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/hdmi-notifier.h>
27 #include <linux/regmap.h>
28 #include <linux/reset.h>
29 #include <linux/mfd/syscon.h>
30 #include <linux/phy/phy.h>
32 #include <sound/hdmi-codec.h>
34 #include "cdn-dp-core.h"
35 #include "cdn-dp-reg.h"
36 #include "rockchip_drm_vop.h"
38 #define connector_to_dp(c) \
39 container_of(c, struct cdn_dp_device, connector)
41 #define encoder_to_dp(c) \
42 container_of(c, struct cdn_dp_device, encoder)
44 #define GRF_SOC_CON9 0x6224
45 #define DP_SEL_VOP_LIT BIT(12)
46 #define GRF_SOC_CON26 0x6268
47 #define DPTX_HPD_SEL (3 << 12)
48 #define DPTX_HPD_DEL (2 << 12)
49 #define DPTX_HPD_SEL_MASK (3 << 28)
51 #define CDN_FW_TIMEOUT_MS (64 * 1000)
52 #define CDN_DPCD_TIMEOUT_MS 5000
53 #define CDN_DP_FIRMWARE "rockchip/dptx.bin"
59 struct cdn_dp_data rk3399_cdn_dp = {
63 static const struct of_device_id cdn_dp_dt_ids[] = {
64 { .compatible = "rockchip,rk3399-cdn-dp",
65 .data = (void *)&rk3399_cdn_dp },
69 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
71 static int cdn_dp_grf_write(struct cdn_dp_device *dp,
72 unsigned int reg, unsigned int val)
76 ret = clk_prepare_enable(dp->grf_clk);
78 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
82 ret = regmap_write(dp->grf, reg, val);
84 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
88 clk_disable_unprepare(dp->grf_clk);
93 static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
98 ret = clk_prepare_enable(dp->pclk);
100 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
104 ret = clk_prepare_enable(dp->core_clk);
106 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
110 ret = pm_runtime_get_sync(dp->dev);
112 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
116 reset_control_assert(dp->core_rst);
117 reset_control_assert(dp->dptx_rst);
118 reset_control_assert(dp->apb_rst);
119 reset_control_deassert(dp->core_rst);
120 reset_control_deassert(dp->dptx_rst);
121 reset_control_deassert(dp->apb_rst);
123 rate = clk_get_rate(dp->core_clk);
125 DRM_DEV_ERROR(dp->dev, "get clk rate failed: %d\n", rate);
129 cdn_dp_set_fw_clk(dp, rate);
130 cdn_dp_clock_reset(dp);
135 clk_disable_unprepare(dp->core_clk);
137 clk_disable_unprepare(dp->pclk);
142 static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
144 pm_runtime_put_sync(dp->dev);
145 clk_disable_unprepare(dp->pclk);
146 clk_disable_unprepare(dp->core_clk);
149 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
151 struct extcon_dev *edev = port->extcon;
152 union extcon_property_value property;
156 dptx = extcon_get_state(edev, EXTCON_DISP_DP);
158 extcon_get_property(edev, EXTCON_DISP_DP,
159 EXTCON_PROP_USB_SS, &property);
171 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
177 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
181 *sink_count = DP_GET_SINK_COUNT(value);
185 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
187 struct cdn_dp_port *port;
190 for (i = 0; i < dp->ports; i++) {
192 lanes = cdn_dp_get_port_lanes(port);
199 static enum drm_connector_status
200 cdn_dp_connector_detect(struct drm_connector *connector, bool force)
202 struct cdn_dp_device *dp = connector_to_dp(connector);
203 enum drm_connector_status status = connector_status_disconnected;
205 mutex_lock(&dp->lock);
207 status = connector_status_connected;
208 mutex_unlock(&dp->lock);
213 static void cdn_dp_connector_destroy(struct drm_connector *connector)
215 drm_connector_unregister(connector);
216 drm_connector_cleanup(connector);
219 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
220 .dpms = drm_atomic_helper_connector_dpms,
221 .detect = cdn_dp_connector_detect,
222 .destroy = cdn_dp_connector_destroy,
223 .fill_modes = drm_helper_probe_single_connector_modes,
224 .reset = drm_atomic_helper_connector_reset,
225 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
