git.proxmox.com Git - mirror_ubuntu-kernels.git/blob

1 // SPDX-License-Identifier: GPL-2.0-only

2 /*

4 */

6 #include <linux/module.h>

7 #include <linux/slab.h>

8 #include <linux/uaccess.h>

9 #include <linux/debugfs.h>

10 #include <linux/component.h>

11 #include <linux/of_irq.h>

12 #include <linux/delay.h>

14 #include "msm_drv.h"

15 #include "msm_kms.h"

16 #include "dp_hpd.h"

17 #include "dp_parser.h"

18 #include "dp_power.h"

19 #include "dp_catalog.h"

20 #include "dp_aux.h"

21 #include "dp_reg.h"

22 #include "dp_link.h"

23 #include "dp_panel.h"

24 #include "dp_ctrl.h"

25 #include "dp_display.h"

26 #include "dp_drm.h"

27 #include "dp_audio.h"

28 #include "dp_debug.h"

30 static struct msm_dp *g_dp_display;

31 #define HPD_STRING_SIZE 30

33 enum {

34 ISR_DISCONNECTED,

35 ISR_CONNECT_PENDING,

36 ISR_CONNECTED,

37 ISR_HPD_REPLUG_COUNT,

38 ISR_IRQ_HPD_PULSE_COUNT,

39 ISR_HPD_LO_GLITH_COUNT,

40 };

42 /* event thread connection state */

43 enum {

44 ST_DISCONNECTED,

45 ST_CONNECT_PENDING,

46 ST_CONNECTED,

47 ST_DISCONNECT_PENDING,

48 ST_DISPLAY_OFF,

49 ST_SUSPENDED,

50 };

52 enum {

53 EV_NO_EVENT,

54 /* hpd events */

55 EV_HPD_INIT_SETUP,

56 EV_HPD_PLUG_INT,

57 EV_IRQ_HPD_INT,

58 EV_HPD_REPLUG_INT,

59 EV_HPD_UNPLUG_INT,

60 EV_USER_NOTIFICATION,

61 EV_CONNECT_PENDING_TIMEOUT,

62 EV_DISCONNECT_PENDING_TIMEOUT,

63 };

65 #define EVENT_TIMEOUT (HZ/10) /* 100ms */

66 #define DP_EVENT_Q_MAX 8

68 #define DP_TIMEOUT_5_SECOND (5000/EVENT_TIMEOUT)

69 #define DP_TIMEOUT_NONE 0

71 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)

73 struct dp_event {

74 u32 event_id;

75 u32 data;

76 u32 delay;

77 };

79 struct dp_display_private {

80 char *name;

81 int irq;

83 /* state variables */

84 bool core_initialized;

85 bool hpd_irq_on;

86 bool audio_supported;

88 struct platform_device *pdev;

89 struct dentry *root;

91 struct dp_usbpd *usbpd;

92 struct dp_parser *parser;

93 struct dp_power *power;

94 struct dp_catalog *catalog;

95 struct drm_dp_aux *aux;

96 struct dp_link *link;

97 struct dp_panel *panel;

98 struct dp_ctrl *ctrl;

99 struct dp_debug *debug;

100

101 struct dp_usbpd_cb usbpd_cb;

102 struct dp_display_mode dp_mode;

103 struct msm_dp dp_display;

104

105 /* wait for audio signaling */

106 struct completion audio_comp;

107

108 /* event related only access by event thread */

109 struct mutex event_mutex;

110 wait_queue_head_t event_q;

111 u32 hpd_state;

112 u32 event_pndx;

113 u32 event_gndx;

114 struct dp_event event_list[DP_EVENT_Q_MAX];

115 spinlock_t event_lock;

116

117 struct dp_audio *audio;

118 };

119

120 static const struct of_device_id dp_dt_match[] = {

121 {.compatible = "qcom,sc7180-dp"},

122 {}

123 };

124

125 static int dp_add_event(struct dp_display_private *dp_priv, u32 event,

126 u32 data, u32 delay)

127 {

128 unsigned long flag;

129 struct dp_event *todo;

130 int pndx;

131

132 spin_lock_irqsave(&dp_priv->event_lock, flag);

133 pndx = dp_priv->event_pndx + 1;

134 pndx %= DP_EVENT_Q_MAX;

135 if (pndx == dp_priv->event_gndx) {

136 pr_err("event_q is full: pndx=%d gndx=%d\n",

137 dp_priv->event_pndx, dp_priv->event_gndx);

138 spin_unlock_irqrestore(&dp_priv->event_lock, flag);

139 return -EPERM;

140 }

141 todo = &dp_priv->event_list[dp_priv->event_pndx++];

142 dp_priv->event_pndx %= DP_EVENT_Q_MAX;

143 todo->event_id = event;

144 todo->data = data;

145 todo->delay = delay;

146 wake_up(&dp_priv->event_q);

147 spin_unlock_irqrestore(&dp_priv->event_lock, flag);

148

149 return 0;

150 }

151

152 static int dp_del_event(struct dp_display_private *dp_priv, u32 event)

153 {

154 unsigned long flag;

155 struct dp_event *todo;

156 u32 gndx;

157

158 spin_lock_irqsave(&dp_priv->event_lock, flag);

159 if (dp_priv->event_pndx == dp_priv->event_gndx) {

160 spin_unlock_irqrestore(&dp_priv->event_lock, flag);

161 return -ENOENT;

162 }

163

164 gndx = dp_priv->event_gndx;

165 while (dp_priv->event_pndx != gndx) {

166 todo = &dp_priv->event_list[gndx];

167 if (todo->event_id == event) {

168 todo->event_id = EV_NO_EVENT; /* deleted */

169 todo->delay = 0;

170 }

171 gndx++;

172 gndx %= DP_EVENT_Q_MAX;

173 }

174 spin_unlock_irqrestore(&dp_priv->event_lock, flag);

175

176 return 0;

177 }

178

179 void dp_display_signal_audio_start(struct msm_dp *dp_display)

