Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

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 (NULL == 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 (NULL == 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 (NULL == 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         enum v4l2_mbus_pixelcode if_params;
231         int enc_out_index;
232         int sd_index;
233         int ret = 0;
234 
235         if (index >= cfg->num_outputs)
236                 return -EINVAL;
237 
238         mutex_lock(&vpbe_dev->lock);
239 
240         sd_index = vpbe_dev->current_sd_index;
241         enc_out_index = cfg->outputs[index].output.index;
242         /*
243          * Currently we switch the encoder based on output selected
244          * by the application. If media controller is implemented later
245          * there is will be an API added to setup_link between venc
246          * and external encoder. So in that case below comparison always
247          * match and encoder will not be switched. But if application
248          * chose not to use media controller, then this provides current
249          * way of switching encoder at the venc output.
250          */
251         if (strcmp(curr_enc_info->module_name,
252                    cfg->outputs[index].subdev_name)) {
253                 /* Need to switch the encoder at the output */
254                 sd_index = vpbe_find_encoder_sd_index(cfg, index);
255                 if (sd_index < 0) {
256                         ret = -EINVAL;
257                         goto out;
258                 }
259 
260                 if_params = cfg->outputs[index].if_params;
261                 venc_device->setup_if_config(if_params);
262                 if (ret)
263                         goto out;
264         }
265 
266         /* Set output at the encoder */
267         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
268                                        s_routing, 0, enc_out_index, 0);
269         if (ret)
270                 goto out;
271 
272         /*
273          * It is assumed that venc or extenal encoder will set a default
274          * mode in the sub device. For external encoder or LCD pannel output,
275          * we also need to set up the lcd port for the required mode. So setup
276          * the lcd port for the default mode that is configured in the board
277          * arch/arm/mach-davinci/board-dm355-evm.setup file for the external
278          * encoder.
279          */
280         ret = vpbe_get_mode_info(vpbe_dev,
281                                  cfg->outputs[index].default_mode, index);
282         if (!ret) {
283                 struct osd_state *osd_device = vpbe_dev->osd_device;
284 
285                 osd_device->ops.set_left_margin(osd_device,
286                         vpbe_dev->current_timings.left_margin);
287                 osd_device->ops.set_top_margin(osd_device,
288                 vpbe_dev->current_timings.upper_margin);
289                 vpbe_dev->current_sd_index = sd_index;
290                 vpbe_dev->current_out_index = index;
291         }
292 out:
293         mutex_unlock(&vpbe_dev->lock);
294         return ret;
295 }
296 
297 static int vpbe_set_default_output(struct vpbe_device *vpbe_dev)
298 {
299         struct vpbe_config *cfg = vpbe_dev->cfg;
300         int ret = 0;
301         int i;
302 
303         for (i = 0; i < cfg->num_outputs; i++) {
304                 if (!strcmp(def_output,
305                             cfg->outputs[i].output.name)) {
306                         ret = vpbe_set_output(vpbe_dev, i);
307                         if (!ret)
308                                 vpbe_dev->current_out_index = i;
309                         return ret;
310                 }
311         }
312         return ret;
313 }
314 
315 /**
316  * vpbe_get_output - Get output
317  * @vpbe_dev - vpbe device ptr
318  *
319  * return current vpbe output to the the index
320  */
321 static unsigned int vpbe_get_output(struct vpbe_device *vpbe_dev)
322 {
323         return vpbe_dev->current_out_index;
324 }
325 
326 /**
327  * vpbe_s_dv_timings - Set the given preset timings in the encoder
328  *
329  * Sets the timings if supported by the current encoder. Return the status.