226 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
229 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
231 struct cdn_dp_device *dp = connector_to_dp(connector);
235 mutex_lock(&dp->lock);
238 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
239 edid->width_cm, edid->height_cm);
241 dp->sink_has_audio = drm_detect_monitor_audio(edid);
242 ret = drm_add_edid_modes(connector, edid);
244 drm_mode_connector_update_edid_property(connector,
246 drm_edid_to_eld(connector, edid);
249 mutex_unlock(&dp->lock);
254 static struct drm_encoder *
255 cdn_dp_connector_best_encoder(struct drm_connector *connector)
257 struct cdn_dp_device *dp = connector_to_dp(connector);
262 static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
263 struct drm_display_mode *mode)
265 struct cdn_dp_device *dp = connector_to_dp(connector);
266 struct drm_display_info *display_info = &dp->connector.display_info;
267 u32 requested, actual, rate, sink_max, source_max = 0;
268 struct drm_encoder *encoder = connector->encoder;
269 enum drm_mode_status status = MODE_OK;
270 struct drm_device *dev = connector->dev;
271 struct rockchip_drm_private *priv = dev->dev_private;
272 struct drm_crtc *crtc;
275 /* If DP is disconnected, every mode is invalid */
279 switch (display_info->bpc) {
291 requested = mode->clock * bpc * 3 / 1000;
293 source_max = dp->lanes;
294 sink_max = drm_dp_max_lane_count(dp->dpcd);
295 lanes = min(source_max, sink_max);
297 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
298 sink_max = drm_dp_max_link_rate(dp->dpcd);
299 rate = min(source_max, sink_max);
301 actual = rate * lanes / 100;
303 /* efficiency is about 0.8 */
304 actual = actual * 8 / 10;
306 if (requested > actual) {
307 DRM_DEV_DEBUG_KMS(dp->dev,
308 "requested=%d, actual=%d, clock=%d\n",
309 requested, actual, mode->clock);
310 return MODE_CLOCK_HIGH;
314 const struct drm_connector_helper_funcs *funcs;
316 funcs = connector->helper_private;
317 if (funcs->atomic_best_encoder)
318 encoder = funcs->atomic_best_encoder(connector,
321 encoder = funcs->best_encoder(connector);
324 if (!encoder || !encoder->possible_crtcs)
327 * ensure all drm display mode can work, if someone want support more
328 * resolutions, please limit the possible_crtc, only connect to
331 drm_for_each_crtc(crtc, connector->dev) {
332 int pipe = drm_crtc_index(crtc);
333 const struct rockchip_crtc_funcs *funcs =
334 priv->crtc_funcs[pipe];
336 if (!(encoder->possible_crtcs & drm_crtc_mask(crtc)))
338 if (!funcs || !funcs->mode_valid)
341 status = funcs->mode_valid(crtc, mode,
342 DRM_MODE_CONNECTOR_HDMIA);
343 if (status != MODE_OK)
350 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
351 .get_modes = cdn_dp_connector_get_modes,
352 .best_encoder = cdn_dp_connector_best_encoder,
353 .mode_valid = cdn_dp_connector_mode_valid,
356 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
359 const u32 *iram_data, *dram_data;
360 const struct firmware *fw = dp->fw;
361 const struct cdn_firmware_header *hdr;
363 hdr = (struct cdn_firmware_header *)fw->data;
364 if (fw->size != le32_to_cpu(hdr->size_bytes)) {
365 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
369 iram_data = (const u32 *)(fw->data + hdr->header_size);
370 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
372 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
373 dram_data, hdr->dram_size);
377 ret = cdn_dp_set_firmware_active(dp, true);
379 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
383 return cdn_dp_event_config(dp);
386 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp,
387 struct cdn_dp_port *port,
391 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
394 * Attempt to read sink count & sink capability, retry in case the sink
397 * Sinks are *supposed* to come up within 1ms from an off state, but
398 * some docks need more time to power up.
