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10#include <linux/backlight.h>
11#include <linux/clk.h>
12
13#include <drm/drmP.h>
14#include <drm/drm_crtc.h>
15#include <drm/drm_crtc_helper.h>
16#include <drm/drm_fb_cma_helper.h>
17#include <drm/drm_gem_cma_helper.h>
18#include <drm/drm_plane_helper.h>
19#include <drm/drm_probe_helper.h>
20
21#include "shmob_drm_backlight.h"
22#include "shmob_drm_crtc.h"
23#include "shmob_drm_drv.h"
24#include "shmob_drm_kms.h"
25#include "shmob_drm_plane.h"
26#include "shmob_drm_regs.h"
27
28
29
30
31
32
33
34
35
36static int shmob_drm_clk_on(struct shmob_drm_device *sdev)
37{
38 int ret;
39
40 if (sdev->clock) {
41 ret = clk_prepare_enable(sdev->clock);
42 if (ret < 0)
43 return ret;
44 }
45
46 return 0;
47}
48
49static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
50{
51 if (sdev->clock)
52 clk_disable_unprepare(sdev->clock);
53}
54
55
56
57
58
59static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
60{
61 struct drm_crtc *crtc = &scrtc->crtc;
62 struct shmob_drm_device *sdev = crtc->dev->dev_private;
63 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
64 const struct drm_display_mode *mode = &crtc->mode;
65 u32 value;
66
67 value = sdev->ldmt1r
68 | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
69 | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
70 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
71 | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
72 | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
73 | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
74 | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
75 lcdc_write(sdev, LDMT1R, value);
76
77 if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
78 idata->interface <= SHMOB_DRM_IFACE_SYS24) {
79
80 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
81 | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
82 | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
83 | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
84 | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
85 | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
86 lcdc_write(sdev, LDMT2R, value);
87
88 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
89 | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
90 | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
91 | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
92 lcdc_write(sdev, LDMT3R, value);
93 }
94
95 value = ((mode->hdisplay / 8) << 16)
96 | (mode->htotal / 8);
97 lcdc_write(sdev, LDHCNR, value);
98
99 value = (((mode->hsync_end - mode->hsync_start) / 8) << 16)
100 | (mode->hsync_start / 8);
101 lcdc_write(sdev, LDHSYNR, value);
102
103 value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
104 | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
105 | (mode->hsync_start & 7);
106 lcdc_write(sdev, LDHAJR, value);
107
108 value = ((mode->vdisplay) << 16)
109 | mode->vtotal;
110 lcdc_write(sdev, LDVLNR, value);
111
112 value = ((mode->vsync_end - mode->vsync_start) << 16)
113 | mode->vsync_start;
114 lcdc_write(sdev, LDVSYNR, value);
115}
116
117static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
118{
119 struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
120 u32 value;
121
122 value = lcdc_read(sdev, LDCNT2R);
123 if (start)
124 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
125 else
126 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
127
128
129 while (1) {
130 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
131 if ((start && value) || (!start && !value))
132 break;
133
134 cpu_relax();
135 }
136
137 if (!start) {
138
139 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
140 }
141}
142
143
144
145
146
147
148
149
150static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
151{
152 struct drm_crtc *crtc = &scrtc->crtc;
153 struct shmob_drm_device *sdev = crtc->dev->dev_private;
154 const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
155 const struct shmob_drm_format_info *format;
156 struct drm_device *dev = sdev->ddev;
157 struct drm_plane *plane;
158 u32 value;
159 int ret;
160
161 if (scrtc->started)
162 return;
163
164 format = shmob_drm_format_info(crtc->primary->fb->format->format);
165 if (WARN_ON(format == NULL))
166 return;
167
168
169 ret = shmob_drm_clk_on(sdev);
170 if (ret < 0)
171 return;
172
173
174 lcdc_write(sdev, LDCNT2R, lcdc_read(sdev, LDCNT2R) | LDCNT2R_BR);
175 lcdc_wait_bit(sdev, LDCNT2R, LDCNT2R_BR, 0);
176 lcdc_write(sdev, LDCNT2R, LDCNT2R_ME);
177
178
179 shmob_drm_crtc_start_stop(scrtc, false);
