2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
3 * Author: Chris Zhong <zyw@rock-chips.com>
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
16 #include <drm/drm_atomic_helper.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_dp_helper.h>
19 #include <drm/drm_edid.h>
20 #include <drm/drm_of.h>
22 #include <linux/clk.h>
23 #include <linux/component.h>
24 #include <linux/extcon.h>
25 #include <linux/firmware.h>
26 #include <linux/regmap.h>
27 #include <linux/reset.h>
28 #include <linux/mfd/syscon.h>
29 #include <linux/phy/phy.h>
31 #include <sound/hdmi-codec.h>
33 #include "cdn-dp-core.h"
34 #include "cdn-dp-reg.h"
35 #include "rockchip_drm_vop.h"
37 #define connector_to_dp(c) \
38 container_of(c, struct cdn_dp_device, connector)
40 #define encoder_to_dp(c) \
41 container_of(c, struct cdn_dp_device, encoder)
43 #define GRF_SOC_CON9 0x6224
44 #define DP_SEL_VOP_LIT BIT(12)
45 #define GRF_SOC_CON26 0x6268
46 #define UPHY_SEL_BIT 3
47 #define UPHY_SEL_MASK BIT(19)
48 #define DPTX_HPD_SEL (3 << 12)
49 #define DPTX_HPD_DEL (2 << 12)
50 #define DPTX_HPD_SEL_MASK (3 << 28)
52 #define CDN_FW_TIMEOUT_MS (64 * 1000)
53 #define CDN_DPCD_TIMEOUT_MS 5000
54 #define CDN_DP_FIRMWARE "rockchip/dptx.bin"
60 struct cdn_dp_data rk3399_cdn_dp = {
64 static const struct of_device_id cdn_dp_dt_ids[] = {
65 { .compatible = "rockchip,rk3399-cdn-dp",
66 .data = (void *)&rk3399_cdn_dp },
70 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
72 static int cdn_dp_grf_write(struct cdn_dp_device *dp,
73 unsigned int reg, unsigned int val)
77 ret = clk_prepare_enable(dp->grf_clk);
79 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
83 ret = regmap_write(dp->grf, reg, val);
85 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
89 clk_disable_unprepare(dp->grf_clk);
94 static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
99 ret = clk_prepare_enable(dp->pclk);
101 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
105 ret = clk_prepare_enable(dp->core_clk);
107 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
111 ret = pm_runtime_get_sync(dp->dev);
113 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
114 goto err_pm_runtime_get;
117 reset_control_assert(dp->core_rst);
118 reset_control_assert(dp->dptx_rst);
119 reset_control_assert(dp->apb_rst);
120 reset_control_deassert(dp->core_rst);
121 reset_control_deassert(dp->dptx_rst);
122 reset_control_deassert(dp->apb_rst);
124 rate = clk_get_rate(dp->core_clk);
126 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
131 cdn_dp_set_fw_clk(dp, rate);
132 cdn_dp_clock_reset(dp);
137 pm_runtime_put(dp->dev);
139 clk_disable_unprepare(dp->core_clk);
141 clk_disable_unprepare(dp->pclk);
146 static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
148 pm_runtime_put_sync(dp->dev);
149 clk_disable_unprepare(dp->pclk);
150 clk_disable_unprepare(dp->core_clk);
153 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
155 struct extcon_dev *edev = port->extcon;
156 union extcon_property_value property;
160 dptx = extcon_get_state(edev, EXTCON_DISP_DP);
162 extcon_get_property(edev, EXTCON_DISP_DP,
163 EXTCON_PROP_USB_SS, &property);
175 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
181 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
185 *sink_count = DP_GET_SINK_COUNT(value);
189 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
191 struct cdn_dp_port *port;
194 for (i = 0; i < dp->ports; i++) {
196 lanes = cdn_dp_get_port_lanes(port);
203 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
205 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
206 struct cdn_dp_port *port;
209 if (dp->active_port < 0 || dp->active_port >= dp->ports) {
210 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
214 port = dp->port[dp->active_port];
217 * Attempt to read sink count, retry in case the sink may not be ready.