400 while (time_before(jiffies, timeout)) {
401 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
404 if (cdn_dp_get_sink_count(dp, sink_count)) {
405 usleep_range(5000, 10000);
412 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
413 DP_RECEIVER_CAP_SIZE);
415 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
420 dp->edid = drm_do_get_edid(&dp->connector,
421 cdn_dp_get_edid_block, dp);
425 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
429 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
431 union extcon_property_value property;
434 if (!port->phy_enabled) {
435 ret = phy_power_on(port->phy);
437 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
441 port->phy_enabled = true;
444 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
445 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
447 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
451 ret = cdn_dp_get_hpd_status(dp);
454 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
458 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
459 EXTCON_PROP_USB_TYPEC_POLARITY, &property);
461 DRM_DEV_ERROR(dp->dev, "get property failed\n");
465 port->lanes = cdn_dp_get_port_lanes(port);
466 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
468 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
476 if (phy_power_off(port->phy))
477 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
479 port->phy_enabled = false;
482 cdn_dp_grf_write(dp, GRF_SOC_CON26,
483 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
487 static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
488 struct cdn_dp_port *port)
492 if (port->phy_enabled) {
493 ret = phy_power_off(port->phy);
495 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
500 port->phy_enabled = false;
505 static int cdn_dp_disable(struct cdn_dp_device *dp)
512 for (i = 0; i < dp->ports; i++)
513 cdn_dp_disable_phy(dp, dp->port[i]);
515 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
516 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
518 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
523 cdn_dp_set_firmware_active(dp, false);
524 cdn_dp_clk_disable(dp);
527 dp->link.num_lanes = 0;
528 if (!dp->connected) {
536 static int cdn_dp_enable(struct cdn_dp_device *dp)
539 struct cdn_dp_port *port;
542 port = cdn_dp_connected_port(dp);
544 DRM_DEV_ERROR(dp->dev,
545 "Can't enable without connection\n");
552 ret = cdn_dp_clk_enable(dp);
556 ret = cdn_dp_firmware_init(dp);
558 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
559 goto err_clk_disable;
562 /* only enable the port that connected with downstream device */
563 for (i = port->id; i < dp->ports; i++) {
565 lanes = cdn_dp_get_port_lanes(port);
567 ret = cdn_dp_enable_phy(dp, port);
571 ret = cdn_dp_get_sink_capability(dp, port, &sink_count);
572 if (ret || (!ret && !sink_count)) {
573 cdn_dp_disable_phy(dp, port);
576 dp->lanes = port->lanes;
583 cdn_dp_clk_disable(dp);
587 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
588 struct drm_display_mode *mode,
589 struct drm_display_mode *adjusted)
591 struct cdn_dp_device *dp = encoder_to_dp(encoder);
592 struct drm_display_info *display_info = &dp->connector.display_info;
593 struct rockchip_crtc_state *state;
594 struct video_info *video = &dp->video_info;
597 switch (display_info->bpc) {
599 video->color_depth = 10;
602 video->color_depth = 6;
605 video->color_depth = 8;
609 video->color_fmt = PXL_RGB;
611 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
612 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
614 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
616 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
620 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
621 (ret) ? "LIT" : "BIG");
622 state = to_rockchip_crtc_state(encoder->crtc->state);
624 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
625 state->output_mode = ROCKCHIP_OUT_MODE_P888;
627 val = DP_SEL_VOP_LIT << 16;
628 state->output_mode = ROCKCHIP_OUT_MODE_AAAA;
631 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
635 memcpy(&dp->mode, adjusted, sizeof(*mode));
638 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
640 u8 link_status[DP_LINK_STATUS_SIZE];
641 struct cdn_dp_port *port = cdn_dp_connected_port(dp);
642 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
644 if (!port || !dp->link.rate || !dp->link.num_lanes)
647 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
648 DP_LINK_STATUS_SIZE)) {
649 DRM_ERROR("Failed to get link status\n");
653 /* if link training is requested we should perform it always */
654 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
657 static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
659 struct cdn_dp_device *dp = encoder_to_dp(encoder);
662 mutex_lock(&dp->lock);
663 ret = cdn_dp_enable(dp);
665 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
669 if (!cdn_dp_check_link_status(dp)) {
670 ret = cdn_dp_train_link(dp);
672 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
677 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
679 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
683 ret = cdn_dp_config_video(dp);
685 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
689 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
691 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
695 mutex_unlock(&dp->lock);
698 switch_set_state(&dp->switchdev, 1);
700 hdmi_event_connect(dp->dev);
705 static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
707 struct cdn_dp_device *dp = encoder_to_dp(encoder);
710 mutex_lock(&dp->lock);
712 ret = cdn_dp_disable(dp);
714 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
718 mutex_unlock(&dp->lock);
720 switch_set_state(&dp->switchdev, 0);
722 hdmi_event_disconnect(dp->dev);
726 * In the following 2 cases, we need to run the event_work to re-enable
728 * 1. If there is not just one port device is connected, and remove one
729 * device from a port, the DP will be disabled here, at this case,
730 * run the event_work to re-open DP for the other port.