180 {

181 struct dp_display_private *dp;

182

183 dp = container_of(dp_display, struct dp_display_private, dp_display);

184

185 reinit_completion(&dp->audio_comp);

186 }

187

188 void dp_display_signal_audio_complete(struct msm_dp *dp_display)

189 {

190 struct dp_display_private *dp;

191

192 dp = container_of(dp_display, struct dp_display_private, dp_display);

193

194 complete_all(&dp->audio_comp);

195 }

196

197 static int dp_display_bind(struct device *dev, struct device *master,

198 void *data)

199 {

200 int rc = 0;

201 struct dp_display_private *dp;

202 struct drm_device *drm;

203 struct msm_drm_private *priv;

204

205 drm = dev_get_drvdata(master);

206

207 dp = container_of(g_dp_display,

208 struct dp_display_private, dp_display);

209

210 dp->dp_display.drm_dev = drm;

211 priv = drm->dev_private;

212 priv->dp = &(dp->dp_display);

213

214 rc = dp->parser->parse(dp->parser);

215 if (rc) {

216 DRM_ERROR("device tree parsing failed\n");

217 goto end;

218 }

219

220 rc = dp_aux_register(dp->aux);

221 if (rc) {

222 DRM_ERROR("DRM DP AUX register failed\n");

223 goto end;

224 }

225

226 rc = dp_power_client_init(dp->power);

227 if (rc) {

228 DRM_ERROR("Power client create failed\n");

229 goto end;

230 }

231

232 rc = dp_register_audio_driver(dev, dp->audio);

233 if (rc)

234 DRM_ERROR("Audio registration Dp failed\n");

235

236 end:

237 return rc;

238 }

239

240 static void dp_display_unbind(struct device *dev, struct device *master,

241 void *data)

242 {

243 struct dp_display_private *dp;

244 struct drm_device *drm = dev_get_drvdata(master);

245 struct msm_drm_private *priv = drm->dev_private;

246

247 dp = container_of(g_dp_display,

248 struct dp_display_private, dp_display);

249

250 dp_power_client_deinit(dp->power);

251 dp_aux_unregister(dp->aux);

252 priv->dp = NULL;

253 }

254

255 static const struct component_ops dp_display_comp_ops = {

256 .bind = dp_display_bind,

257 .unbind = dp_display_unbind,

258 };

259

260 static bool dp_display_is_ds_bridge(struct dp_panel *panel)

261 {

262 return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &

263 DP_DWN_STRM_PORT_PRESENT);

264 }

265

266 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)

267 {

268 return dp_display_is_ds_bridge(dp->panel) &&

269 (dp->link->sink_count == 0);

270 }

271

272 static void dp_display_send_hpd_event(struct msm_dp *dp_display)

273 {

274 struct dp_display_private *dp;

275 struct drm_connector *connector;

276

277 dp = container_of(dp_display, struct dp_display_private, dp_display);

278

279 connector = dp->dp_display.connector;

280 drm_helper_hpd_irq_event(connector->dev);

281 }

282

283

284 static int dp_display_send_hpd_notification(struct dp_display_private *dp,

285 bool hpd)

286 {

287 if ((hpd && dp->dp_display.is_connected) ||

288 (!hpd && !dp->dp_display.is_connected)) {

289 DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));

290 return 0;

291 }

292

293 /* reset video pattern flag on disconnect */

294 if (!hpd)

295 dp->panel->video_test = false;

296

297 dp->dp_display.is_connected = hpd;

298

299 dp_display_send_hpd_event(&dp->dp_display);

300

301 return 0;

302 }

303

304 static int dp_display_process_hpd_high(struct dp_display_private *dp)

305 {

306 int rc = 0;

307 struct edid *edid;

308

309 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;

310

311 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);

312 if (rc)

313 goto end;

314

315 dp_link_process_request(dp->link);

316

317 edid = dp->panel->edid;

318

319 dp->audio_supported = drm_detect_monitor_audio(edid);

320 dp_panel_handle_sink_request(dp->panel);

321

322 dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;

323 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;

324

325 /*

326 * set sink to normal operation mode -- D0

327 * before dpcd read

328 */

329 dp_link_psm_config(dp->link, &dp->panel->link_info, false);

330

331 dp_link_reset_phy_params_vx_px(dp->link);

332 rc = dp_ctrl_on_link(dp->ctrl);

333 if (rc) {

334 DRM_ERROR("failed to complete DP link training\n");

335 goto end;

336 }

337

338 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);

339

340 end:

341 return rc;

342 }

343

344 static void dp_display_host_init(struct dp_display_private *dp, int reset)

345 {

346 bool flip = false;

347

348 if (dp->core_initialized) {

349 DRM_DEBUG_DP("DP core already initialized\n");

350 return;

351 }

352

353 if (dp->usbpd->orientation == ORIENTATION_CC2)

354 flip = true;

355

356 dp_power_init(dp->power, flip);

357 dp_ctrl_host_init(dp->ctrl, flip, reset);

358 dp_aux_init(dp->aux);

359 dp->core_initialized = true;

360 }

361

362 static void dp_display_host_deinit(struct dp_display_private *dp)

363 {

364 if (!dp->core_initialized) {

365 DRM_DEBUG_DP("DP core not initialized\n");

366 return;

367 }

368

369 dp_ctrl_host_deinit(dp->ctrl);

370 dp_aux_deinit(dp->aux);

371 dp_power_deinit(dp->power);

372

373 dp->core_initialized = false;

374 }

375

376 static int dp_display_usbpd_configure_cb(struct device *dev)

377 {

378 int rc = 0;

379 struct dp_display_private *dp;

380

381 if (!dev) {

382 DRM_ERROR("invalid dev\n");

383 rc = -EINVAL;

384 goto end;

385 }

386

387 dp = container_of(g_dp_display,

388 struct dp_display_private, dp_display);

389

390 dp_display_host_init(dp, false);

391

392 rc = dp_display_process_hpd_high(dp);

393 end:

394 return rc;

395 }

396

397 static int dp_display_usbpd_disconnect_cb(struct device *dev)

398 {

399 int rc = 0;

400 struct dp_display_private *dp;

401

402 if (!dev) {

403 DRM_ERROR("invalid dev\n");

404 rc = -EINVAL;

405 return rc;

406 }

407

408 dp = container_of(g_dp_display,

409 struct dp_display_private, dp_display);

410

411 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);

412

413 return rc;

414 }

415

416 static void dp_display_handle_video_request(struct dp_display_private *dp)

417 {

418 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {

419 dp->panel->video_test = true;

420 dp_link_send_test_response(dp->link);

421 }

422 }

423

424 static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)

425 {

426 int rc = 0;

427

428 if (dp_display_is_sink_count_zero(dp)) {

429 DRM_DEBUG_DP("sink count is zero, nothing to do\n");

430 if (dp->hpd_state != ST_DISCONNECTED) {

431 dp->hpd_state = ST_DISCONNECT_PENDING;

432 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);

433 }

434 } else {

435 if (dp->hpd_state == ST_DISCONNECTED) {

436 dp->hpd_state = ST_CONNECT_PENDING;

437 rc = dp_display_process_hpd_high(dp);

438 if (rc)

439 dp->hpd_state = ST_DISCONNECTED;

440 }

441 }

442

443 return rc;

444 }

445

446 static int dp_display_handle_irq_hpd(struct dp_display_private *dp)

447 {

448 u32 sink_request = dp->link->sink_request;

449

450 if (dp->hpd_state == ST_DISCONNECTED) {

451 if (sink_request & DP_LINK_STATUS_UPDATED) {

452 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");

453 return -EINVAL;

454 }

455 }

456

457 dp_ctrl_handle_sink_request(dp->ctrl);

458

459 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)

460 dp_display_handle_video_request(dp);

461

462 return 0;

463 }

464

465 static int dp_display_usbpd_attention_cb(struct device *dev)

466 {

467 int rc = 0;

468 u32 sink_request;

469 struct dp_display_private *dp;

470

471 if (!dev) {

472 DRM_ERROR("invalid dev\n");

473 return -EINVAL;

474 }

475

476 dp = container_of(g_dp_display,

477 struct dp_display_private, dp_display);

478

479 /* check for any test request issued by sink */

480 rc = dp_link_process_request(dp->link);

481 if (!rc) {

482 sink_request = dp->link->sink_request;

483 if (sink_request & DS_PORT_STATUS_CHANGED)

484 rc = dp_display_handle_port_ststus_changed(dp);

485 else

486 rc = dp_display_handle_irq_hpd(dp);

487 }

488

489 return rc;

490 }

491

492 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)

493 {

494 struct dp_usbpd *hpd = dp->usbpd;

495 u32 state;

496 u32 tout = DP_TIMEOUT_5_SECOND;

497 int ret;

498

499 if (!hpd)

500 return 0;

501

502 mutex_lock(&dp->event_mutex);

503

504 state = dp->hpd_state;

505 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {

506 mutex_unlock(&dp->event_mutex);

507 return 0;

508 }

509

510 if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {

511 mutex_unlock(&dp->event_mutex);

512 return 0;

513 }

514

515 if (state == ST_DISCONNECT_PENDING) {

516 /* wait until ST_DISCONNECTED */

517 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */

518 mutex_unlock(&dp->event_mutex);

519 return 0;

520 }

521

522 dp->hpd_state = ST_CONNECT_PENDING;

523

524 hpd->hpd_high = 1;

525

526 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);

527 if (ret) { /* link train failed */

528 hpd->hpd_high = 0;

529 dp->hpd_state = ST_DISCONNECTED;

530

531 if (ret == -ECONNRESET) { /* cable unplugged */

532 dp->core_initialized = false;

533 }

534

535 } else {

536 /* start sentinel checking in case of missing uevent */

537 dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);

538 }

539

540 /* enable HDP irq_hpd/replug interrupt */

541 dp_catalog_hpd_config_intr(dp->catalog,

542 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true);

543

544 mutex_unlock(&dp->event_mutex);

545

546 /* uevent will complete connection part */

547 return 0;

548 };

549

550 static int dp_display_enable(struct dp_display_private *dp, u32 data);

551 static int dp_display_disable(struct dp_display_private *dp, u32 data);

552

553 static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)

554 {

555 u32 state;

556

557 mutex_lock(&dp->event_mutex);

558

559 state = dp->hpd_state;

560 if (state == ST_CONNECT_PENDING)

561 dp->hpd_state = ST_CONNECTED;

562

563 mutex_unlock(&dp->event_mutex);

564

565 return 0;

566 }

567

568 static void dp_display_handle_plugged_change(struct msm_dp *dp_display,

569 bool plugged)

570 {

571 struct dp_display_private *dp;

572

573 dp = container_of(dp_display,

574 struct dp_display_private, dp_display);

575

576 /* notify audio subsystem only if sink supports audio */

577 if (dp_display->plugged_cb && dp_display->codec_dev &&

578 dp->audio_supported)

579 dp_display->plugged_cb(dp_display->codec_dev, plugged);

580 }

581

582 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)

583 {

584 struct dp_usbpd *hpd = dp->usbpd;

585 u32 state;

586

587 if (!hpd)

588 return 0;

589

590 mutex_lock(&dp->event_mutex);

591

592 state = dp->hpd_state;

593

594 /* disable irq_hpd/replug interrupts */

595 dp_catalog_hpd_config_intr(dp->catalog,

596 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false);

597

598 /* unplugged, no more irq_hpd handle */

599 dp_del_event(dp, EV_IRQ_HPD_INT);

600

601 if (state == ST_DISCONNECTED) {

602 /* triggered by irq_hdp with sink_count = 0 */

603 if (dp->link->sink_count == 0) {

604 dp_ctrl_off_phy(dp->ctrl);

605 hpd->hpd_high = 0;

606 dp->core_initialized = false;

