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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
- * Author: Chris Zhong <zyw@rock-chips.com>
- */
- #include <linux/clk.h>
- #include <linux/component.h>
- #include <linux/extcon.h>
- #include <linux/firmware.h>
- #include <linux/mfd/syscon.h>
- #include <linux/phy/phy.h>
- #include <linux/regmap.h>
- #include <linux/reset.h>
- #include <sound/hdmi-codec.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_dp_helper.h>
- #include <drm/drm_edid.h>
- #include <drm/drm_of.h>
- #include <drm/drm_probe_helper.h>
- #include <drm/drm_simple_kms_helper.h>
- #include "cdn-dp-core.h"
- #include "cdn-dp-reg.h"
- #include "rockchip_drm_vop.h"
- #define connector_to_dp(c) \
- container_of(c, struct cdn_dp_device, connector)
- #define encoder_to_dp(c) \
- container_of(c, struct cdn_dp_device, encoder)
- #define GRF_SOC_CON9 0x6224
- #define DP_SEL_VOP_LIT BIT(12)
- #define GRF_SOC_CON26 0x6268
- #define DPTX_HPD_SEL (3 << 12)
- #define DPTX_HPD_DEL (2 << 12)
- #define DPTX_HPD_SEL_MASK (3 << 28)
- #define CDN_FW_TIMEOUT_MS (64 * 1000)
- #define CDN_DPCD_TIMEOUT_MS 5000
- #define CDN_DP_FIRMWARE "rockchip/dptx.bin"
- struct cdn_dp_data {
- u8 max_phy;
- };
- struct cdn_dp_data rk3399_cdn_dp = {
- .max_phy = 2,
- };
- static const struct of_device_id cdn_dp_dt_ids[] = {
- { .compatible = "rockchip,rk3399-cdn-dp",
- .data = (void *)&rk3399_cdn_dp },
- {}
- };
- MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
- static int cdn_dp_grf_write(struct cdn_dp_device *dp,
- unsigned int reg, unsigned int val)
- {
- int ret;
- ret = clk_prepare_enable(dp->grf_clk);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
- return ret;
- }
- ret = regmap_write(dp->grf, reg, val);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
- clk_disable_unprepare(dp->grf_clk);
- return ret;
- }
- clk_disable_unprepare(dp->grf_clk);
- return 0;
- }
- static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
- {
- int ret;
- unsigned long rate;
- ret = clk_prepare_enable(dp->pclk);
- if (ret < 0) {
- DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
- goto err_pclk;
- }
- ret = clk_prepare_enable(dp->core_clk);
- if (ret < 0) {
- DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
- goto err_core_clk;
- }
- ret = pm_runtime_get_sync(dp->dev);
- if (ret < 0) {
- DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
- goto err_pm_runtime_get;
- }
- reset_control_assert(dp->core_rst);
- reset_control_assert(dp->dptx_rst);
- reset_control_assert(dp->apb_rst);
- reset_control_deassert(dp->core_rst);
- reset_control_deassert(dp->dptx_rst);
- reset_control_deassert(dp->apb_rst);
- rate = clk_get_rate(dp->core_clk);
- if (!rate) {
- DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
- ret = -EINVAL;
- goto err_set_rate;
- }
- cdn_dp_set_fw_clk(dp, rate);
- cdn_dp_clock_reset(dp);
- return 0;
- err_set_rate:
- pm_runtime_put(dp->dev);
- err_pm_runtime_get:
- clk_disable_unprepare(dp->core_clk);
- err_core_clk:
- clk_disable_unprepare(dp->pclk);
- err_pclk:
- return ret;
- }
- static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
- {
- pm_runtime_put_sync(dp->dev);
- clk_disable_unprepare(dp->pclk);
- clk_disable_unprepare(dp->core_clk);
- }
- static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
- {
- struct extcon_dev *edev = port->extcon;
- union extcon_property_value property;
- int dptx;
- u8 lanes;
- dptx = extcon_get_state(edev, EXTCON_DISP_DP);
- if (dptx > 0) {
- extcon_get_property(edev, EXTCON_DISP_DP,
- EXTCON_PROP_USB_SS, &property);
- if (property.intval)
- lanes = 2;
- else
- lanes = 4;
- } else {
- lanes = 0;
- }
- return lanes;
- }
- static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
- {
- int ret;
- u8 value;
- *sink_count = 0;
- ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
- if (ret)
- return ret;
- *sink_count = DP_GET_SINK_COUNT(value);
- return 0;
- }
- static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
- {
- struct cdn_dp_port *port;
- int i, lanes;
- for (i = 0; i < dp->ports; i++) {
- port = dp->port[i];
- lanes = cdn_dp_get_port_lanes(port);
- if (lanes)
- return port;
- }
- return NULL;
- }
- static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
- {
- unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
- struct cdn_dp_port *port;
- u8 sink_count = 0;
- if (dp->active_port < 0 || dp->active_port >= dp->ports) {
- DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
- return false;
- }
- port = dp->port[dp->active_port];
- /*
- * Attempt to read sink count, retry in case the sink may not be ready.
