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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd4 * Author: Chris Zhong <zyw@rock-chips.com>5 */6 7#include <linux/clk.h>8#include <linux/component.h>9#include <linux/extcon.h>10#include <linux/firmware.h>11#include <linux/mfd/syscon.h>12#include <linux/phy/phy.h>13#include <linux/regmap.h>14#include <linux/reset.h>15 16#include <sound/hdmi-codec.h>17 18#include <drm/display/drm_dp_helper.h>19#include <drm/drm_atomic_helper.h>20#include <drm/drm_edid.h>21#include <drm/drm_of.h>22#include <drm/drm_probe_helper.h>23#include <drm/drm_simple_kms_helper.h>24 25#include "cdn-dp-core.h"26#include "cdn-dp-reg.h"27 28static inline struct cdn_dp_device *connector_to_dp(struct drm_connector *connector)29{30 return container_of(connector, struct cdn_dp_device, connector);31}32 33static inline struct cdn_dp_device *encoder_to_dp(struct drm_encoder *encoder)34{35 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);36 37 return container_of(rkencoder, struct cdn_dp_device, encoder);38}39 40#define GRF_SOC_CON9 0x622441#define DP_SEL_VOP_LIT BIT(12)42#define GRF_SOC_CON26 0x626843#define DPTX_HPD_SEL (3 << 12)44#define DPTX_HPD_DEL (2 << 12)45#define DPTX_HPD_SEL_MASK (3 << 28)46 47#define CDN_FW_TIMEOUT_MS (64 * 1000)48#define CDN_DPCD_TIMEOUT_MS 500049#define CDN_DP_FIRMWARE "rockchip/dptx.bin"50MODULE_FIRMWARE(CDN_DP_FIRMWARE);51 52struct cdn_dp_data {53 u8 max_phy;54};55 56static struct cdn_dp_data rk3399_cdn_dp = {57 .max_phy = 2,58};59 60static const struct of_device_id cdn_dp_dt_ids[] = {61 { .compatible = "rockchip,rk3399-cdn-dp",62 .data = (void *)&rk3399_cdn_dp },63 {}64};65 66MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);67 68static int cdn_dp_grf_write(struct cdn_dp_device *dp,69 unsigned int reg, unsigned int val)70{71 int ret;72 73 ret = clk_prepare_enable(dp->grf_clk);74 if (ret) {75 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");76 return ret;77 }78 79 ret = regmap_write(dp->grf, reg, val);80 if (ret) {81 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);82 clk_disable_unprepare(dp->grf_clk);83 return ret;84 }85 86 clk_disable_unprepare(dp->grf_clk);87 88 return 0;89}90 91static int cdn_dp_clk_enable(struct cdn_dp_device *dp)92{93 int ret;94 unsigned long rate;95 96 ret = clk_prepare_enable(dp->pclk);97 if (ret < 0) {98 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);99 goto err_pclk;100 }101 102 ret = clk_prepare_enable(dp->core_clk);103 if (ret < 0) {104 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);105 goto err_core_clk;106 }107 108 ret = pm_runtime_get_sync(dp->dev);109 if (ret < 0) {110 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);111 goto err_pm_runtime_get;112 }113 114 reset_control_assert(dp->core_rst);115 reset_control_assert(dp->dptx_rst);116 reset_control_assert(dp->apb_rst);117 reset_control_deassert(dp->core_rst);118 reset_control_deassert(dp->dptx_rst);119 reset_control_deassert(dp->apb_rst);120 121 rate = clk_get_rate(dp->core_clk);122 if (!rate) {123 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");124 ret = -EINVAL;125 goto err_set_rate;126 }127 128 cdn_dp_set_fw_clk(dp, rate);129 cdn_dp_clock_reset(dp);130 131 return 0;132 133err_set_rate:134 pm_runtime_put(dp->dev);135err_pm_runtime_get:136 clk_disable_unprepare(dp->core_clk);137err_core_clk:138 clk_disable_unprepare(dp->pclk);139err_pclk:140 return ret;141}142 143static void cdn_dp_clk_disable(struct cdn_dp_device *dp)144{145 pm_runtime_put_sync(dp->dev);146 clk_disable_unprepare(dp->pclk);147 clk_disable_unprepare(dp->core_clk);148}149 150static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)151{152 struct extcon_dev *edev = port->extcon;153 union extcon_property_value property;154 int dptx;155 u8 lanes;156 157 dptx = extcon_get_state(edev, EXTCON_DISP_DP);158 if (dptx > 0) {159 extcon_get_property(edev, EXTCON_DISP_DP,160 EXTCON_PROP_USB_SS, &property);161 if (property.intval)162 lanes = 2;163 else164 lanes = 4;165 } else {166 lanes = 0;167 }168 169 return lanes;170}171 172static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)173{174 int ret;175 u8 value;176 177 *sink_count = 0;178 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);179 if (ret)180 return ret;181 182 *sink_count = DP_GET_SINK_COUNT(value);183 return 0;184}185 186static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)187{188 struct cdn_dp_port *port;189 int i, lanes;190 191 for (i = 0; i < dp->ports; i++) {192 port = dp->port[i];193 lanes = cdn_dp_get_port_lanes(port);194 if (lanes)195 return port;196 }197 return NULL;198}199 200static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)201{202 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);203 struct cdn_dp_port *port;204 u8 sink_count = 0;205 206 if (dp->active_port < 0 || dp->active_port >= dp->ports) {207 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");208 return false;209 }210 211 port = dp->port[dp->active_port];212 213 /*214 * Attempt to read sink count, retry in case the sink may not be ready.215 *216 * Sinks are *supposed* to come up within 1ms from an off state, but217 * some docks need more time to power up.218 */219 while (time_before(jiffies, timeout)) {220 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))221 return false;222 223 if (!cdn_dp_get_sink_count(dp, &sink_count))224 return sink_count ? true : false;225 226 usleep_range(5000, 10000);227 }228 229 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");230 return false;231}232 233static enum drm_connector_status234cdn_dp_connector_detect(struct drm_connector *connector, bool force)235{236 struct cdn_dp_device *dp = connector_to_dp(connector);237 enum drm_connector_status status = connector_status_disconnected;238 239 mutex_lock(&dp->lock);240 if (dp->connected)241 status = connector_status_connected;242 mutex_unlock(&dp->lock);243 244 return status;245}246 247static void cdn_dp_connector_destroy(struct drm_connector *connector)248{249 drm_connector_unregister(connector);250 drm_connector_cleanup(connector);251}252 253static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {254 .detect = cdn_dp_connector_detect,255 .destroy = cdn_dp_connector_destroy,256 .fill_modes = drm_helper_probe_single_connector_modes,257 .reset = drm_atomic_helper_connector_reset,258 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,259 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,260};261 262static int cdn_dp_connector_get_modes(struct drm_connector *connector)263{264 struct cdn_dp_device *dp = connector_to_dp(connector);265 int ret = 0;266 267 mutex_lock(&dp->lock);268 269 ret = drm_edid_connector_add_modes(connector);270 271 mutex_unlock(&dp->lock);272 273 return ret;274}275 276static enum drm_mode_status277cdn_dp_connector_mode_valid(struct drm_connector *connector,278 struct drm_display_mode *mode)279{280 struct cdn_dp_device *dp = connector_to_dp(connector);281 struct drm_display_info *display_info = &dp->connector.display_info;282 u32 requested, actual, rate, sink_max, source_max = 0;283 u8 lanes, bpc;284 285 /* If DP is disconnected, every mode is invalid */286 if (!dp->connected)287 return MODE_BAD;288 289 switch (display_info->bpc) {290 case 10:291 bpc = 10;292 break;293 case 6:294 bpc = 6;295 break;296 default:297 bpc = 8;298 break;299 }300 301 requested = mode->clock * bpc * 3 / 1000;302 303 source_max = dp->lanes;304 sink_max = drm_dp_max_lane_count(dp->dpcd);305 lanes = min(source_max, sink_max);306 307 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);308 sink_max = drm_dp_max_link_rate(dp->dpcd);309 rate = min(source_max, sink_max);310 311 actual = rate * lanes / 100;312 313 /* efficiency is about 0.8 */314 actual = actual * 8 / 10;315 316 if (requested > actual) {317 DRM_DEV_DEBUG_KMS(dp->dev,318 "requested=%d, actual=%d, clock=%d\n",319 requested, actual, mode->clock);320 return MODE_CLOCK_HIGH;321 }322 323 return MODE_OK;324}325 326static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {327 .get_modes = cdn_dp_connector_get_modes,328 .mode_valid = cdn_dp_connector_mode_valid,329};330 331static int cdn_dp_firmware_init(struct cdn_dp_device *dp)332{333 int ret;334 const u32 *iram_data, *dram_data;335 const struct firmware *fw = dp->fw;336 const struct cdn_firmware_header *hdr;337 338 hdr = (struct cdn_firmware_header *)fw->data;339 if (fw->size != le32_to_cpu(hdr->size_bytes)) {340 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");341 return -EINVAL;342 }343 344 iram_data = (const u32 *)(fw->data + hdr->header_size);345 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);346 347 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,348 dram_data, hdr->dram_size);349 if (ret)350 return ret;351 352 ret = cdn_dp_set_firmware_active(dp, true);353 if (ret) {354 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);355 return ret;356 }357 358 return cdn_dp_event_config(dp);359}360 361static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)362{363 const struct drm_display_info *info = &dp->connector.display_info;364 int ret;365 366 if (!cdn_dp_check_sink_connection(dp))367 return -ENODEV;368 369 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,370 DP_RECEIVER_CAP_SIZE);371 if (ret) {372 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);373 return ret;374 }375 376 drm_edid_free(dp->drm_edid);377 dp->drm_edid = drm_edid_read_custom(&dp->connector,378 cdn_dp_get_edid_block, dp);379 drm_edid_connector_update(&dp->connector, dp->drm_edid);380 381 dp->sink_has_audio = info->has_audio;382 383 if (dp->drm_edid)384 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",385 info->width_mm / 10, info->height_mm / 10);386 387 return 0;388}389 390static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)391{392 union extcon_property_value property;393 int ret;394 395 if (!port->phy_enabled) {396 ret = phy_power_on(port->phy);397 if (ret) {398 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",399 ret);400 goto err_phy;401 }402 port->phy_enabled = true;403 }404 405 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,406 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);407 if (ret) {408 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);409 goto err_power_on;410 }411 412 ret = cdn_dp_get_hpd_status(dp);413 if (ret <= 0) {414 if (!ret)415 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");416 goto err_power_on;417 }418 419 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,420 EXTCON_PROP_USB_TYPEC_POLARITY, &property);421 if (ret) {422 DRM_DEV_ERROR(dp->dev, "get property failed\n");423 goto err_power_on;424 }425 426 port->lanes = cdn_dp_get_port_lanes(port);427 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);428 if (ret) {429 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",430 ret);431 goto err_power_on;432 }433 434 dp->active_port = port->id;435 return 0;436 437err_power_on:438 if (phy_power_off(port->phy))439 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);440 else441 port->phy_enabled = false;442 443err_phy:444 cdn_dp_grf_write(dp, GRF_SOC_CON26,445 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);446 return ret;447}448 449static int cdn_dp_disable_phy(struct cdn_dp_device *dp,450 struct cdn_dp_port *port)451{452 int ret;453 454 if (port->phy_enabled) {455 ret = phy_power_off(port->phy);456 if (ret) {457 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);458 return ret;459 }460 }461 462 port->phy_enabled = false;463 port->lanes = 0;464 dp->active_port = -1;465 return 0;466}467 468static int cdn_dp_disable(struct cdn_dp_device *dp)469{470 int ret, i;471 472 if (!dp->active)473 return 0;474 475 for (i = 0; i < dp->ports; i++)476 cdn_dp_disable_phy(dp, dp->port[i]);477 478 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,479 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);480 if (ret) {481 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",482 ret);483 return ret;484 }485 486 