607 }

608 mutex_unlock(&dp->event_mutex);

609 return 0;

610 }

611

612 if (state == ST_DISCONNECT_PENDING) {

613 mutex_unlock(&dp->event_mutex);

614 return 0;

615 }

616

617 if (state == ST_CONNECT_PENDING) {

618 /* wait until CONNECTED */

619 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */

620 mutex_unlock(&dp->event_mutex);

621 return 0;

622 }

623

624 dp->hpd_state = ST_DISCONNECT_PENDING;

625

626 /* disable HPD plug interrupts */

627 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);

628

629 hpd->hpd_high = 0;

630

631 /*

632 * We don't need separate work for disconnect as

633 * connect/attention interrupts are disabled

634 */

635 dp_display_usbpd_disconnect_cb(&dp->pdev->dev);

636

637 /* start sentinel checking in case of missing uevent */

638 dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);

639

640 /* signal the disconnect event early to ensure proper teardown */

641 dp_display_handle_plugged_change(g_dp_display, false);

642

643 /* enable HDP plug interrupt to prepare for next plugin */

644 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);

645

646 /* uevent will complete disconnection part */

647 mutex_unlock(&dp->event_mutex);

648 return 0;

649 }

650

651 static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)

652 {

653 u32 state;

654

655 mutex_lock(&dp->event_mutex);

656

657 state = dp->hpd_state;

658 if (state == ST_DISCONNECT_PENDING)

659 dp->hpd_state = ST_DISCONNECTED;

660

661 mutex_unlock(&dp->event_mutex);

662

663 return 0;

664 }

665

666 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)

667 {

668 u32 state;

669 int ret;

670

671 mutex_lock(&dp->event_mutex);

672

673 /* irq_hpd can happen at either connected or disconnected state */

674 state = dp->hpd_state;

675 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {

676 mutex_unlock(&dp->event_mutex);

677 return 0;

678 }

679

680 if (state == ST_CONNECT_PENDING) {

681 /* wait until ST_CONNECTED */

682 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */

683 mutex_unlock(&dp->event_mutex);

684 return 0;

685 }

686

687 if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {

688 /* wait until ST_CONNECTED */

689 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */

690 mutex_unlock(&dp->event_mutex);

691 return 0;

692 }

693

694 ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);

695 if (ret == -ECONNRESET) { /* cable unplugged */

696 dp->core_initialized = false;

697 }

698

699 mutex_unlock(&dp->event_mutex);

700

701 return 0;

702 }

703

704 static void dp_display_deinit_sub_modules(struct dp_display_private *dp)

705 {

706 dp_debug_put(dp->debug);

707 dp_panel_put(dp->panel);

708 dp_aux_put(dp->aux);

709 dp_audio_put(dp->audio);

710 }

711

712 static int dp_init_sub_modules(struct dp_display_private *dp)

713 {

714 int rc = 0;

715 struct device *dev = &dp->pdev->dev;

716 struct dp_usbpd_cb *cb = &dp->usbpd_cb;

717 struct dp_panel_in panel_in = {

718 .dev = dev,

719 };

720

721 /* Callback APIs used for cable status change event */

722 cb->configure = dp_display_usbpd_configure_cb;

723 cb->disconnect = dp_display_usbpd_disconnect_cb;

724 cb->attention = dp_display_usbpd_attention_cb;

725

726 dp->usbpd = dp_hpd_get(dev, cb);

727 if (IS_ERR(dp->usbpd)) {

728 rc = PTR_ERR(dp->usbpd);

729 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);

730 dp->usbpd = NULL;

731 goto error;

732 }

733

734 dp->parser = dp_parser_get(dp->pdev);

735 if (IS_ERR(dp->parser)) {

736 rc = PTR_ERR(dp->parser);

737 DRM_ERROR("failed to initialize parser, rc = %d\n", rc);

738 dp->parser = NULL;

739 goto error;

740 }

741

742 dp->catalog = dp_catalog_get(dev, &dp->parser->io);

743 if (IS_ERR(dp->catalog)) {

744 rc = PTR_ERR(dp->catalog);

745 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);

746 dp->catalog = NULL;

747 goto error;

748 }

749

750 dp->power = dp_power_get(dev, dp->parser);

751 if (IS_ERR(dp->power)) {

752 rc = PTR_ERR(dp->power);

753 DRM_ERROR("failed to initialize power, rc = %d\n", rc);

754 dp->power = NULL;

755 goto error;

756 }

757

758 dp->aux = dp_aux_get(dev, dp->catalog);

759 if (IS_ERR(dp->aux)) {

760 rc = PTR_ERR(dp->aux);

761 DRM_ERROR("failed to initialize aux, rc = %d\n", rc);

762 dp->aux = NULL;

763 goto error;

764 }

765

766 dp->link = dp_link_get(dev, dp->aux);

767 if (IS_ERR(dp->link)) {

768 rc = PTR_ERR(dp->link);

769 DRM_ERROR("failed to initialize link, rc = %d\n", rc);

770 dp->link = NULL;

771 goto error_link;

772 }

773

774 panel_in.aux = dp->aux;

775 panel_in.catalog = dp->catalog;

776 panel_in.link = dp->link;

777

778 dp->panel = dp_panel_get(&panel_in);

779 if (IS_ERR(dp->panel)) {

780 rc = PTR_ERR(dp->panel);

781 DRM_ERROR("failed to initialize panel, rc = %d\n", rc);

782 dp->panel = NULL;

783 goto error_link;

784 }

785

786 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,

787 dp->power, dp->catalog, dp->parser);

788 if (IS_ERR(dp->ctrl)) {

789 rc = PTR_ERR(dp->ctrl);

790 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);

791 dp->ctrl = NULL;

792 goto error_ctrl;

793 }

794

795 dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);

796 if (IS_ERR(dp->audio)) {

797 rc = PTR_ERR(dp->audio);

798 pr_err("failed to initialize audio, rc = %d\n", rc);

799 dp->audio = NULL;