180 lcdc_write(sdev, LDINTR, 0);
181
182
183 lcdc_write(sdev, LDPMR, 0);
184
185 value = sdev->lddckr;
186 if (idata->clk_div) {
187
188
189
190 lcdc_write(sdev, LDDCKPAT1R, 0);
191 lcdc_write(sdev, LDDCKPAT2R, (1 << (idata->clk_div / 2)) - 1);
192
193 if (idata->clk_div == 1)
194 value |= LDDCKR_MOSEL;
195 else
196 value |= idata->clk_div;
197 }
198
199 lcdc_write(sdev, LDDCKR, value);
200 lcdc_write(sdev, LDDCKSTPR, 0);
201 lcdc_wait_bit(sdev, LDDCKSTPR, ~0, 0);
202
203
204
205
206 shmob_drm_crtc_setup_geometry(scrtc);
207
208
209 lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
210 lcdc_write(sdev, LDMLSR, scrtc->line_size);
211 lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
212 if (format->yuv)
213 lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
214 lcdc_write(sdev, LDSM1R, 0);
215
216
217 switch (format->fourcc) {
218 case DRM_FORMAT_RGB565:
219 case DRM_FORMAT_NV21:
220 case DRM_FORMAT_NV61:
221 case DRM_FORMAT_NV42:
222 value = LDDDSR_LS | LDDDSR_WS;
223 break;
224 case DRM_FORMAT_RGB888:
225 case DRM_FORMAT_NV12:
226 case DRM_FORMAT_NV16:
227 case DRM_FORMAT_NV24:
228 value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
229 break;
230 case DRM_FORMAT_ARGB8888:
231 default:
232 value = LDDDSR_LS;
233 break;
234 }
235 lcdc_write(sdev, LDDDSR, value);
236
237
238 drm_for_each_legacy_plane(plane, dev) {
239 if (plane->crtc == crtc)
240 shmob_drm_plane_setup(plane);
241 }
242
243
244 lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
245
246 shmob_drm_crtc_start_stop(scrtc, true);
247
248 scrtc->started = true;
249}
250
251static void shmob_drm_crtc_stop(struct shmob_drm_crtc *scrtc)
252{
253 struct drm_crtc *crtc = &scrtc->crtc;
254 struct shmob_drm_device *sdev = crtc->dev->dev_private;
255
256 if (!scrtc->started)
257 return;
258
259
260 shmob_drm_crtc_start_stop(scrtc, false);
261
262
263 lcdc_write(sdev, LDCNT1R, 0);
264
265
266 shmob_drm_clk_off(sdev);
267
268 scrtc->started = false;
269}
270
271void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
272{
273 shmob_drm_crtc_stop(scrtc);
274}
275
276void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
277{
278 if (scrtc->dpms != DRM_MODE_DPMS_ON)
279 return;
280
281 shmob_drm_crtc_start(scrtc);
282}
283
284static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
285 int x, int y)
286{
287 struct drm_crtc *crtc = &scrtc->crtc;
288 struct drm_framebuffer *fb = crtc->primary->fb;
289 struct drm_gem_cma_object *gem;
290 unsigned int bpp;
291
292 bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
293 gem = drm_fb_cma_get_gem_obj(fb, 0);
294 scrtc->dma[0] = gem->paddr + fb->offsets[0]
295 + y * fb->pitches[0] + x * bpp / 8;
296
297 if (scrtc->format->yuv) {
298 bpp = scrtc->format->bpp - 8;
299 gem = drm_fb_cma_get_gem_obj(fb, 1);
300 scrtc->dma[1] = gem->paddr + fb->offsets[1]
301 + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
302 + x * (bpp == 16 ? 2 : 1);
303 }
304}
305
306static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
307{
308 struct drm_crtc *crtc = &scrtc->crtc;
309 struct shmob_drm_device *sdev = crtc->dev->dev_private;
310
311 shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
312
313 lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
314 if (scrtc->format->yuv)
315 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
316
317 lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
318}
319
320#define to_shmob_crtc(c) container_of(c, struct shmob_drm_crtc, crtc)
321
322static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
323{
324 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
325
326 if (scrtc->dpms == mode)
327 return;
328
329 if (mode == DRM_MODE_DPMS_ON)
330 shmob_drm_crtc_start(scrtc);
331 else
332 shmob_drm_crtc_stop(scrtc);
333
334 scrtc->dpms = mode;
335}
336
337static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
338{
339 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
340}
341
342static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
343 struct drm_display_mode *mode,
344 struct drm_display_mode *adjusted_mode,
345 int x, int y,
346 struct drm_framebuffer *old_fb)
347{
348 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
349 struct shmob_drm_device *sdev = crtc->dev->dev_private;
350 const struct shmob_drm_format_info *format;
351
352 format = shmob_drm_format_info(crtc->primary->fb->format->format);
353 if (format == NULL) {
354 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
355 crtc->primary->fb->format->format);
356 return -EINVAL;
357 }
358
359 scrtc->format = format;
360 scrtc->line_size = crtc->primary->fb->pitches[0];