330  * 0 - success & -EINVAL on error
331  */
332 static int vpbe_s_dv_timings(struct vpbe_device *vpbe_dev,
333                     struct v4l2_dv_timings *dv_timings)
334 {
335         struct vpbe_config *cfg = vpbe_dev->cfg;
336         int out_index = vpbe_dev->current_out_index;
337         struct vpbe_output *output = &cfg->outputs[out_index];
338         int sd_index = vpbe_dev->current_sd_index;
339         int ret, i;
340 
341 
342         if (!(cfg->outputs[out_index].output.capabilities &
343             V4L2_OUT_CAP_DV_TIMINGS))
344                 return -EINVAL;
345 
346         for (i = 0; i < output->num_modes; i++) {
347                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS &&
348                     !memcmp(&output->modes[i].dv_timings,
349                                 dv_timings, sizeof(*dv_timings)))
350                         break;
351         }
352         if (i >= output->num_modes)
353                 return -EINVAL;
354         vpbe_dev->current_timings = output->modes[i];
355         mutex_lock(&vpbe_dev->lock);
356 
357         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
358                                         s_dv_timings, dv_timings);
359         if (!ret && (vpbe_dev->amp != NULL)) {
360                 /* Call amplifier subdevice */
361                 ret = v4l2_subdev_call(vpbe_dev->amp, video,
362                                 s_dv_timings, dv_timings);
363         }
364         /* set the lcd controller output for the given mode */
365         if (!ret) {
366                 struct osd_state *osd_device = vpbe_dev->osd_device;
367 
368                 osd_device->ops.set_left_margin(osd_device,
369                 vpbe_dev->current_timings.left_margin);
370                 osd_device->ops.set_top_margin(osd_device,
371                 vpbe_dev->current_timings.upper_margin);
372         }
373         mutex_unlock(&vpbe_dev->lock);
374 
375         return ret;
376 }
377 
378 /**
379  * vpbe_g_dv_timings - Get the timings in the current encoder
380  *
381  * Get the timings in the current encoder. Return the status. 0 - success
382  * -EINVAL on error
383  */
384 static int vpbe_g_dv_timings(struct vpbe_device *vpbe_dev,
385                      struct v4l2_dv_timings *dv_timings)
386 {
387         if (vpbe_dev->current_timings.timings_type &
388           VPBE_ENC_DV_TIMINGS) {
389                 *dv_timings = vpbe_dev->current_timings.dv_timings;
390                 return 0;
391         }
392 
393         return -EINVAL;
394 }
395 
396 /**
397  * vpbe_enum_dv_timings - Enumerate the dv timings in the current encoder
398  *
399  * Get the timings in the current encoder. Return the status. 0 - success
400  * -EINVAL on error
401  */
402 static int vpbe_enum_dv_timings(struct vpbe_device *vpbe_dev,
403                          struct v4l2_enum_dv_timings *timings)
404 {
405         struct vpbe_config *cfg = vpbe_dev->cfg;
406         int out_index = vpbe_dev->current_out_index;
407         struct vpbe_output *output = &cfg->outputs[out_index];
408         int j = 0;
409         int i;
410 
411         if (!(output->output.capabilities & V4L2_OUT_CAP_DV_TIMINGS))
412                 return -EINVAL;
413 
414         for (i = 0; i < output->num_modes; i++) {
415                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS) {
416                         if (j == timings->index)
417                                 break;
418                         j++;
419                 }
420         }
421 
422         if (i == output->num_modes)
423                 return -EINVAL;
424         timings->timings = output->modes[i].dv_timings;
425         return 0;
426 }
427 
428 /**
429  * vpbe_s_std - Set the given standard in the encoder
430  *
431  * Sets the standard if supported by the current encoder. Return the status.