800 goto error_ctrl;

801 }

802

803 return rc;

804

805 error_ctrl:

806 dp_panel_put(dp->panel);

807 error_link:

808 dp_aux_put(dp->aux);

809 error:

810 return rc;

811 }

812

813 static int dp_display_set_mode(struct msm_dp *dp_display,

814 struct dp_display_mode *mode)

815 {

816 struct dp_display_private *dp;

817

818 dp = container_of(dp_display, struct dp_display_private, dp_display);

819

820 dp->panel->dp_mode.drm_mode = mode->drm_mode;

821 dp->panel->dp_mode.bpp = mode->bpp;

822 dp->panel->dp_mode.capabilities = mode->capabilities;

823 dp_panel_init_panel_info(dp->panel);

824 return 0;

825 }

826

827 static int dp_display_prepare(struct msm_dp *dp)

828 {

829 return 0;

830 }

831

832 static int dp_display_enable(struct dp_display_private *dp, u32 data)

833 {

834 int rc = 0;

835 struct msm_dp *dp_display;

836

837 dp_display = g_dp_display;

838

839 if (dp_display->power_on) {

840 DRM_DEBUG_DP("Link already setup, return\n");

841 return 0;

842 }

843

844 rc = dp_ctrl_on_stream(dp->ctrl);

845 if (!rc)

846 dp_display->power_on = true;

847

848 return rc;

849 }

850

851 static int dp_display_post_enable(struct msm_dp *dp_display)

852 {

853 struct dp_display_private *dp;

854 u32 rate;

855

856 dp = container_of(dp_display, struct dp_display_private, dp_display);

857

858 rate = dp->link->link_params.rate;

859

860 if (dp->audio_supported) {

861 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);

862 dp->audio->lane_count = dp->link->link_params.num_lanes;

863 }

864

865 /* signal the connect event late to synchronize video and display */

866 dp_display_handle_plugged_change(dp_display, true);

867 return 0;

868 }

869

870 static int dp_display_disable(struct dp_display_private *dp, u32 data)

871 {

872 struct msm_dp *dp_display;

873

874 dp_display = g_dp_display;

875

876 if (!dp_display->power_on)

877 return 0;

878

879 /* wait only if audio was enabled */

880 if (dp_display->audio_enabled) {

881 /* signal the disconnect event */

882 dp_display_handle_plugged_change(dp_display, false);

883 if (!wait_for_completion_timeout(&dp->audio_comp,

884 HZ * 5))

885 DRM_ERROR("audio comp timeout\n");

886 }

887

888 dp_display->audio_enabled = false;

889

890 /* triggered by irq_hpd with sink_count = 0 */

891 if (dp->link->sink_count == 0) {

892 dp_ctrl_off_link_stream(dp->ctrl);

893 } else {

894 dp_ctrl_off(dp->ctrl);

895 dp->core_initialized = false;

896 }

897

898 dp_display->power_on = false;

899

900 return 0;

901 }

902

903 static int dp_display_unprepare(struct msm_dp *dp)

904 {

905 return 0;

906 }

907

908 int dp_display_set_plugged_cb(struct msm_dp *dp_display,

909 hdmi_codec_plugged_cb fn, struct device *codec_dev)

910 {

911 bool plugged;

912

913 dp_display->plugged_cb = fn;

914 dp_display->codec_dev = codec_dev;

915 plugged = dp_display->is_connected;

916 dp_display_handle_plugged_change(dp_display, plugged);

917

918 return 0;

919 }

920

921 int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)

922 {

923 const u32 num_components = 3, default_bpp = 24;

924 struct dp_display_private *dp_display;

925 struct dp_link_info *link_info;

926 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;

927

928 if (!dp || !mode_pclk_khz || !dp->connector) {

929 DRM_ERROR("invalid params\n");

930 return -EINVAL;

931 }

932

933 dp_display = container_of(dp, struct dp_display_private, dp_display);

934 link_info = &dp_display->panel->link_info;

935

936 mode_bpp = dp->connector->display_info.bpc * num_components;

937 if (!mode_bpp)

938 mode_bpp = default_bpp;

939

940 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,

941 mode_bpp, mode_pclk_khz);

942

943 mode_rate_khz = mode_pclk_khz * mode_bpp;

944 supported_rate_khz = link_info->num_lanes * link_info->rate * 8;

945

946 if (mode_rate_khz > supported_rate_khz)

947 return MODE_BAD;

948

949 return MODE_OK;

950 }

951

952 int dp_display_get_modes(struct msm_dp *dp,

953 struct dp_display_mode *dp_mode)

954 {

955 struct dp_display_private *dp_display;

956 int ret = 0;

957

958 if (!dp) {

959 DRM_ERROR("invalid params\n");

960 return 0;

961 }

962

963 dp_display = container_of(dp, struct dp_display_private, dp_display);

964

965 ret = dp_panel_get_modes(dp_display->panel,

966 dp->connector, dp_mode);

967 if (dp_mode->drm_mode.clock)

968 dp->max_pclk_khz = dp_mode->drm_mode.clock;

969 return ret;

970 }

971

972 bool dp_display_check_video_test(struct msm_dp *dp)

973 {

974 struct dp_display_private *dp_display;

975

976 dp_display = container_of(dp, struct dp_display_private, dp_display);

977

978 return dp_display->panel->video_test;

979 }

980

981 int dp_display_get_test_bpp(struct msm_dp *dp)

982 {

983 struct dp_display_private *dp_display;

984

985 if (!dp) {

986 DRM_ERROR("invalid params\n");

987 return 0;

988 }

989

990 dp_display = container_of(dp, struct dp_display_private, dp_display);

991

992 return dp_link_bit_depth_to_bpp(

993 dp_display->link->test_video.test_bit_depth);

994 }

995

996 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)

997 {

998 struct dp_display_private *dp_display;

999 struct drm_device *drm;

1000

1001 dp_display = container_of(dp, struct dp_display_private, dp_display);

1002 drm = dp->drm_dev;