219 * Sinks are *supposed* to come up within 1ms from an off state, but
220 * some docks need more time to power up.
222 while (time_before(jiffies, timeout)) {
223 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
226 if (!cdn_dp_get_sink_count(dp, &sink_count))
227 return sink_count ? true : false;
229 usleep_range(5000, 10000);
232 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
236 static enum drm_connector_status
237 cdn_dp_connector_detect(struct drm_connector *connector, bool force)
239 struct cdn_dp_device *dp = connector_to_dp(connector);
240 enum drm_connector_status status = connector_status_disconnected;
242 mutex_lock(&dp->lock);
244 status = connector_status_connected;
245 mutex_unlock(&dp->lock);
250 static void cdn_dp_connector_destroy(struct drm_connector *connector)
252 drm_connector_unregister(connector);
253 drm_connector_cleanup(connector);
256 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
257 .dpms = drm_atomic_helper_connector_dpms,
258 .detect = cdn_dp_connector_detect,
259 .destroy = cdn_dp_connector_destroy,
260 .fill_modes = drm_helper_probe_single_connector_modes,
261 .reset = drm_atomic_helper_connector_reset,
262 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
263 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
266 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
268 struct cdn_dp_device *dp = connector_to_dp(connector);
272 mutex_lock(&dp->lock);
275 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
276 edid->width_cm, edid->height_cm);
278 dp->sink_has_audio = drm_detect_monitor_audio(edid);
279 ret = drm_add_edid_modes(connector, edid);
281 drm_mode_connector_update_edid_property(connector,
283 drm_edid_to_eld(connector, edid);
286 mutex_unlock(&dp->lock);
291 static struct drm_encoder *
292 cdn_dp_connector_best_encoder(struct drm_connector *connector)
294 struct cdn_dp_device *dp = connector_to_dp(connector);
299 static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
300 struct drm_display_mode *mode)
302 struct cdn_dp_device *dp = connector_to_dp(connector);
303 struct drm_display_info *display_info = &dp->connector.display_info;
304 u32 requested, actual, rate, sink_max, source_max = 0;
307 /* If DP is disconnected, every mode is invalid */
311 switch (display_info->bpc) {
323 requested = mode->clock * bpc * 3 / 1000;
325 source_max = dp->lanes;
326 sink_max = drm_dp_max_lane_count(dp->dpcd);
327 lanes = min(source_max, sink_max);
329 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
330 sink_max = drm_dp_max_link_rate(dp->dpcd);
331 rate = min(source_max, sink_max);
333 actual = rate * lanes / 100;
335 /* efficiency is about 0.8 */
336 actual = actual * 8 / 10;
338 if (requested > actual) {
339 DRM_DEV_DEBUG_KMS(dp->dev,
340 "requested=%d, actual=%d, clock=%d\n",
341 requested, actual, mode->clock);
342 return MODE_CLOCK_HIGH;
348 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
349 .get_modes = cdn_dp_connector_get_modes,
350 .best_encoder = cdn_dp_connector_best_encoder,
351 .mode_valid = cdn_dp_connector_mode_valid,
354 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
357 const u32 *iram_data, *dram_data;
358 const struct firmware *fw = dp->fw;
359 const struct cdn_firmware_header *hdr;
361 hdr = (struct cdn_firmware_header *)fw->data;
362 if (fw->size != le32_to_cpu(hdr->size_bytes)) {
363 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
367 iram_data = (const u32 *)(fw->data + hdr->header_size);
368 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
370 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
371 dram_data, hdr->dram_size);
375 ret = cdn_dp_set_firmware_active(dp, true);
377 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
381 return cdn_dp_event_config(dp);
384 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
388 if (!cdn_dp_check_sink_connection(dp))
391 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
392 DP_RECEIVER_CAP_SIZE);
394 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
399 dp->edid = drm_do_get_edid(&dp->connector,
400 cdn_dp_get_edid_block, dp);
404 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
406 union extcon_property_value property;
409 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
410 (port->id << UPHY_SEL_BIT) | UPHY_SEL_MASK);
414 if (!port->phy_enabled) {
415 ret = phy_power_on(port->phy);
417 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
421 port->phy_enabled = true;
424 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
425 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
427 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
431 ret = cdn_dp_get_hpd_status(dp);
434 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