731 * 2. If re-training or re-config failed, the DP will be disabled here.
732 * run the event_work to re-connect it.
734 if (!dp->connected && cdn_dp_connected_port(dp))
735 schedule_work(&dp->event_work);
738 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
739 struct drm_crtc_state *crtc_state,
740 struct drm_connector_state *conn_state)
742 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
744 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
745 s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
750 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
751 .mode_set = cdn_dp_encoder_mode_set,
752 .enable = cdn_dp_encoder_enable,
753 .disable = cdn_dp_encoder_disable,
754 .atomic_check = cdn_dp_encoder_atomic_check,
757 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
758 .destroy = drm_encoder_cleanup,
761 static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
763 struct device *dev = dp->dev;
764 struct device_node *np = dev->of_node;
765 struct platform_device *pdev = to_platform_device(dev);
766 struct resource *res;
768 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
769 if (IS_ERR(dp->grf)) {
770 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
771 return PTR_ERR(dp->grf);
774 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
775 dp->regs = devm_ioremap_resource(dev, res);
776 if (IS_ERR(dp->regs)) {
777 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
778 return PTR_ERR(dp->regs);
781 dp->core_clk = devm_clk_get(dev, "core-clk");
782 if (IS_ERR(dp->core_clk)) {
783 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
784 return PTR_ERR(dp->core_clk);
787 dp->pclk = devm_clk_get(dev, "pclk");
788 if (IS_ERR(dp->pclk)) {
789 DRM_DEV_ERROR(dev, "cannot get pclk\n");
790 return PTR_ERR(dp->pclk);
793 dp->spdif_clk = devm_clk_get(dev, "spdif");
794 if (IS_ERR(dp->spdif_clk)) {
795 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
796 return PTR_ERR(dp->spdif_clk);
799 dp->grf_clk = devm_clk_get(dev, "grf");
800 if (IS_ERR(dp->grf_clk)) {
801 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
802 return PTR_ERR(dp->grf_clk);
805 dp->spdif_rst = devm_reset_control_get(dev, "spdif");
806 if (IS_ERR(dp->spdif_rst)) {
807 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
808 return PTR_ERR(dp->spdif_rst);
811 dp->dptx_rst = devm_reset_control_get(dev, "dptx");
812 if (IS_ERR(dp->dptx_rst)) {
813 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
814 return PTR_ERR(dp->dptx_rst);
817 dp->core_rst = devm_reset_control_get(dev, "core");
818 if (IS_ERR(dp->core_rst)) {
819 DRM_DEV_ERROR(dev, "no core reset control found\n");
820 return PTR_ERR(dp->core_rst);
823 dp->apb_rst = devm_reset_control_get(dev, "apb");
824 if (IS_ERR(dp->apb_rst)) {
825 DRM_DEV_ERROR(dev, "no apb reset control found\n");
826 return PTR_ERR(dp->apb_rst);
832 static int cdn_dp_audio_hw_params(struct device *dev, void *data,
833 struct hdmi_codec_daifmt *daifmt,
834 struct hdmi_codec_params *params)
836 struct cdn_dp_device *dp = dev_get_drvdata(dev);
837 struct audio_info audio = {
838 .sample_width = params->sample_width,
839 .sample_rate = params->sample_rate,
840 .channels = params->channels,
844 mutex_lock(&dp->lock);
850 switch (daifmt->fmt) {
852 audio.format = AFMT_I2S;
855 audio.format = AFMT_SPDIF;
858 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
863 ret = cdn_dp_audio_config(dp, &audio);
865 dp->audio_info = audio;
868 mutex_unlock(&dp->lock);
872 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
874 struct cdn_dp_device *dp = dev_get_drvdata(dev);
877 mutex_lock(&dp->lock);
881 ret = cdn_dp_audio_stop(dp, &dp->audio_info);
883 dp->audio_info.format = AFMT_UNUSED;
885 mutex_unlock(&dp->lock);
888 static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