cdn_dp_set_firmware_active(dp, false);487 cdn_dp_clk_disable(dp);488 dp->active = false;489 dp->max_lanes = 0;490 dp->max_rate = 0;491 if (!dp->connected) {492 drm_edid_free(dp->drm_edid);493 dp->drm_edid = NULL;494 }495 496 return 0;497}498 499static int cdn_dp_enable(struct cdn_dp_device *dp)500{501 int ret, i, lanes;502 struct cdn_dp_port *port;503 504 port = cdn_dp_connected_port(dp);505 if (!port) {506 DRM_DEV_ERROR(dp->dev,507 "Can't enable without connection\n");508 return -ENODEV;509 }510 511 if (dp->active)512 return 0;513 514 ret = cdn_dp_clk_enable(dp);515 if (ret)516 return ret;517 518 ret = cdn_dp_firmware_init(dp);519 if (ret) {520 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);521 goto err_clk_disable;522 }523 524 /* only enable the port that connected with downstream device */525 for (i = port->id; i < dp->ports; i++) {526 port = dp->port[i];527 lanes = cdn_dp_get_port_lanes(port);528 if (lanes) {529 ret = cdn_dp_enable_phy(dp, port);530 if (ret)531 continue;532 533 ret = cdn_dp_get_sink_capability(dp);534 if (ret) {535 cdn_dp_disable_phy(dp, port);536 } else {537 dp->active = true;538 dp->lanes = port->lanes;539 return 0;540 }541 }542 }543 544err_clk_disable:545 cdn_dp_clk_disable(dp);546 return ret;547}548 549static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,550 struct drm_display_mode *mode,551 struct drm_display_mode *adjusted)552{553 struct cdn_dp_device *dp = encoder_to_dp(encoder);554 struct drm_display_info *display_info = &dp->connector.display_info;555 struct video_info *video = &dp->video_info;556 557 switch (display_info->bpc) {558 case 10:559 video->color_depth = 10;560 break;561 case 6:562 video->color_depth = 6;563 break;564 default:565 video->color_depth = 8;566 break;567 }568 569 video->color_fmt = PXL_RGB;570 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);571 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);572 573 drm_mode_copy(&dp->mode, adjusted);574}575 576static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)577{578 u8 link_status[DP_LINK_STATUS_SIZE];579 struct cdn_dp_port *port = cdn_dp_connected_port(dp);580 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);581 582 if (!port || !dp->max_rate || !dp->max_lanes)583 return false;584 585 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,586 DP_LINK_STATUS_SIZE)) {587 DRM_ERROR("Failed to get link status\n");588 return false;589 }590 591 /* if link training is requested we should perform it always */592 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));593}594 595static void cdn_dp_audio_handle_plugged_change(struct cdn_dp_device *dp,596 bool plugged)597{598 if (dp->codec_dev)599 dp->plugged_cb(dp->codec_dev, plugged);600}601 602static void cdn_dp_encoder_enable(struct drm_encoder *encoder)603{604 struct cdn_dp_device *dp = encoder_to_dp(encoder);605 int ret, val;606 607 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);608 if (ret < 0) {609 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);610 return;611 }612 613 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",614 (ret) ? "LIT" : "BIG");615 if (ret)616 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);617 else618 val = DP_SEL_VOP_LIT << 16;619 620 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);621 if (ret)622 return;623 624 mutex_lock(&dp->lock);625 626 ret = cdn_dp_enable(dp);627 if (ret) {628 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",629 ret);630 goto out;631 }632 if (!cdn_dp_check_link_status(dp)) {633 ret = cdn_dp_train_link(dp);634 if (ret) {635 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);636 goto out;637 }638 }639 640 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);641 if (ret) {642 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);643 goto out;644 }645 646 ret = cdn_dp_config_video(dp);647 if (ret) {648 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);649 goto out;650 }651 652 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);653 if (ret) {654 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);655 goto out;656 }657 658 cdn_dp_audio_handle_plugged_change(dp, true);659 660out:661 mutex_unlock(&dp->lock);662}663 664static void cdn_dp_encoder_disable(struct drm_encoder *encoder)665{666 struct cdn_dp_device *dp = encoder_to_dp(encoder);667 int ret;668 669 mutex_lock(&dp->lock);670 cdn_dp_audio_handle_plugged_change(dp, false);671 672 if (dp->active) {673 ret = cdn_dp_disable(dp);674 if (ret) {675 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",676 ret);677 }678 }679 mutex_unlock(&dp->lock);680 681 /*682 * In the following 2 cases, we need to run the event_work to re-enable683 * the DP:684 * 1. If there is not just one port device is connected, and remove one685 * device from a port, the DP will be disabled here, at this case,686 * run the event_work to re-open DP for the other port.687 * 2. If re-training or re-config failed, the DP will be disabled here.688 * run the event_work to re-connect it.689 */690 if (!dp->connected && cdn_dp_connected_port(dp))691 schedule_work(&dp->event_work);692}693 694static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,695 struct drm_crtc_state *crtc_state,696 struct drm_connector_state *conn_state)697{698 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);699 700 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;701 s->output_type = DRM_MODE_CONNECTOR_DisplayPort;702 703 return 0;704}705 706static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {707 .mode_set = cdn_dp_encoder_mode_set,708 .enable = cdn_dp_encoder_enable,709 .disable = cdn_dp_encoder_disable,710 .atomic_check = cdn_dp_encoder_atomic_check,711};712 713static int cdn_dp_parse_dt(struct cdn_dp_device *dp)714{715 struct device *dev = dp->dev;716 struct device_node *np = dev->of_node;717 struct platform_device *pdev = to_platform_device(dev);718 719 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");720 if (IS_ERR(dp->grf)) {721 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");722 return PTR_ERR(dp->grf);723 }724 725 dp->regs = devm_platform_ioremap_resource(pdev, 0);726 if (IS_ERR(dp->regs)) {727 DRM_DEV_ERROR(dev, "ioremap reg failed\n");728 return PTR_ERR(dp->regs);729 }730 731 dp->core_clk = devm_clk_get(dev, "core-clk");732 if (IS_ERR(dp->core_clk)) {733 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");734 return PTR_ERR(dp->core_clk);735 }736 737 dp->pclk = devm_clk_get(dev, "pclk");738 if (IS_ERR(dp->pclk)) {739 DRM_DEV_ERROR(dev, "cannot get pclk\n");740 return PTR_ERR(dp->pclk);741 }742 743 dp->spdif_clk = devm_clk_get(dev, "spdif");744 if (IS_ERR(dp->spdif_clk)) {745 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");746 return PTR_ERR(dp->spdif_clk);747 }748 749 dp->grf_clk = devm_clk_get(dev, "grf");750 if (IS_ERR(dp->grf_clk)) {751 DRM_DEV_ERROR(dev, "cannot get grf clk\n");752 return PTR_ERR(dp->grf_clk);753 }754 755 dp->spdif_rst = devm_reset_control_get(dev, "spdif");756 if (IS_ERR(dp->spdif_rst)) {757 DRM_DEV_ERROR(dev, "no spdif reset control found\n");758 return PTR_ERR(dp->spdif_rst);759 }760 761 dp->dptx_rst = devm_reset_control_get(dev, "dptx");762 if (IS_ERR(dp->dptx_rst)) {763 DRM_DEV_ERROR(dev, "no uphy reset control found\n");764 return PTR_ERR(dp->dptx_rst);765 }766 767 dp->core_rst = devm_reset_control_get(dev, "core");768 if (IS_ERR(dp->core_rst)) {769 DRM_DEV_ERROR(dev, "no core reset control found\n");770 return PTR_ERR(dp->core_rst);771 }772 773 dp->apb_rst = devm_reset_control_get(dev, "apb");774 if (IS_ERR(dp->apb_rst)) {775 DRM_DEV_ERROR(dev, "no apb reset control found\n");776 return PTR_ERR(dp->apb_rst);777 }778 779 return 0;780}781 782static int cdn_dp_audio_hw_params(struct device *dev, void *data,783 struct hdmi_codec_daifmt *daifmt,784 struct hdmi_codec_params *params)785{786 struct cdn_dp_device *dp = dev_get_drvdata(dev);787 struct audio_info audio = {788 .sample_width = params->sample_width,789 .sample_rate = params->sample_rate,790 .channels = params->channels,791 };792 int ret;793 794 mutex_lock(&dp->lock);795 if (!dp->active) {796 ret = -ENODEV;797 goto out;798 }799 800 switch (daifmt->fmt) {801 case HDMI_I2S:802 audio.format = AFMT_I2S;803 break;804 case HDMI_SPDIF:805 audio.format = AFMT_SPDIF;806 break;807 default:808 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);809 ret = -EINVAL;810 goto out;811 }812 813 ret = cdn_dp_audio_config(dp, &audio);814 if (!ret)815 dp->audio_info = audio;816 817out:818 mutex_unlock(&dp->lock);819 return ret;820}821 822static void cdn_dp_audio_shutdown(struct device *dev, void *data)823{824 struct cdn_dp_device *dp = dev_get_drvdata(dev);825 int ret;826 827 mutex_lock(&dp->lock);828 if (!dp->active)829 goto out;830 831 ret = cdn_dp_audio_stop(dp, &dp->audio_info);832 if (!ret)833 dp->audio_info.format = AFMT_UNUSED;834out:835 mutex_unlock(&dp->lock);836}837 838static int cdn_dp_audio_mute_stream(struct device *dev, void *data,839 bool enable, int direction)840{841 struct cdn_dp_device *dp = dev_get_drvdata(dev);842 int ret;843 844 mutex_lock(&dp->lock);845 if (!dp->active) {846 ret = -ENODEV;847 goto out;848 }849 850 ret = cdn_dp_audio_mute(dp, enable);851 852out:853 mutex_unlock(&dp->lock);854 return ret;855}856 857static int cdn_dp_audio_get_eld(struct device *dev, void *data,858 u8 *buf, size_t len)859{860 struct cdn_dp_device *dp = dev_get_drvdata(dev);861 862 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));863 864 return 0;865}866 867static int cdn_dp_audio_hook_plugged_cb(struct device *dev, void *data,868 hdmi_codec_plugged_cb fn,869 struct device *codec_dev)870{871 struct cdn_dp_device *dp = dev_get_drvdata(dev);872 873 mutex_lock(&dp->lock);874 dp->plugged_cb = fn;875 dp->codec_dev = codec_dev;876 cdn_dp_audio_handle_plugged_change(dp, dp->connected);877 mutex_unlock(&dp->lock);878 879 return 0;880}881 882static const struct hdmi_codec_ops audio_codec_ops = {883 .hw_params = cdn_dp_audio_hw_params,884 .audio_shutdown = cdn_dp_audio_shutdown,885 .mute_stream = cdn_dp_audio_mute_stream,886 .get_eld = cdn_dp_audio_get_eld,887 .hook_plugged_cb = cdn_dp_audio_hook_plugged_cb,888 .no_capture_mute = 1,889};890 891static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,892 struct device *dev)893{894 struct hdmi_codec_pdata codec_data = {895 .i2s = 1,896 .spdif = 1,897 .ops = &audio_codec_ops,898 .max_i2s_channels = 8,899 };900 901 dp->audio_pdev = platform_device_register_data(902 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,903 &codec_data, sizeof(codec_data));904 905 return PTR_ERR_OR_ZERO(dp->audio_pdev);906}907 908static int cdn_dp_request_firmware(struct cdn_dp_device *dp)909{910 int ret;911 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);912 unsigned long sleep = 1000;913 914 WARN_ON(!mutex_is_locked(&dp->lock));915 916 if (dp->fw_loaded)917 return 0;918 919 /* Drop the lock before getting the firmware to avoid blocking boot */920 mutex_unlock(&dp->lock);921 922 while (time_before(jiffies, timeout)) {923 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);924 if (ret == -ENOENT) {925 msleep(sleep);926 sleep *= 2;927 continue;928 } else if (ret) {929 DRM_DEV_ERROR(dp->dev,930 "failed to request firmware: %d\n", ret);931 goto out;932 }933 934 dp->fw_loaded = true;935 ret = 0;936 goto out;937 }938 939 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");940 ret = -ETIMEDOUT;941out:942 mutex_lock(&dp->lock);943 return ret;944}945 946static void cdn_dp_pd_event_work(struct work_struct *work)947{948 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,949 event_work);950 struct drm_connector *connector = &dp->connector;951 enum drm_connector_status old_status;952 953 int ret;954 955 mutex_lock(&dp->lock);956 957 if (dp->suspended)958 goto out;959 960 ret = cdn_dp_request_firmware(dp);961 if (ret)962 goto out;963 964 dp->connected = true;965 966 /* Not connected, notify userspace to disable the block */967 if (!cdn_dp_connected_port(dp)) {968 DRM_DEV_INFO(dp->dev, "Not