432  * 0 - success & -EINVAL on error
433  */
434 static int vpbe_s_std(struct vpbe_device *vpbe_dev, v4l2_std_id std_id)
435 {
436         struct vpbe_config *cfg = vpbe_dev->cfg;
437         int out_index = vpbe_dev->current_out_index;
438         int sd_index = vpbe_dev->current_sd_index;
439         int ret;
440 
441         if (!(cfg->outputs[out_index].output.capabilities &
442                 V4L2_OUT_CAP_STD))
443                 return -EINVAL;
444 
445         ret = vpbe_get_std_info(vpbe_dev, std_id);
446         if (ret)
447                 return ret;
448 
449         mutex_lock(&vpbe_dev->lock);
450 
451         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
452                                s_std_output, std_id);
453         /* set the lcd controller output for the given mode */
454         if (!ret) {
455                 struct osd_state *osd_device = vpbe_dev->osd_device;
456 
457                 osd_device->ops.set_left_margin(osd_device,
458                 vpbe_dev->current_timings.left_margin);
459                 osd_device->ops.set_top_margin(osd_device,
460                 vpbe_dev->current_timings.upper_margin);
461         }
462         mutex_unlock(&vpbe_dev->lock);
463 
464         return ret;
465 }
466 
467 /**
468  * vpbe_g_std - Get the standard in the current encoder
469  *
470  * Get the standard in the current encoder. Return the status. 0 - success
471  * -EINVAL on error
472  */
473 static int vpbe_g_std(struct vpbe_device *vpbe_dev, v4l2_std_id *std_id)
474 {
475         struct vpbe_enc_mode_info *cur_timings = &vpbe_dev->current_timings;
476 
477         if (cur_timings->timings_type & VPBE_ENC_STD) {
478                 *std_id = cur_timings->std_id;
479                 return 0;
480         }
481 
482         return -EINVAL;
483 }
484 
485 /**
486  * vpbe_set_mode - Set mode in the current encoder using mode info
487  *
488  * Use the mode string to decide what timings to set in the encoder
489  * This is typically useful when fbset command is used to change the current
490  * timings by specifying a string to indicate the timings.
491  */
492 static int vpbe_set_mode(struct vpbe_device *vpbe_dev,
493                          struct vpbe_enc_mode_info *mode_info)
494 {
495         struct vpbe_enc_mode_info *preset_mode = NULL;
496         struct vpbe_config *cfg = vpbe_dev->cfg;
497         struct v4l2_dv_timings dv_timings;
498         struct osd_state *osd_device;
499         int out_index = vpbe_dev->current_out_index;
500         int ret = 0;
501         int i;
502 
503         if ((NULL == mode_info) || (NULL == mode_info->name))
504                 return -EINVAL;
505 
506         for (i = 0; i < cfg->outputs[out_index].num_modes; i++) {
507                 if (!strcmp(mode_info->name,
508                      cfg->outputs[out_index].modes[i].name)) {
509                         preset_mode = &cfg->outputs[out_index].modes[i];
510                         /*
511                          * it may be one of the 3 timings type. Check and
512                          * invoke right API
513                          */
514                         if (preset_mode->timings_type & VPBE_ENC_STD)
515                                 return vpbe_s_std(vpbe_dev,
516                                                  preset_mode->std_id);
517                         if (preset_mode->timings_type &
518                                                 VPBE_ENC_DV_TIMINGS) {
519                                 dv_timings =
520                                         preset_mode->dv_timings;
521                                 return vpbe_s_dv_timings(vpbe_dev, &dv_timings);
522                         }
523                 }
524         }
525 
526         /* Only custom timing should reach here */
527         if (preset_mode == NULL)
528                 return -EINVAL;
529 
530         mutex_lock(&vpbe_dev->lock);
531 
532         osd_device = vpbe_dev->osd_device;
533         vpbe_dev->current_timings = *preset_mode;
534         osd_device->ops.set_left_margin(osd_device,
535                 vpbe_dev->current_timings.left_margin);
536         osd_device->ops.set_top_margin(osd_device,
537                 vpbe_dev->current_timings.upper_margin);
538 
539         mutex_unlock(&vpbe_dev->lock);
540 
541         return ret;
542 }
543 
544 static int vpbe_set_default_mode(struct vpbe_device *vpbe_dev)
545 {
546         int ret;
547 
548         ret = vpbe_get_std_info_by_name(vpbe_dev, def_mode);
549         if (ret)
550                 return ret;
551 
552         /* set the default mode in the encoder */
553         return vpbe_set_mode(vpbe_dev, &vpbe_dev->current_timings);
554 }
555 
556 static int platform_device_get(struct device *dev, void *data)
557 {
558         struct platform_device *pdev = to_platform_device(dev);
559         struct vpbe_device *vpbe_dev = data;
560 
561         if (strstr(pdev->name, "vpbe-osd") != NULL)
562                 vpbe_dev->osd_device = platform_get_drvdata(pdev);
563         if (strstr(pdev->name, "vpbe-venc") != NULL)
564                 vpbe_dev->venc_device = dev_get_platdata(&pdev->dev);
565 
566         return 0;
567 }
568 
569 /**
570  * vpbe_initialize() - Initialize the vpbe display controller
571  * @vpbe_dev - vpbe device ptr
572  *
573  * Master frame buffer device drivers calls this to initialize vpbe
574  * display controller. This will then registers v4l2 device and the sub
575  * devices and sets a current encoder sub device for display. v4l2 display
576  * device driver is the master and frame buffer display device driver is
577  * the slave. Frame buffer display driver checks the initialized during
578  * probe and exit if not initialized. Returns status.
