs[0].modes[0];
841         else {
842                 kfree(vpbe_dev);
843                 return -ENODEV;
844         }
845 
846         /* set the driver data in platform device */
847         platform_set_drvdata(pdev, vpbe_dev);
848         mutex_init(&vpbe_dev->lock);
849 
850         return 0;
851 }
852 
853 static int vpbe_remove(struct platform_device *device)
854 {
855         struct vpbe_device *vpbe_dev = platform_get_drvdata(device);
856 
857         kfree(vpbe_dev);
858 
859         return 0;
860 }
861 
862 static struct platform_driver vpbe_driver = {
863         .driver = {
864                 .name   = "vpbe_controller",
865         },
866         .probe = vpbe_probe,
867         .remove = vpbe_remove,
868 };
869 
870 module_platform_driver(vpbe_driver);
871 

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