891 struct cdn_dp_device *dp = dev_get_drvdata(dev);
894 mutex_lock(&dp->lock);
900 ret = cdn_dp_audio_mute(dp, enable);
903 mutex_unlock(&dp->lock);
907 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
910 struct cdn_dp_device *dp = dev_get_drvdata(dev);
912 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
917 static const struct hdmi_codec_ops audio_codec_ops = {
918 .hw_params = cdn_dp_audio_hw_params,
919 .audio_shutdown = cdn_dp_audio_shutdown,
920 .digital_mute = cdn_dp_audio_digital_mute,
921 .get_eld = cdn_dp_audio_get_eld,
924 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
927 struct hdmi_codec_pdata codec_data = {
930 .ops = &audio_codec_ops,
931 .max_i2s_channels = 8,
934 dp->audio_pdev = platform_device_register_data(
935 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
936 &codec_data, sizeof(codec_data));
938 return PTR_ERR_OR_ZERO(dp->audio_pdev);
941 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
944 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
945 unsigned long sleep = 1000;
947 WARN_ON(!mutex_is_locked(&dp->lock));
952 /* Drop the lock before getting the firmware to avoid blocking boot */
953 mutex_unlock(&dp->lock);
955 while (time_before(jiffies, timeout)) {
956 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
957 if (ret == -ENOENT) {
962 DRM_DEV_ERROR(dp->dev,
963 "failed to request firmware: %d\n", ret);
967 dp->fw_loaded = true;
972 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
975 mutex_lock(&dp->lock);
979 static void cdn_dp_pd_event_work(struct work_struct *work)
981 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
983 struct drm_connector *connector = &dp->connector;
984 enum drm_connector_status old_status;
989 mutex_lock(&dp->lock);
994 ret = cdn_dp_request_firmware(dp);
998 dp->connected = true;
1000 /* Not connected, notify userspace to disable the block */
1001 if (!cdn_dp_connected_port(dp)) {
1002 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
1003 dp->connected = false;
1005 /* Connected but not enabled, enable the block */
1006 } else if (!dp->active) {
1007 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
1008 ret = cdn_dp_enable(dp);
1010 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
1011 dp->connected = false;
1014 /* Enabled and connected to a dongle without a sink, notify userspace */
1015 } else if (cdn_dp_get_sink_count(dp, &sink_count) || !sink_count) {
1016 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
1017 dp->connected = false;
1019 /* Enabled and connected with a sink, re-train if requested */
1020 } else if (!cdn_dp_check_link_status(dp)) {
1021 unsigned int rate = dp->link.rate;
1022 unsigned int lanes = dp->link.num_lanes;
1023 struct drm_display_mode *mode = &dp->mode;
1025 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
1026 ret = cdn_dp_train_link(dp);
1028 dp->connected = false;
1029 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
1033 /* If training result is changed, update the video config */
1035 (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
1036 ret = cdn_dp_config_video(dp);
1038 dp->connected = false;
1039 DRM_DEV_ERROR(dp->dev,
1040 "Failed to config video %d\n",
1047 mutex_unlock(&dp->lock);
1049 old_status = connector->status;
1050 connector->status = connector->funcs->detect(connector, false);
1051 if (old_status != connector->status)
1052 drm_kms_helper_hotplug_event(dp->drm_dev);
1055 static int cdn_dp_pd_event(struct notifier_block *nb,
1056 unsigned long event, void *priv)
1058 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1060 struct cdn_dp_device *dp = port->dp;
1063 * It would be nice to be able to just do the work inline right here.
1064 * However, we need to make a bunch of calls that might sleep in order
1065 * to turn on the block/phy, so use a worker instead.