579  */
580 static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
581 {
582         struct encoder_config_info *enc_info;
583         struct amp_config_info *amp_info;
584         struct v4l2_subdev **enc_subdev;
585         struct osd_state *osd_device;
586         struct i2c_adapter *i2c_adap;
587         int num_encoders;
588         int ret = 0;
589         int err;
590         int i;
591 
592         /*
593          * v4l2 abd FBDev frame buffer devices will get the vpbe_dev pointer
594          * from the platform device by iteration of platform drivers and
595          * matching with device name
596          */
597         if (NULL == vpbe_dev || NULL == dev) {
598                 printk(KERN_ERR "Null device pointers.\n");
599                 return -ENODEV;
600         }
601 
602         if (vpbe_dev->initialized)
603                 return 0;
604 
605         mutex_lock(&vpbe_dev->lock);
606 
607         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
608                 /* We have dac clock available for platform */
609                 vpbe_dev->dac_clk = clk_get(vpbe_dev->pdev, "vpss_dac");
610                 if (IS_ERR(vpbe_dev->dac_clk)) {
611                         ret =  PTR_ERR(vpbe_dev->dac_clk);
612                         goto fail_mutex_unlock;
613                 }
614                 if (clk_prepare_enable(vpbe_dev->dac_clk)) {
615                         ret =  -ENODEV;
616                         goto fail_mutex_unlock;
617                 }
618         }
619 
620         /* first enable vpss clocks */
621         vpss_enable_clock(VPSS_VPBE_CLOCK, 1);
622 
623         /* First register a v4l2 device */
624         ret = v4l2_device_register(dev, &vpbe_dev->v4l2_dev);
625         if (ret) {
626                 v4l2_err(dev->driver,
627                         "Unable to register v4l2 device.\n");
628                 goto fail_clk_put;
629         }
630         v4l2_info(&vpbe_dev->v4l2_dev, "vpbe v4l2 device registered\n");
631 
632         err = bus_for_each_dev(&platform_bus_type, NULL, vpbe_dev,
633                                platform_device_get);
634         if (err < 0) {
635                 ret = err;
636                 goto fail_dev_unregister;
637         }
638 
639         vpbe_dev->venc = venc_sub_dev_init(&vpbe_dev->v4l2_dev,
640                                            vpbe_dev->cfg->venc.module_name);
641         /* register venc sub device */
642         if (vpbe_dev->venc == NULL) {
643                 v4l2_err(&vpbe_dev->v4l2_dev,
644                         "vpbe unable to init venc sub device\n");
645                 ret = -ENODEV;
646                 goto fail_dev_unregister;
647         }
648         /* initialize osd device */
649         osd_device = vpbe_dev->osd_device;
650 
651         if (NULL != osd_device->ops.initialize) {
652                 err = osd_device->ops.initialize(osd_device);
653                 if (err) {
654                         v4l2_err(&vpbe_dev->v4l2_dev,
655                                  "unable to initialize the OSD device");
656                         err = -ENOMEM;
657                         goto fail_dev_unregister;
658                 }
659         }
660 
661         /*
662          * Register any external encoders that are configured. At index 0 we
663          * store venc sd index.