438 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
439 EXTCON_PROP_USB_TYPEC_POLARITY, &property);
441 DRM_DEV_ERROR(dp->dev, "get property failed\n");
445 port->lanes = cdn_dp_get_port_lanes(port);
446 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
448 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
453 dp->active_port = port->id;
457 if (phy_power_off(port->phy))
458 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
460 port->phy_enabled = false;
463 cdn_dp_grf_write(dp, GRF_SOC_CON26,
464 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
468 static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
469 struct cdn_dp_port *port)
473 if (port->phy_enabled) {
474 ret = phy_power_off(port->phy);
476 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
481 port->phy_enabled = false;
483 dp->active_port = -1;
487 static int cdn_dp_disable(struct cdn_dp_device *dp)
494 for (i = 0; i < dp->ports; i++)
495 cdn_dp_disable_phy(dp, dp->port[i]);
497 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
498 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
500 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
505 cdn_dp_set_firmware_active(dp, false);
506 cdn_dp_clk_disable(dp);
509 dp->link.num_lanes = 0;
510 if (!dp->connected) {
518 static int cdn_dp_enable(struct cdn_dp_device *dp)
521 struct cdn_dp_port *port;
523 port = cdn_dp_connected_port(dp);
525 DRM_DEV_ERROR(dp->dev,
526 "Can't enable without connection\n");
533 ret = cdn_dp_clk_enable(dp);
537 ret = cdn_dp_firmware_init(dp);
539 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
540 goto err_clk_disable;
543 /* only enable the port that connected with downstream device */
544 for (i = port->id; i < dp->ports; i++) {
546 lanes = cdn_dp_get_port_lanes(port);
548 ret = cdn_dp_enable_phy(dp, port);
552 ret = cdn_dp_get_sink_capability(dp);
554 cdn_dp_disable_phy(dp, port);
557 dp->lanes = port->lanes;
564 cdn_dp_clk_disable(dp);
568 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
569 struct drm_display_mode *mode,
570 struct drm_display_mode *adjusted)
572 struct cdn_dp_device *dp = encoder_to_dp(encoder);
573 struct drm_display_info *display_info = &dp->connector.display_info;
574 struct video_info *video = &dp->video_info;
576 switch (display_info->bpc) {
578 video->color_depth = 10;
581 video->color_depth = 6;
584 video->color_depth = 8;
588 video->color_fmt = PXL_RGB;
589 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
590 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
592 memcpy(&dp->mode, adjusted, sizeof(*mode));
595 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
597 u8 link_status[DP_LINK_STATUS_SIZE];
598 struct cdn_dp_port *port = cdn_dp_connected_port(dp);
599 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
601 if (!port || !dp->link.rate || !dp->link.num_lanes)
604 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
605 DP_LINK_STATUS_SIZE)) {
606 DRM_ERROR("Failed to get link status\n");
610 /* if link training is requested we should perform it always */
611 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
614 static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
616 struct cdn_dp_device *dp = encoder_to_dp(encoder);
619 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
621 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
625 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
626 (ret) ? "LIT" : "BIG");
628 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
630 val = DP_SEL_VOP_LIT << 16;
632 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
636 mutex_lock(&dp->lock);
638 ret = cdn_dp_enable(dp);
640 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
644 if (!cdn_dp_check_link_status(dp)) {
645 ret = cdn_dp_train_link(dp);
647 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
652 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
654 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
658 ret = cdn_dp_config_video(dp);
660 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
664 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
666 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
670 mutex_unlock(&dp->lock);
673 static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
675 struct cdn_dp_device *dp = encoder_to_dp(encoder);
678 mutex_lock(&dp->lock);
680 ret = cdn_dp_disable(dp);
682 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
686 mutex_unlock(&dp->lock);
689 * In the following 2 cases, we need to run the event_work to re-enable
691 * 1. If there is not just one port device is connected, and remove one
692 * device from a port, the DP will be disabled here, at this case,
693 * run the event_work to re-open DP for the other port.