361
362 shmob_drm_crtc_compute_base(scrtc, x, y);
363
364 return 0;
365}
366
367static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
368{
369 shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
370}
371
372static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
373 struct drm_framebuffer *old_fb)
374{
375 shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
376
377 return 0;
378}
379
380static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
381 .dpms = shmob_drm_crtc_dpms,
382 .prepare = shmob_drm_crtc_mode_prepare,
383 .commit = shmob_drm_crtc_mode_commit,
384 .mode_set = shmob_drm_crtc_mode_set,
385 .mode_set_base = shmob_drm_crtc_mode_set_base,
386};
387
388void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
389{
390 struct drm_pending_vblank_event *event;
391 struct drm_device *dev = scrtc->crtc.dev;
392 unsigned long flags;
393
394 spin_lock_irqsave(&dev->event_lock, flags);
395 event = scrtc->event;
396 scrtc->event = NULL;
397 if (event) {
398 drm_crtc_send_vblank_event(&scrtc->crtc, event);
399 drm_crtc_vblank_put(&scrtc->crtc);
400 }
401 spin_unlock_irqrestore(&dev->event_lock, flags);
402}
403
404static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
405 struct drm_framebuffer *fb,
406 struct drm_pending_vblank_event *event,
407 uint32_t page_flip_flags,
408 struct drm_modeset_acquire_ctx *ctx)
409{
410 struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
411 struct drm_device *dev = scrtc->crtc.dev;
412 unsigned long flags;
413
414 spin_lock_irqsave(&dev->event_lock, flags);
415 if (scrtc->event != NULL) {
416 spin_unlock_irqrestore(&dev->event_lock, flags);
417 return -EBUSY;
418 }
419 spin_unlock_irqrestore(&dev->event_lock, flags);
420
421 crtc->primary->fb = fb;
422 shmob_drm_crtc_update_base(scrtc);
423
424 if (event) {
425 event->pipe = 0;
426 drm_crtc_vblank_get(&scrtc->crtc);
427 spin_lock_irqsave(&dev->event_lock, flags);
428 scrtc->event = event;
429 spin_unlock_irqrestore(&dev->event_lock, flags);
430 }
431
432 return 0;
433}
434
435static void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev,
436 bool enable)
437{
438 unsigned long flags;
439 u32 ldintr;
440
441
442 spin_lock_irqsave(&sdev->irq_lock, flags);
443 ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
444 if (enable)
445 ldintr |= LDINTR_VEE;
446 else
447 ldintr &= ~LDINTR_VEE;
448 lcdc_write(sdev, LDINTR, ldintr);
449 spin_unlock_irqrestore(&sdev->irq_lock, flags);
450}
451
452static int shmob_drm_enable_vblank(struct drm_crtc *crtc)
453{
454 struct shmob_drm_device *sdev = crtc->dev->dev_private;
455
456 shmob_drm_crtc_enable_vblank(sdev, true);
457
458 return 0;
459}
460
461static void shmob_drm_disable_vblank(struct drm_crtc *crtc)
462{
463 struct shmob_drm_device *sdev = crtc->dev->dev_private;
464
465 shmob_drm_crtc_enable_vblank(sdev, false);
466}
467
468static const struct drm_crtc_funcs crtc_funcs = {
469 .destroy = drm_crtc_cleanup,
470 .set_config = drm_crtc_helper_set_config,
471 .page_flip = shmob_drm_crtc_page_flip,
472 .enable_vblank = shmob_drm_enable_vblank,
473 .disable_vblank = shmob_drm_disable_vblank,
474};
475
476int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
477{
478 struct drm_crtc *crtc = &sdev->crtc.crtc;
479 int ret;
480
481 sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
482
483 ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
484 if (ret < 0)
485 return ret;
486
487 drm_crtc_helper_add(crtc, &crtc_helper_funcs);
488
489 return 0;
490}
491
492
493
494
495
496#define to_shmob_encoder(e) \
497 container_of(e, struct shmob_drm_encoder, encoder)
498
499static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
500{
501 struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
502 struct shmob_drm_device *sdev = encoder->dev->dev_private;
503 struct shmob_drm_connector *scon = &sdev->connector;
504
505 if (senc->dpms == mode)
506 return;
507
508 shmob_drm_backlight_dpms(scon, mode);
509
510 senc->dpms = mode;
511}
512
513static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
514 const struct drm_display_mode *mode,
515 struct drm_display_mode *adjusted_mode)
516{
517 struct drm_device *dev = encoder->dev;
518 struct shmob_drm_device *sdev = dev->dev_private;
519 struct drm_connector *connector = &sdev->connector.connector;
520 const struct drm_display_mode *panel_mode;
521
522 if (list_empty(&connector->modes)) {
523 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
524 return false;
525 }
526
527
528 panel_mode = list_first_entry(&connector->modes,
529 struct drm_display_mode, head);