664          */
665         num_encoders = vpbe_dev->cfg->num_ext_encoders + 1;
666         vpbe_dev->encoders = kmalloc(
667                                 sizeof(struct v4l2_subdev *)*num_encoders,
668                                 GFP_KERNEL);
669         if (NULL == vpbe_dev->encoders) {
670                 v4l2_err(&vpbe_dev->v4l2_dev,
671                         "unable to allocate memory for encoders sub devices");
672                 ret = -ENOMEM;
673                 goto fail_dev_unregister;
674         }
675 
676         i2c_adap = i2c_get_adapter(vpbe_dev->cfg->i2c_adapter_id);
677         for (i = 0; i < (vpbe_dev->cfg->num_ext_encoders + 1); i++) {
678                 if (i == 0) {
679                         /* venc is at index 0 */
680                         enc_subdev = &vpbe_dev->encoders[i];
681                         *enc_subdev = vpbe_dev->venc;
682                         continue;
683                 }
684                 enc_info = &vpbe_dev->cfg->ext_encoders[i];
685                 if (enc_info->is_i2c) {
686                         enc_subdev = &vpbe_dev->encoders[i];
687                         *enc_subdev = v4l2_i2c_new_subdev_board(
688                                                 &vpbe_dev->v4l2_dev, i2c_adap,
689                                                 &enc_info->board_info, NULL);
690                         if (*enc_subdev)
691                                 v4l2_info(&vpbe_dev->v4l2_dev,
692                                           "v4l2 sub device %s registered\n",
693                                           enc_info->module_name);
694                         else {
695                                 v4l2_err(&vpbe_dev->v4l2_dev, "encoder %s"
696                                          " failed to register",
697                                          enc_info->module_name);
698                                 ret = -ENODEV;
699                                 goto fail_kfree_encoders;
700                         }
701                 } else
702                         v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c encoders"
703                                  " currently not supported");
704         }
705         /* Add amplifier subdevice for dm365 */
706         if ((strcmp(vpbe_dev->cfg->module_name, "dm365-vpbe-display") == 0) &&
707                         vpbe_dev->cfg->amp != NULL) {
708                 amp_info = vpbe_dev->cfg->amp;
709                 if (amp_info->is_i2c) {
710                         vpbe_dev->amp = v4l2_i2c_new_subdev_board(
711                         &vpbe_dev->v4l2_dev, i2c_adap,
712                         &amp_info->board_info, NULL);
713                         if (!vpbe_dev->amp) {
714                                 v4l2_err(&vpbe_dev->v4l2_dev,
715                                          "amplifier %s failed to register",
716                                          amp_info->module_name);
717                                 ret = -ENODEV;
718                                 goto fail_kfree_encoders;
719                         }
720                         v4l2_info(&vpbe_dev->v4l2_dev,
721                                           "v4l2 sub device %s registered\n",
722                                           amp_info->module_name);
723                 } else {
724                             vpbe_dev->amp = NULL;
725                             v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c amplifiers"
726                             " currently not supported");
727                 }
728         } else {
729             vpbe_dev->amp = NULL;
730         }
731 
732         /* set the current encoder and output to that of venc by default */
733         vpbe_dev->current_sd_index = 0;
734         vpbe_dev->current_out_index = 0;
735 
736         mutex_unlock(&vpbe_dev->lock);
737 
738         printk(KERN_NOTICE "Setting default output to %s\n", def_output);
739         ret = vpbe_set_default_output(vpbe_dev);
740         if (ret) {
741                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default output %s",
742                          def_output);
743                 return ret;
744         }
745 
746         printk(KERN_NOTICE "Setting default mode to %s\n", def_mode);
747         ret = vpbe_set_default_mode(vpbe_dev);
748         if (ret) {
749                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default mode %s",
750                          def_mode);
751                 return ret;
752         }
753         vpbe_dev->initialized = 1;
754         /* TBD handling of bootargs for default output and mode */
755         return 0;
756 
757 fail_kfree_encoders:
758         kfree(vpbe_dev->encoders);
759 fail_dev_unregister:
760         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
761 fail_clk_put:
762         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
763                 clk_disable_unprepare(vpbe_dev->dac_clk);
764                 clk_put(vpbe_dev->dac_clk);
765         }
766 fail_mutex_unlock:
767         mutex_unlock(&vpbe_dev->lock);
768         return ret;
769 }
770 
771 /**
772  * vpbe_deinitialize() - de-initialize the vpbe display controller
773  * @dev - Master and slave device ptr
774  *
775  * vpbe_master and slave frame buffer devices calls this to de-initialize
776  * the display controller. It is called when master and slave device
777  * driver modules are removed and no longer requires the display controller.