1003

1004 /*

1005 * if we are reading registers we need the link clocks to be on

1006 * however till DP cable is connected this will not happen as we

1007 * do not know the resolution to power up with. Hence check the

1008 * power_on status before dumping DP registers to avoid crash due

1009 * to unclocked access

1010 */

1011 mutex_lock(&dp_display->event_mutex);

1012

1013 if (!dp->power_on) {

1014 mutex_unlock(&dp_display->event_mutex);

1015 return;

1016 }

1017

1018 dp_catalog_snapshot(dp_display->catalog, disp_state);

1019

1020 mutex_unlock(&dp_display->event_mutex);

1021 }

1022

1023 static void dp_display_config_hpd(struct dp_display_private *dp)

1024 {

1025

1026 dp_display_host_init(dp, true);

1027 dp_catalog_ctrl_hpd_config(dp->catalog);

1028

1029 /* Enable interrupt first time

1030 * we are leaving dp clocks on during disconnect

1031 * and never disable interrupt

1032 */

1033 enable_irq(dp->irq);

1034 }

1035

1036 static int hpd_event_thread(void *data)

1037 {

1038 struct dp_display_private *dp_priv;

1039 unsigned long flag;

1040 struct dp_event *todo;

1041 int timeout_mode = 0;

1042

1043 dp_priv = (struct dp_display_private *)data;

1044

1045 while (1) {

1046 if (timeout_mode) {

1047 wait_event_timeout(dp_priv->event_q,

1048 (dp_priv->event_pndx == dp_priv->event_gndx),

1049 EVENT_TIMEOUT);

1050 } else {

1051 wait_event_interruptible(dp_priv->event_q,

1052 (dp_priv->event_pndx != dp_priv->event_gndx));

1053 }

1054 spin_lock_irqsave(&dp_priv->event_lock, flag);

1055 todo = &dp_priv->event_list[dp_priv->event_gndx];

1056 if (todo->delay) {

1057 struct dp_event *todo_next;

1058

1059 dp_priv->event_gndx++;

1060 dp_priv->event_gndx %= DP_EVENT_Q_MAX;

1061

1062 /* re enter delay event into q */

1063 todo_next = &dp_priv->event_list[dp_priv->event_pndx++];

1064 dp_priv->event_pndx %= DP_EVENT_Q_MAX;

1065 todo_next->event_id = todo->event_id;

1066 todo_next->data = todo->data;

1067 todo_next->delay = todo->delay - 1;

1068

1069 /* clean up older event */

1070 todo->event_id = EV_NO_EVENT;

1071 todo->delay = 0;

1072

1073 /* switch to timeout mode */

1074 timeout_mode = 1;

1075 spin_unlock_irqrestore(&dp_priv->event_lock, flag);

1076 continue;

1077 }

1078

1079 /* timeout with no events in q */

1080 if (dp_priv->event_pndx == dp_priv->event_gndx) {

1081 spin_unlock_irqrestore(&dp_priv->event_lock, flag);

1082 continue;

1083 }

1084

1085 dp_priv->event_gndx++;

1086 dp_priv->event_gndx %= DP_EVENT_Q_MAX;

1087 timeout_mode = 0;

1088 spin_unlock_irqrestore(&dp_priv->event_lock, flag);

1089

1090 switch (todo->event_id) {

1091 case EV_HPD_INIT_SETUP:

1092 dp_display_config_hpd(dp_priv);

1093 break;

1094 case EV_HPD_PLUG_INT:

1095 dp_hpd_plug_handle(dp_priv, todo->data);

1096 break;

1097 case EV_HPD_UNPLUG_INT:

1098 dp_hpd_unplug_handle(dp_priv, todo->data);

1099 break;

1100 case EV_IRQ_HPD_INT:

1101 dp_irq_hpd_handle(dp_priv, todo->data);

1102 break;

1103 case EV_HPD_REPLUG_INT:

1104 /* do nothing */

1105 break;

1106 case EV_USER_NOTIFICATION:

1107 dp_display_send_hpd_notification(dp_priv,

1108 todo->data);

1109 break;

1110 case EV_CONNECT_PENDING_TIMEOUT:

1111 dp_connect_pending_timeout(dp_priv,

1112 todo->data);

1113 break;

1114 case EV_DISCONNECT_PENDING_TIMEOUT:

1115 dp_disconnect_pending_timeout(dp_priv,

1116 todo->data);

1117 break;

1118 default:

1119 break;

1120 }

1121 }

1122

1123 return 0;

1124 }

1125

1126 static void dp_hpd_event_setup(struct dp_display_private *dp_priv)

1127 {

1128 init_waitqueue_head(&dp_priv->event_q);

1129 spin_lock_init(&dp_priv->event_lock);

1130

1131 kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");

1132 }

1133

1134 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)

1135 {

1136 struct dp_display_private *dp = dev_id;

1137 irqreturn_t ret = IRQ_HANDLED;

1138 u32 hpd_isr_status;

1139

1140 if (!dp) {

1141 DRM_ERROR("invalid data\n");

1142 return IRQ_NONE;

1143 }

1144

1145 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);

1146

1147 if (hpd_isr_status & 0x0F) {

1148 /* hpd related interrupts */

1149 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK ||

1150 hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {

1151 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);

1152 }

1153

1154 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {

1155 /* stop sentinel connect pending checking */

1156 dp_del_event(dp, EV_CONNECT_PENDING_TIMEOUT);

1157 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);

1158 }

1159

1160 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK)

1161 dp_add_event(dp, EV_HPD_REPLUG_INT, 0, 0);

1162

1163 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)

1164 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);

1165 }

1166

1167 /* DP controller isr */

1168 dp_ctrl_isr(dp->ctrl);

1169

1170 /* DP aux isr */

1171 dp_aux_isr(dp->aux);

1172

1173 return ret;

1174 }

1175

1176 int dp_display_request_irq(struct msm_dp *dp_display)

1177 {

1178 int rc = 0;