connected; disabling cdn\n");969 dp->connected = false;970 971 /* Connected but not enabled, enable the block */972 } else if (!dp->active) {973 DRM_DEV_INFO(dp->dev, "Connected, not enabled; enabling cdn\n");974 ret = cdn_dp_enable(dp);975 if (ret) {976 DRM_DEV_ERROR(dp->dev, "Enabling dp failed: %d\n", ret);977 dp->connected = false;978 }979 980 /* Enabled and connected to a dongle without a sink, notify userspace */981 } else if (!cdn_dp_check_sink_connection(dp)) {982 DRM_DEV_INFO(dp->dev, "Connected without sink; assert hpd\n");983 dp->connected = false;984 985 /* Enabled and connected with a sink, re-train if requested */986 } else if (!cdn_dp_check_link_status(dp)) {987 unsigned int rate = dp->max_rate;988 unsigned int lanes = dp->max_lanes;989 struct drm_display_mode *mode = &dp->mode;990 991 DRM_DEV_INFO(dp->dev, "Connected with sink; re-train link\n");992 ret = cdn_dp_train_link(dp);993 if (ret) {994 dp->connected = false;995 DRM_DEV_ERROR(dp->dev, "Training link failed: %d\n", ret);996 goto out;997 }998 999 /* If training result is changed, update the video config */1000 if (mode->clock &&1001 (rate != dp->max_rate || lanes != dp->max_lanes)) {1002 ret = cdn_dp_config_video(dp);1003 if (ret) {1004 dp->connected = false;1005 DRM_DEV_ERROR(dp->dev, "Failed to configure video: %d\n", ret);1006 }1007 }1008 }1009 1010out:1011 mutex_unlock(&dp->lock);1012 1013 old_status = connector->status;1014 connector->status = connector->funcs->detect(connector, false);1015 if (old_status != connector->status)1016 drm_kms_helper_hotplug_event(dp->drm_dev);1017}1018 1019static int cdn_dp_pd_event(struct notifier_block *nb,1020 unsigned long event, void *priv)1021{1022 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,1023 event_nb);1024 struct cdn_dp_device *dp = port->dp;1025 1026 /*1027 * It would be nice to be able to just do the work inline right here.1028 * However, we need to make a bunch of calls that might sleep in order1029 * to turn on the block/phy, so use a worker instead.1030 */1031 schedule_work(&dp->event_work);1032 1033 return NOTIFY_DONE;1034}1035 1036static int cdn_dp_bind(struct device *dev, struct device *master, void *data)1037{1038 struct cdn_dp_device *dp = dev_get_drvdata(dev);1039 struct drm_encoder *encoder;1040 struct drm_connector *connector;1041 struct cdn_dp_port *port;1042 struct drm_device *drm_dev = data;1043 int ret, i;1044 1045 ret = cdn_dp_parse_dt(dp);1046 if (ret < 0)1047 return ret;1048 1049 dp->drm_dev = drm_dev;1050 dp->connected = false;1051 dp->active = false;1052 dp->active_port = -1;1053 dp->fw_loaded = false;1054 1055 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);1056 1057 encoder = &dp->encoder.encoder;1058 1059 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,1060 dev->of_node);1061 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);1062 1063 ret = drm_simple_encoder_init(drm_dev, encoder,1064 DRM_MODE_ENCODER_TMDS);1065 if (ret) {1066 DRM_ERROR("failed to initialize encoder with drm\n");1067 return ret;1068 }1069 1070 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);1071 1072 connector = &dp->connector;1073 connector->polled = DRM_CONNECTOR_POLL_HPD;1074 connector->dpms = DRM_MODE_DPMS_OFF;1075 1076 ret = drm_connector_init(drm_dev, connector,1077 &cdn_dp_atomic_connector_funcs,1078 DRM_MODE_CONNECTOR_DisplayPort);1079 if (ret) {1080 DRM_ERROR("failed to initialize connector with drm\n");1081 goto err_free_encoder;1082 }1083 1084 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);1085 1086 ret = drm_connector_attach_encoder(connector, encoder);1087 if (ret) {1088 DRM_ERROR("failed to attach connector and encoder\n");1089 goto err_free_connector;1090 }1091 1092 for (i = 0; i < dp->ports; i++) {1093 port = dp->port[i];1094 1095 port->event_nb.notifier_call = cdn_dp_pd_event;1096 ret = devm_extcon_register_notifier(dp->dev, port->extcon,1097 EXTCON_DISP_DP,1098 &port->event_nb);1099 if (ret) {1100 DRM_DEV_ERROR(dev,1101 "register EXTCON_DISP_DP notifier err\n");1102 goto err_free_connector;1103 }1104 }1105 1106 pm_runtime_enable(dev);1107 1108 schedule_work(&dp->event_work);1109 1110 return 0;1111 1112err_free_connector:1113 drm_connector_cleanup(connector);1114err_free_encoder:1115 drm_encoder_cleanup(encoder);1116 return ret;1117}1118 1119static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)1120{1121 struct cdn_dp_device *dp = dev_get_drvdata(dev);1122 struct drm_encoder *encoder = &dp->encoder.encoder;1123 struct drm_connector *connector = &dp->connector;1124 1125 cancel_work_sync(&dp->event_work);1126 cdn_dp_encoder_disable(encoder);1127 encoder->funcs->destroy(encoder);1128 connector->funcs->destroy(connector);1129 1130 pm_runtime_disable(dev);1131 if (dp->fw_loaded)1132 release_firmware(dp->fw);1133 drm_edid_free(dp->drm_edid);1134 dp->drm_edid = NULL;1135}1136 1137static const struct component_ops cdn_dp_component_ops = {1138 .bind = cdn_dp_bind,1139 .unbind = cdn_dp_unbind,1140};1141 1142static int cdn_dp_suspend(struct device *dev)1143{1144 struct cdn_dp_device *dp = dev_get_drvdata(dev);1145 int ret = 0;1146 1147 mutex_lock(&dp->lock);1148 if (dp->active)1149 ret = cdn_dp_disable(dp);1150 dp->suspended = true;1151 mutex_unlock(&dp->lock);1152 1153 return ret;1154}1155 1156static __maybe_unused int cdn_dp_resume(struct device *dev)1157{1158 struct cdn_dp_device *dp = dev_get_drvdata(dev);1159 1160 mutex_lock(&dp->lock);1161 dp->suspended = false;1162 if (dp->fw_loaded)1163 schedule_work(&dp->event_work);1164 mutex_unlock(&dp->lock);1165 1166 return 0;1167}1168 1169static int cdn_dp_probe(struct platform_device *pdev)1170{1171 struct device *dev = &pdev->dev;1172 const struct of_device_id *match;1173 struct cdn_dp_data *dp_data;1174 struct cdn_dp_port *port;1175 struct cdn_dp_device *dp;1176 struct extcon_dev *extcon;1177 struct phy *phy;1178 int ret;1179 int i;1180 1181 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);1182 if (!dp)1183 return -ENOMEM;1184 dp->dev = dev;1185 1186 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);1187 dp_data = (struct cdn_dp_data *)match->data;1188 1189 for (i = 0; i < dp_data->max_phy; i++) {1190 extcon = extcon_get_edev_by_phandle(dev, i);1191 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);1192 1193 if (PTR_ERR(extcon) == -EPROBE_DEFER ||1194 PTR_ERR(phy) == -EPROBE_DEFER)1195 return -EPROBE_DEFER;1196 1197 if (IS_ERR(extcon) || IS_ERR(phy))1198 continue;1199 1200 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);1201 if (!port)1202 return -ENOMEM;1203 1204 port->extcon = extcon;1205 port->phy = phy;1206 port->dp = dp;1207 port->id = i;1208 dp->port[dp->ports++] = port;1209 }1210 1211 if (!dp->ports) {1212 DRM_DEV_ERROR(dev, "missing extcon or phy\n");1213 return -EINVAL;1214 }1215 1216 mutex_init(&dp->lock);1217 dev_set_drvdata(dev, dp);1218 1219 ret = cdn_dp_audio_codec_init(dp, dev);1220 if (ret)1221 return ret;1222 1223 ret = component_add(dev, &cdn_dp_component_ops);1224 if (ret)1225 goto err_audio_deinit;1226 1227 return 0;1228 1229err_audio_deinit:1230 platform_device_unregister(dp->audio_pdev);1231 return ret;1232}1233 1234static void cdn_dp_remove(struct platform_device *pdev)1235{1236 struct cdn_dp_device *dp = platform_get_drvdata(pdev);1237 1238 platform_device_unregister(dp->audio_pdev);1239 cdn_dp_suspend(dp->dev);1240 component_del(&pdev->dev, &cdn_dp_component_ops);1241}1242 1243static void cdn_dp_shutdown(struct platform_device *pdev)1244{1245 struct cdn_dp_device *dp = platform_get_drvdata(pdev);1246 1247 cdn_dp_suspend(dp->dev);1248}1249 1250static const struct dev_pm_ops cdn_dp_pm_ops = {1251 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,1252 cdn_dp_resume)1253};1254 1255struct platform_driver cdn_dp_driver = {1256 .probe = cdn_dp_probe,1257 .remove_new = cdn_dp_remove,1258 .shutdown = cdn_dp_shutdown,1259 .driver = {1260 .name = "cdn-dp",1261 .of_match_table = cdn_dp_dt_ids,1262 .pm = &cdn_dp_pm_ops,1263 },1264};1265