778  */
779 static void vpbe_deinitialize(struct device *dev, struct vpbe_device *vpbe_dev)
780 {
781         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
782         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
783                 clk_disable_unprepare(vpbe_dev->dac_clk);
784                 clk_put(vpbe_dev->dac_clk);
785         }
786 
787         kfree(vpbe_dev->amp);
788         kfree(vpbe_dev->encoders);
789         vpbe_dev->initialized = 0;
790         /* disable vpss clocks */
791         vpss_enable_clock(VPSS_VPBE_CLOCK, 0);
792 }
793 
794 static struct vpbe_device_ops vpbe_dev_ops = {
795         .g_cropcap = vpbe_g_cropcap,
796         .enum_outputs = vpbe_enum_outputs,
797         .set_output = vpbe_set_output,
798         .get_output = vpbe_get_output,
799         .s_dv_timings = vpbe_s_dv_timings,
800         .g_dv_timings = vpbe_g_dv_timings,
801         .enum_dv_timings = vpbe_enum_dv_timings,
802         .s_std = vpbe_s_std,
803         .g_std = vpbe_g_std,
804         .initialize = vpbe_initialize,
805         .deinitialize = vpbe_deinitialize,
806         .get_mode_info = vpbe_get_current_mode_info,
807         .set_mode = vpbe_set_mode,
808 };
809 
810 static int vpbe_probe(struct platform_device *pdev)
811 {
812         struct vpbe_device *vpbe_dev;
813         struct vpbe_config *cfg;
814         int ret = -EINVAL;
815 
816         if (pdev->dev.platform_data == NULL) {
817                 v4l2_err(pdev->dev.driver, "No platform data\n");
818                 return -ENODEV;
819         }
820         cfg = pdev->dev.platform_data;
821 
822         if (!cfg->module_name[0] ||
823             !cfg->osd.module_name[0] ||
824             !cfg->venc.module_name[0]) {
825                 v4l2_err(pdev->dev.driver, "vpbe display module names not"
826                          " defined\n");
827                 return ret;
828         }
829 
830         vpbe_dev = kzalloc(sizeof(*vpbe_dev), GFP_KERNEL);
831         if (vpbe_dev == NULL) {
832                 v4l2_err(pdev->dev.driver, "Unable to allocate memory"
833                          " for vpbe_device\n");
834                 return -ENOMEM;
835         }
836         vpbe_dev->cfg = cfg;
837         vpbe_dev->ops = vpbe_dev_ops;
838         vpbe_dev->pdev = &pdev->dev;
839 
840         if (cfg->outputs->num_modes > 0)
841                 vpbe_dev->current_timings = vpbe_dev->cfg->outputs[0].modes[0];
842         else {
843                 kfree(vpbe_dev);
844                 return -ENODEV;
845         }
846 
847         /* set the driver data in platform device */
848         platform_set_drvdata(pdev, vpbe_dev);
849         mutex_init(&vpbe_dev->lock);
850 
851         return 0;
852 }
853 
854 static int vpbe_remove(struct platform_device *device)
855 {
856         struct vpbe_device *vpbe_dev = platform_get_drvdata(device);
857 
858         kfree(vpbe_dev);
859 
860         return 0;
861 }
862 
863 static struct platform_driver vpbe_driver = {
864         .driver = {
865                 .name   = "vpbe_controller",
866                 .owner  = THIS_MODULE,
867         },
868         .probe = vpbe_probe,
869         .remove = vpbe_remove,
870 };
871 
872 module_platform_driver(vpbe_driver);
873 

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