1179 struct dp_display_private *dp;

1180

1181 if (!dp_display) {

1182 DRM_ERROR("invalid input\n");

1183 return -EINVAL;

1184 }

1185

1186 dp = container_of(dp_display, struct dp_display_private, dp_display);

1187

1188 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);

1189 if (dp->irq < 0) {

1190 rc = dp->irq;

1191 DRM_ERROR("failed to get irq: %d\n", rc);

1192 return rc;

1193 }

1194

1195 rc = devm_request_irq(&dp->pdev->dev, dp->irq,

1196 dp_display_irq_handler,

1197 IRQF_TRIGGER_HIGH, "dp_display_isr", dp);

1198 if (rc < 0) {

1199 DRM_ERROR("failed to request IRQ%u: %d\n",

1200 dp->irq, rc);

1201 return rc;

1202 }

1203 disable_irq(dp->irq);

1204

1205 return 0;

1206 }

1207

1208 static int dp_display_probe(struct platform_device *pdev)

1209 {

1210 int rc = 0;

1211 struct dp_display_private *dp;

1212

1213 if (!pdev || !pdev->dev.of_node) {

1214 DRM_ERROR("pdev not found\n");

1215 return -ENODEV;

1216 }

1217

1218 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);

1219 if (!dp)

1220 return -ENOMEM;

1221

1222 dp->pdev = pdev;

1223 dp->name = "drm_dp";

1224

1225 rc = dp_init_sub_modules(dp);

1226 if (rc) {

1227 DRM_ERROR("init sub module failed\n");

1228 return -EPROBE_DEFER;

1229 }

1230

1231 mutex_init(&dp->event_mutex);

1232 g_dp_display = &dp->dp_display;

1233

1234 /* Store DP audio handle inside DP display */

1235 g_dp_display->dp_audio = dp->audio;

1236

1237 init_completion(&dp->audio_comp);

1238

1239 platform_set_drvdata(pdev, g_dp_display);

1240

1241 rc = component_add(&pdev->dev, &dp_display_comp_ops);

1242 if (rc) {

1243 DRM_ERROR("component add failed, rc=%d\n", rc);

1244 dp_display_deinit_sub_modules(dp);

1245 }

1246

1247 return rc;

1248 }

1249

1250 static int dp_display_remove(struct platform_device *pdev)

1251 {

1252 struct dp_display_private *dp;

1253

1254 dp = container_of(g_dp_display,

1255 struct dp_display_private, dp_display);

1256

1257 dp_display_deinit_sub_modules(dp);

1258

1259 component_del(&pdev->dev, &dp_display_comp_ops);

1260 platform_set_drvdata(pdev, NULL);

1261

1262 return 0;

1263 }

1264

1265 static int dp_pm_resume(struct device *dev)

1266 {

1267 struct platform_device *pdev = to_platform_device(dev);

1268 struct msm_dp *dp_display = platform_get_drvdata(pdev);

1269 struct dp_display_private *dp;

1270 u32 status;

1271

1272 dp = container_of(dp_display, struct dp_display_private, dp_display);

1273

1274 mutex_lock(&dp->event_mutex);

1275

1276 /* start from disconnected state */

1277 dp->hpd_state = ST_DISCONNECTED;

1278

1279 /* turn on dp ctrl/phy */

1280 dp_display_host_init(dp, true);

1281

1282 dp_catalog_ctrl_hpd_config(dp->catalog);

1283

1284 status = dp_catalog_link_is_connected(dp->catalog);

1285

1286 /*

1287 * can not declared display is connected unless

1288 * HDMI cable is plugged in and sink_count of

1289 * dongle become 1

1290 */

1291 if (status && dp->link->sink_count)

1292 dp->dp_display.is_connected = true;

1293 else

1294 dp->dp_display.is_connected = false;

1295

1296 mutex_unlock(&dp->event_mutex);

1297

1298 return 0;

1299 }

1300

1301 static int dp_pm_suspend(struct device *dev)

1302 {

1303 struct platform_device *pdev = to_platform_device(dev);

1304 struct msm_dp *dp_display = platform_get_drvdata(pdev);

1305 struct dp_display_private *dp;

1306

1307 dp = container_of(dp_display, struct dp_display_private, dp_display);

1308

1309 mutex_lock(&dp->event_mutex);

1310

1311 if (dp->core_initialized == true) {

1312 /* mainlink enabled */

1313 if (dp_power_clk_status(dp->power, DP_CTRL_PM))

1314 dp_ctrl_off_link_stream(dp->ctrl);

1315

1316 dp_display_host_deinit(dp);

1317 }

1318

1319 dp->hpd_state = ST_SUSPENDED;

1320

1321 /* host_init will be called at pm_resume */

1322 dp->core_initialized = false;

1323

1324 mutex_unlock(&dp->event_mutex);

1325

1326 return 0;

1327 }

1328

1329 static int dp_pm_prepare(struct device *dev)

1330 {

1331 return 0;

1332 }

1333

1334 static void dp_pm_complete(struct device *dev)

1335 {

1336

1337 }

1338

1339 static const struct dev_pm_ops dp_pm_ops = {

1340 .suspend = dp_pm_suspend,

1341 .resume = dp_pm_resume,

1342 .prepare = dp_pm_prepare,

1343 .complete = dp_pm_complete,

1344 };

1345

1346 static struct platform_driver dp_display_driver = {

1347 .probe = dp_display_probe,

1348 .remove = dp_display_remove,

1349 .driver = {

1350 .name = "msm-dp-display",

1351 .of_match_table = dp_dt_match,

1352 .suppress_bind_attrs = true,

1353 .pm = &dp_pm_ops,

1354 },

1355 };

1356

1357 int __init msm_dp_register(void)

1358 {

1359 int ret;

1360

1361 ret = platform_driver_register(&dp_display_driver);

1362 if (ret)

1363 DRM_ERROR("Dp display driver register failed");

1364

1365 return ret;

1366 }

1367

1368 void __exit msm_dp_unregister(void)