530 drm_mode_copy(adjusted_mode, panel_mode);
531
532 return true;
533}
534
535static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
536{
537
538}
539
540static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
541 struct drm_display_mode *mode,
542 struct drm_display_mode *adjusted_mode)
543{
544
545}
546
547static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
548{
549
550}
551
552static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
553 .dpms = shmob_drm_encoder_dpms,
554 .mode_fixup = shmob_drm_encoder_mode_fixup,
555 .prepare = shmob_drm_encoder_mode_prepare,
556 .commit = shmob_drm_encoder_mode_commit,
557 .mode_set = shmob_drm_encoder_mode_set,
558};
559
560static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
561{
562 drm_encoder_cleanup(encoder);
563}
564
565static const struct drm_encoder_funcs encoder_funcs = {
566 .destroy = shmob_drm_encoder_destroy,
567};
568
569int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
570{
571 struct drm_encoder *encoder = &sdev->encoder.encoder;
572 int ret;
573
574 sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
575
576 encoder->possible_crtcs = 1;
577
578 ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
579 DRM_MODE_ENCODER_LVDS, NULL);
580 if (ret < 0)
581 return ret;
582
583 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
584
585 return 0;
586}
587
588
589
590
591
592#define to_shmob_connector(c) \
593 container_of(c, struct shmob_drm_connector, connector)
594
595static int shmob_drm_connector_get_modes(struct drm_connector *connector)
596{
597 struct shmob_drm_device *sdev = connector->dev->dev_private;
598 struct drm_display_mode *mode;
599
600 mode = drm_mode_create(connector->dev);
601 if (mode == NULL)
602 return 0;
603
604 mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
605 mode->clock = sdev->pdata->panel.mode.clock;
606 mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
607 mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
608 mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
609 mode->htotal = sdev->pdata->panel.mode.htotal;
610 mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
611 mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
612 mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
613 mode->vtotal = sdev->pdata->panel.mode.vtotal;
614 mode->flags = sdev->pdata->panel.mode.flags;
615
616 drm_mode_set_name(mode);
617 drm_mode_probed_add(connector, mode);
618
619 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
620 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
621
622 return 1;
623}
624
625static struct drm_encoder *
626shmob_drm_connector_best_encoder(struct drm_connector *connector)
627{
628 struct shmob_drm_connector *scon = to_shmob_connector(connector);
629
630 return scon->encoder;
631}
632
633static const struct drm_connector_helper_funcs connector_helper_funcs = {
634 .get_modes = shmob_drm_connector_get_modes,
635 .best_encoder = shmob_drm_connector_best_encoder,
636};
637
638static void shmob_drm_connector_destroy(struct drm_connector *connector)
639{
640 struct shmob_drm_connector *scon = to_shmob_connector(connector);
641
642 shmob_drm_backlight_exit(scon);
643 drm_connector_unregister(connector);
644 drm_connector_cleanup(connector);
645}
646
647static const struct drm_connector_funcs connector_funcs = {
648 .dpms = drm_helper_connector_dpms,
649 .fill_modes = drm_helper_probe_single_connector_modes,
650 .destroy = shmob_drm_connector_destroy,
651};
652
653int shmob_drm_connector_create(struct shmob_drm_device *sdev,
654 struct drm_encoder *encoder)
655{
656 struct drm_connector *connector = &sdev->connector.connector;
657 int ret;
658
659 sdev->connector.encoder = encoder;
660
661 connector->display_info.width_mm = sdev->pdata->panel.width_mm;
662 connector->display_info.height_mm = sdev->pdata->panel.height_mm;
663
664 ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
665 DRM_MODE_CONNECTOR_LVDS);
666 if (ret < 0)
667 return ret;
668
669 drm_connector_helper_add(connector, &connector_helper_funcs);
670
671 ret = shmob_drm_backlight_init(&sdev->connector);
672 if (ret < 0)
673 goto err_cleanup;
674
675 ret = drm_connector_attach_encoder(connector, encoder);
676 if (ret < 0)
677 goto err_backlight;
678
679 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
680 drm_object_property_set_value(&connector->base,
681 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
682
683 return 0;
684
685err_backlight:
686 shmob_drm_backlight_exit(&sdev->connector);
687err_cleanup:
688 drm_connector_cleanup(connector);
689 return ret;
690}
691