1067 schedule_work(&dp->event_work);
1072 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1074 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1075 struct drm_encoder *encoder;
1076 struct drm_connector *connector;
1077 struct cdn_dp_port *port;
1078 struct drm_device *drm_dev = data;
1081 ret = cdn_dp_parse_dt(dp);
1085 dp->drm_dev = drm_dev;
1086 dp->connected = false;
1089 mutex_init(&dp->lock);
1090 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1092 encoder = &dp->encoder;
1094 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1096 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1098 ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1099 DRM_MODE_ENCODER_TMDS, NULL);
1101 DRM_ERROR("failed to initialize encoder with drm\n");
1105 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1107 connector = &dp->connector;
1108 connector->polled = DRM_CONNECTOR_POLL_HPD;
1109 connector->dpms = DRM_MODE_DPMS_OFF;
1111 ret = drm_connector_init(drm_dev, connector,
1112 &cdn_dp_atomic_connector_funcs,
1113 DRM_MODE_CONNECTOR_DisplayPort);
1115 DRM_ERROR("failed to initialize connector with drm\n");
1116 goto err_free_encoder;
1119 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1121 #ifdef CONFIG_SWITCH
1122 dp->switchdev.name = "cdn-dp";
1123 switch_dev_register(&dp->switchdev);
1126 ret = drm_mode_connector_attach_encoder(connector, encoder);
1128 DRM_ERROR("failed to attach connector and encoder\n");
1129 goto err_free_connector;
1132 cdn_dp_audio_codec_init(dp, dev);
1134 for (i = 0; i < dp->ports; i++) {
1137 port->event_nb.notifier_call = cdn_dp_pd_event;
1138 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1143 "register EXTCON_DISP_DP notifier err\n");
1144 goto err_free_connector;
1148 pm_runtime_enable(dev);
1150 schedule_work(&dp->event_work);
1155 drm_connector_cleanup(connector);
1157 drm_encoder_cleanup(encoder);
1161 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1163 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1164 struct drm_encoder *encoder = &dp->encoder;
1165 struct drm_connector *connector = &dp->connector;
1167 #ifdef CONFIG_SWITCH
1168 switch_dev_unregister(&dp->switchdev);
1171 cancel_work_sync(&dp->event_work);
1172 platform_device_unregister(dp->audio_pdev);
1173 cdn_dp_encoder_disable(encoder);
1174 encoder->funcs->destroy(encoder);
1175 connector->funcs->destroy(connector);
1177 pm_runtime_disable(dev);
1178 release_firmware(dp->fw);
1183 static const struct component_ops cdn_dp_component_ops = {
1184 .bind = cdn_dp_bind,
1185 .unbind = cdn_dp_unbind,
1188 int cdn_dp_suspend(struct device *dev)
1190 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1193 mutex_lock(&dp->lock);
1195 ret = cdn_dp_disable(dp);
1196 dp->suspended = true;
1197 mutex_unlock(&dp->lock);
1202 int cdn_dp_resume(struct device *dev)
1204 struct cdn_dp_device *dp = dev_get_drvdata(dev);
1206 mutex_lock(&dp->lock);
1207 dp->suspended = false;
1209 schedule_work(&dp->event_work);
1210 mutex_unlock(&dp->lock);
1215 static int cdn_dp_probe(struct platform_device *pdev)
1217 struct device *dev = &pdev->dev;
1218 const struct of_device_id *match;
1219 struct cdn_dp_data *dp_data;
1220 struct cdn_dp_port *port;
1221 struct cdn_dp_device *dp;
1222 struct extcon_dev *extcon;
1226 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1231 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1232 dp_data = (struct cdn_dp_data *)match->data;
1234 for (i = 0; i < dp_data->max_phy; i++) {
1235 extcon = extcon_get_edev_by_phandle(dev, i);
1236 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1238 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1239 PTR_ERR(phy) == -EPROBE_DEFER)
1240 return -EPROBE_DEFER;
1242 if (IS_ERR(extcon) || IS_ERR(phy))
1245 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1249 port->extcon = extcon;
1253 dp->port[dp->ports++] = port;
1257 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1261 dev_set_drvdata(dev, dp);
1263 return component_add(dev, &cdn_dp_component_ops);
1266 static int cdn_dp_remove(struct platform_device *pdev)
1268 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1270 cdn_dp_suspend(dp->dev);
1271 component_del(&pdev->dev, &cdn_dp_component_ops);
1276 static void cdn_dp_shutdown(struct platform_device *pdev)
1278 struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1280 cdn_dp_suspend(dp->dev);
1283 static const struct dev_pm_ops cdn_dp_pm_ops = {
1284 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1288 static struct platform_driver cdn_dp_driver = {
1289 .probe = cdn_dp_probe,
1290 .remove = cdn_dp_remove,
1291 .shutdown = cdn_dp_shutdown,
1294 .owner = THIS_MODULE,
1295 .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1296 .pm = &cdn_dp_pm_ops,
1300 module_platform_driver(cdn_dp_driver);
1302 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
1303 MODULE_DESCRIPTION("cdn DP Driver");
1304 MODULE_LICENSE("GPL v2");