1369 {

1370 platform_driver_unregister(&dp_display_driver);

1371 }

1372

1373 void msm_dp_irq_postinstall(struct msm_dp *dp_display)

1374 {

1375 struct dp_display_private *dp;

1376

1377 if (!dp_display)

1378 return;

1379

1380 dp = container_of(dp_display, struct dp_display_private, dp_display);

1381

1382 dp_hpd_event_setup(dp);

1383

1384 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);

1385 }

1386

1387 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)

1388 {

1389 struct dp_display_private *dp;

1390 struct device *dev;

1391 int rc;

1392

1393 dp = container_of(dp_display, struct dp_display_private, dp_display);

1394 dev = &dp->pdev->dev;

1395

1396 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,

1397 dp->link, &dp->dp_display.connector,

1398 minor);

1399 if (IS_ERR(dp->debug)) {

1400 rc = PTR_ERR(dp->debug);

1401 DRM_ERROR("failed to initialize debug, rc = %d\n", rc);

1402 dp->debug = NULL;

1403 }

1404 }

1405

1406 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,

1407 struct drm_encoder *encoder)

1408 {

1409 struct msm_drm_private *priv;

1410 int ret;

1411

1412 if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))

1413 return -EINVAL;

1414

1415 priv = dev->dev_private;

1416 dp_display->drm_dev = dev;

1417

1418 ret = dp_display_request_irq(dp_display);

1419 if (ret) {

1420 DRM_ERROR("request_irq failed, ret=%d\n", ret);

1421 return ret;

1422 }

1423

1424 dp_display->encoder = encoder;

1425

1426 dp_display->connector = dp_drm_connector_init(dp_display);

1427 if (IS_ERR(dp_display->connector)) {

1428 ret = PTR_ERR(dp_display->connector);

1429 DRM_DEV_ERROR(dev->dev,

1430 "failed to create dp connector: %d\n", ret);

1431 dp_display->connector = NULL;

1432 return ret;

1433 }

1434

1435 priv->connectors[priv->num_connectors++] = dp_display->connector;

1436 return 0;

1437 }

1438

1439 int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)

1440 {

1441 int rc = 0;

1442 struct dp_display_private *dp_display;

1443 u32 state;

1444

1445 dp_display = container_of(dp, struct dp_display_private, dp_display);

1446 if (!dp_display->dp_mode.drm_mode.clock) {

1447 DRM_ERROR("invalid params\n");

1448 return -EINVAL;

1449 }

1450

1451 mutex_lock(&dp_display->event_mutex);

1452

1453 /* stop sentinel checking */

1454 dp_del_event(dp_display, EV_CONNECT_PENDING_TIMEOUT);

1455

1456 rc = dp_display_set_mode(dp, &dp_display->dp_mode);

1457 if (rc) {

1458 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);

1459 mutex_unlock(&dp_display->event_mutex);

1460 return rc;

1461 }

1462

1463 rc = dp_display_prepare(dp);

1464 if (rc) {

1465 DRM_ERROR("DP display prepare failed, rc=%d\n", rc);

1466 mutex_unlock(&dp_display->event_mutex);

1467 return rc;

1468 }

1469

1470 state = dp_display->hpd_state;

1471

1472 if (state == ST_DISPLAY_OFF)

1473 dp_display_host_init(dp_display, true);

1474

1475 dp_display_enable(dp_display, 0);

1476

1477 rc = dp_display_post_enable(dp);

1478 if (rc) {

1479 DRM_ERROR("DP display post enable failed, rc=%d\n", rc);

1480 dp_display_disable(dp_display, 0);

1481 dp_display_unprepare(dp);

1482 }

1483

1484 /* manual kick off plug event to train link */

1485 if (state == ST_DISPLAY_OFF)

1486 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0);

1487

1488 /* completed connection */

1489 dp_display->hpd_state = ST_CONNECTED;

1490

1491 mutex_unlock(&dp_display->event_mutex);

1492

1493 return rc;

1494 }

1495

1496 int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder)

1497 {

1498 struct dp_display_private *dp_display;

1499

1500 dp_display = container_of(dp, struct dp_display_private, dp_display);

1501

1502 dp_ctrl_push_idle(dp_display->ctrl);

1503

1504 return 0;

1505 }

1506

1507 int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)

1508 {

1509 int rc = 0;

1510 u32 state;

1511 struct dp_display_private *dp_display;

1512

1513 dp_display = container_of(dp, struct dp_display_private, dp_display);

1514

1515 mutex_lock(&dp_display->event_mutex);

1516

1517 /* stop sentinel checking */

1518 dp_del_event(dp_display, EV_DISCONNECT_PENDING_TIMEOUT);

1519

1520 dp_display_disable(dp_display, 0);

1521

1522 rc = dp_display_unprepare(dp);

1523 if (rc)

1524 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc);

1525

1526 state = dp_display->hpd_state;

1527 if (state == ST_DISCONNECT_PENDING) {

1528 /* completed disconnection */

1529 dp_display->hpd_state = ST_DISCONNECTED;

1530 } else {

1531 dp_display->hpd_state = ST_DISPLAY_OFF;

1532 }

1533

1534 mutex_unlock(&dp_display->event_mutex);

1535 return rc;

1536 }

1537

1538 void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,

1539 struct drm_display_mode *mode,

1540 struct drm_display_mode *adjusted_mode)

1541 {

1542 struct dp_display_private *dp_display;

1543

1544 dp_display = container_of(dp, struct dp_display_private, dp_display);

1545

1546 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));

1547

1548 if (dp_display_check_video_test(dp))

1549 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);

1550 else /* Default num_components per pixel = 3 */

1551 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;

1552

1553 if (!dp_display->dp_mode.bpp)

1554 dp_display->dp_mode.bpp = 24; /* Default bpp */

1555

1556 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);

1557

1558 dp_display->dp_mode.v_active_low =

1559 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);

1560

1561 dp_display->dp_mode.h_active_low =

1562 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);

1563 }