694 * 2. If re-training or re-config failed, the DP will be disabled here.
695 * run the event_work to re-connect it.
697 if (!dp->connected && cdn_dp_connected_port(dp))
698 schedule_work(&dp->event_work);
701 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
702 struct drm_crtc_state *crtc_state,
703 struct drm_connector_state *conn_state)
705 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
707 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
708 s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
713 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
714 .mode_set = cdn_dp_encoder_mode_set,
715 .enable = cdn_dp_encoder_enable,
716 .disable = cdn_dp_encoder_disable,
717 .atomic_check = cdn_dp_encoder_atomic_check,
720 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
721 .destroy = drm_encoder_cleanup,
724 static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
726 struct device *dev = dp->dev;
727 struct device_node *np = dev->of_node;
728 struct platform_device *pdev = to_platform_device(dev);
729 struct resource *res;
731 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
732 if (IS_ERR(dp->grf)) {
733 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
734 return PTR_ERR(dp->grf);
737 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
738 dp->regs = devm_ioremap_resource(dev, res);
739 if (IS_ERR(dp->regs)) {
740 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
741 return PTR_ERR(dp->regs);
744 dp->core_clk = devm_clk_get(dev, "core-clk");
745 if (IS_ERR(dp->core_clk)) {
746 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
747 return PTR_ERR(dp->core_clk);
750 dp->pclk = devm_clk_get(dev, "pclk");
751 if (IS_ERR(dp->pclk)) {
752 DRM_DEV_ERROR(dev, "cannot get pclk\n");
753 return PTR_ERR(dp->pclk);
756 dp->spdif_clk = devm_clk_get(dev, "spdif");
757 if (IS_ERR(dp->spdif_clk)) {
758 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
759 return PTR_ERR(dp->spdif_clk);
762 dp->grf_clk = devm_clk_get(dev, "grf");
763 if (IS_ERR(dp->grf_clk)) {
764 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
765 return PTR_ERR(dp->grf_clk);
768 dp->spdif_rst = devm_reset_control_get(dev, "spdif");
769 if (IS_ERR(dp->spdif_rst)) {
770 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
771 return PTR_ERR(dp->spdif_rst);
774 dp->dptx_rst = devm_reset_control_get(dev, "dptx");
775 if (IS_ERR(dp->dptx_rst)) {
776 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
777 return PTR_ERR(dp->dptx_rst);
780 dp->core_rst = devm_reset_control_get(dev, "core");
781 if (IS_ERR(dp->core_rst)) {
782 DRM_DEV_ERROR(dev, "no core reset control found\n");
783 return PTR_ERR(dp->core_rst);
786 dp->apb_rst = devm_reset_control_get(dev, "apb");
787 if (IS_ERR(dp->apb_rst)) {
788 DRM_DEV_ERROR(dev, "no apb reset control found\n");
789 return PTR_ERR(dp->apb_rst);
795 static int cdn_dp_audio_hw_params(struct device *dev, void *data,
796 struct hdmi_codec_daifmt *daifmt,
797 struct hdmi_codec_params *params)
799 struct cdn_dp_device *dp = dev_get_drvdata(dev);
800 struct audio_info audio = {
801 .sample_width = params->sample_width,
802 .sample_rate = params->sample_rate,
803 .channels = params->channels,
807 mutex_lock(&dp->lock);
813 switch (daifmt->fmt) {
815 audio.format = AFMT_I2S;
818 audio.format = AFMT_SPDIF;
821 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
826 ret = cdn_dp_audio_config(dp, &audio);
828 dp->audio_info = audio;
831 mutex_unlock(&dp->lock);
835 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
837 struct cdn_dp_device *dp = dev_get_drvdata(dev);
840 mutex_lock(&dp->lock);
844 ret = cdn_dp_audio_stop(dp, &dp->audio_info);
846 dp->audio_info.format = AFMT_UNUSED;
848 mutex_unlock(&dp->lock);
851 static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
854 struct cdn_dp_device *dp = dev_get_drvdata(dev);
857 mutex_lock(&dp->lock);
863 ret = cdn_dp_audio_mute(dp, enable);
866 mutex_unlock(&dp->lock);
870 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
873 struct cdn_dp_device *dp = dev_get_drvdata(dev);
875 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
880 static const struct hdmi_codec_ops audio_codec_ops = {
881 .hw_params = cdn_dp_audio_hw_params,
882 .audio_shutdown = cdn_dp_audio_shutdown,
883 .digital_mute = cdn_dp_audio_digital_mute,
884 .get_eld = cdn_dp_audio_get_eld,
887 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
890 struct hdmi_codec_pdata codec_data = {
893 .ops = &audio_codec_ops,
894 .max_i2s_channels = 8,
897 dp->audio_pdev = platform_device_register_data(
898 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
899 &codec_data, sizeof(codec_data));
901 return PTR_ERR_OR_ZERO(dp->audio_pdev);
904 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
907 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
908 unsigned long sleep = 1000;
910 WARN_ON(!mutex_is_locked(&dp->lock));
915 /* Drop the lock before getting the firmware to avoid blocking boot */
916 mutex_unlock(&dp->lock);
918 while (time_before(jiffies, timeout)) {
919 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
920 if (ret == -ENOENT) {
925 DRM_DEV_ERROR(dp->dev,
926 "failed to request firmware: %d\n", ret);
930 dp->fw_loaded = true;
935 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
938 mutex_lock(&dp->lock);
942 static void cdn_dp_pd_event_work(struct work_struct *work)
944 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
946 struct drm_connector *connector = &dp->connector;
947 enum drm_connector_status old_status;
951 mutex_lock(&dp->lock);
956 ret = cdn_dp_request_firmware(dp);
960 dp->connected = true;
962 /* Not connected, notify userspace to disable the block */
963 if (!cdn_dp_connected_port(dp)) {
964 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
965 dp->connected = false;
967 /* Connected but not enabled, enable the block */
968 } else if (!dp->active) {
969 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
970 ret = cdn_dp_enable(dp);
972 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
973 dp->connected = false;
976 /* Enabled and connected to a dongle without a sink, notify userspace */
977 } else if (!cdn_dp_check_sink_connection(dp)) {
978 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
979 dp->connected = false;
981 /* Enabled and connected with a sink, re-train if requested */
982 } else if (!cdn_dp_check_link_status(dp)) {
983 unsigned int rate = dp->link.rate;
984 unsigned int lanes = dp->link.num_lanes;
985 struct drm_display_mode *mode = &dp->mode;
987 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
988 ret = cdn_dp_train_link(dp);
990 dp->connected = false;
991 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
995 /* If training result is changed, update the video config */
997 (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
998 ret = cdn_dp_config_video(dp);
1000 dp->connected = false;
1001 DRM_DEV_ERROR(dp->dev,
1002 "Failed to config video %d\n",
1009 mutex_unlock(&dp->lock);
1011 old_status = connector->status;
1012 connector->status = connector->funcs->detect(connector, false);
1013 if (old_status != connector->status)
1014 drm_kms_helper_hotplug_event(dp->drm_dev);
1017 static int cdn_dp_pd_event(struct notifier_block *nb,
1018 unsigned long event, void *priv)
1020 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1022 struct cdn_dp_device *dp = port->dp;
1025 * It would be nice to be able to just do the work inline right here.
1026 * However, we need to make a bunch of calls that might sleep in order
1027 * to turn on the block/phy, so use a worker instead.
1029 schedule_work(&dp->event_work);
1034 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1036 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1037 struct drm_encoder *encoder;
1038 struct drm_connector *connector;
1039 struct cdn_dp_port *port;
1040 struct drm_device *drm_dev = data;
1043 ret = cdn_dp_parse_dt(dp);
1047 dp->drm_dev = drm_dev;
1048 dp->connected = false;
1050 dp->active_port = -1;
1051 dp->fw_loaded = false;
1053 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1055 encoder = &dp->encoder;
1057 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1059 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1061 ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1062 DRM_MODE_ENCODER_TMDS, NULL);
1064 DRM_ERROR("failed to initialize encoder with drm\n");
1068 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1070 connector = &dp->connector;
1071 connector->polled = DRM_CONNECTOR_POLL_HPD;
1072 connector->dpms = DRM_MODE_DPMS_OFF;
1074 ret = drm_connector_init(drm_dev, connector,
1075 &cdn_dp_atomic_connector_funcs,
1076 DRM_MODE_CONNECTOR_DisplayPort);
1078 DRM_ERROR("failed to initialize connector with drm\n");
1079 goto err_free_encoder;
1082 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1084 ret = drm_mode_connector_attach_encoder(connector, encoder);
1086 DRM_ERROR("failed to attach connector and encoder\n");
1087 goto err_free_connector;
1090 for (i = 0; i < dp->ports; i++) {
1093 port->event_nb.notifier_call = cdn_dp_pd_event;
1094 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1099 "register EXTCON_DISP_DP notifier err\n");
1100 goto err_free_connector;
1104 pm_runtime_enable(dev);
1106 schedule_work(&dp->event_work);
1111 drm_connector_cleanup(connector);
1113 drm_encoder_cleanup(encoder);
1117 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1119 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1120 struct drm_encoder *encoder = &dp->encoder;
1121 struct drm_connector *connector = &dp->connector;
1123 cancel_work_sync(&dp->event_work);
1124 cdn_dp_encoder_disable(encoder);
1125 encoder->funcs->destroy(encoder);
1126 connector->funcs->destroy(connector);
1128 pm_runtime_disable(dev);
1130 release_firmware(dp->fw);
1135 static const struct component_ops cdn_dp_component_ops = {
1136 .bind = cdn_dp_bind,
1137 .unbind = cdn_dp_unbind,
1140 int cdn_dp_suspend(struct device *dev)
1142 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1145 mutex_lock(&dp->lock);
1147 ret = cdn_dp_disable(dp);
1148 dp->suspended = true;
1149 mutex_unlock(&dp->lock);
1154 int cdn_dp_resume(struct device *dev)
1156 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1158 mutex_lock(&dp->lock);
1159 dp->suspended = false;
1161 schedule_work(&dp->event_work);
1162 mutex_unlock(&dp->lock);
1167 static int cdn_dp_probe(struct platform_device *pdev)
1169 struct device *dev = &pdev->dev;
1170 const struct of_device_id *match;
1171 struct cdn_dp_data *dp_data;
1172 struct cdn_dp_port *port;
1173 struct cdn_dp_device *dp;
1174 struct extcon_dev *extcon;
1178 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1183 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1184 dp_data = (struct cdn_dp_data *)match->data;
1186 for (i = 0; i < dp_data->max_phy; i++) {
1187 extcon = extcon_get_edev_by_phandle(dev, i);
1188 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1190 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1191 PTR_ERR(phy) == -EPROBE_DEFER)
1192 return -EPROBE_DEFER;
1194 if (IS_ERR(extcon) || IS_ERR(phy))
1197 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1201 port->extcon = extcon;
1205 dp->port[dp->ports++] = port;
1209 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1213 mutex_init(&dp->lock);
1214 dev_set_drvdata(dev, dp);
1216 cdn_dp_audio_codec_init(dp, dev);
1218 return component_add(dev, &cdn_dp_component_ops);
1221 static int cdn_dp_remove(struct platform_device *pdev)
1223 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1225 platform_device_unregister(dp->audio_pdev);
1226 cdn_dp_suspend(dp->dev);
1227 component_del(&pdev->dev, &cdn_dp_component_ops);
1232 static void cdn_dp_shutdown(struct platform_device *pdev)
1234 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1236 cdn_dp_suspend(dp->dev);
1239 static const struct dev_pm_ops cdn_dp_pm_ops = {
1240 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1244 struct platform_driver cdn_dp_driver = {
1245 .probe = cdn_dp_probe,
1246 .remove = cdn_dp_remove,
1247 .shutdown = cdn_dp_shutdown,
1250 .owner = THIS_MODULE,
1251 .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1252 .pm = &cdn_dp_pm_ops,