- *
- * Sinks are *supposed* to come up within 1ms from an off state, but
- * some docks need more time to power up.
- */
- while (time_before(jiffies, timeout)) {
- if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
- return false;
- if (!cdn_dp_get_sink_count(dp, &sink_count))
- return sink_count ? true : false;
- usleep_range(5000, 10000);
- }
- DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
- return false;
- }
- static enum drm_connector_status
- cdn_dp_connector_detect(struct drm_connector *connector, bool force)
- {
- struct cdn_dp_device *dp = connector_to_dp(connector);
- enum drm_connector_status status = connector_status_disconnected;
- mutex_lock(&dp->lock);
- if (dp->connected)
- status = connector_status_connected;
- mutex_unlock(&dp->lock);
- return status;
- }
- static void cdn_dp_connector_destroy(struct drm_connector *connector)
- {
- drm_connector_unregister(connector);
- drm_connector_cleanup(connector);
- }
- static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
- .detect = cdn_dp_connector_detect,
- .destroy = cdn_dp_connector_destroy,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .reset = drm_atomic_helper_connector_reset,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
- };
- static int cdn_dp_connector_get_modes(struct drm_connector *connector)
- {
- struct cdn_dp_device *dp = connector_to_dp(connector);
- struct edid *edid;
- int ret = 0;
- mutex_lock(&dp->lock);
- edid = dp->edid;
- if (edid) {
- DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
- edid->width_cm, edid->height_cm);
- dp->sink_has_audio = drm_detect_monitor_audio(edid);
- ret = drm_add_edid_modes(connector, edid);
- if (ret)
- drm_connector_update_edid_property(connector,
- edid);
- }
- mutex_unlock(&dp->lock);
- return ret;
- }
- static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
- {
- struct cdn_dp_device *dp = connector_to_dp(connector);
- struct drm_display_info *display_info = &dp->connector.display_info;
- u32 requested, actual, rate, sink_max, source_max = 0;
- u8 lanes, bpc;
- /* If DP is disconnected, every mode is invalid */
- if (!dp->connected)
- return MODE_BAD;
- switch (display_info->bpc) {
- case 10:
- bpc = 10;
- break;
- case 6:
- bpc = 6;
- break;
- default:
- bpc = 8;
- break;
- }
- requested = mode->clock * bpc * 3 / 1000;
- source_max = dp->lanes;
- sink_max = drm_dp_max_lane_count(dp->dpcd);
- lanes = min(source_max, sink_max);
- source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
- sink_max = drm_dp_max_link_rate(dp->dpcd);
- rate = min(source_max, sink_max);
- actual = rate * lanes / 100;
- /* efficiency is about 0.8 */
- actual = actual * 8 / 10;
- if (requested > actual) {
- DRM_DEV_DEBUG_KMS(dp->dev,
- "requested=%d, actual=%d, clock=%d\n",
- requested, actual, mode->clock);
- return MODE_CLOCK_HIGH;
- }
- return MODE_OK;
- }
- static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
- .get_modes = cdn_dp_connector_get_modes,
- .mode_valid = cdn_dp_connector_mode_valid,
- };
- static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
- {
- int ret;
- const u32 *iram_data, *dram_data;
- const struct firmware *fw = dp->fw;
- const struct cdn_firmware_header *hdr;
- hdr = (struct cdn_firmware_header *)fw->data;
- if (fw->size != le32_to_cpu(hdr->size_bytes)) {
- DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
- return -EINVAL;
- }
- iram_data = (const u32 *)(fw->data + hdr->header_size);
- dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
- ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
- dram_data, hdr->dram_size);
- if (ret)
- return ret;
- ret = cdn_dp_set_firmware_active(dp, true);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
- return ret;
- }
- return cdn_dp_event_config(dp);
- }
- static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
- {
- int ret;
- if (!cdn_dp_check_sink_connection(dp))
- return -ENODEV;
- ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
- DP_RECEIVER_CAP_SIZE);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
- return ret;
- }
- kfree(dp->edid);
- dp->edid = drm_do_get_edid(&dp->connector,
- cdn_dp_get_edid_block, dp);
- return 0;
- }
- static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
- {
- union extcon_property_value property;
- int ret;
- if (!port->phy_enabled) {
- ret = phy_power_on(port->phy);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
- ret);
- goto err_phy;
- }
- port->phy_enabled = true;
- }
- ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
- DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
- goto err_power_on;
- }
- ret = cdn_dp_get_hpd_status(dp);
- if (ret <= 0) {
- if (!ret)
- DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
- goto err_power_on;
- }
- ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
- EXTCON_PROP_USB_TYPEC_POLARITY, &property);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "get property failed\n");
- goto err_power_on;
- }
- port->lanes = cdn_dp_get_port_lanes(port);
- ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
- ret);
- goto err_power_on;
- }
- dp->active_port = port->id;
- return 0;
- err_power_on:
- if (phy_power_off(port->phy))
- DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
- else
- port->phy_enabled = false;
- err_phy:
- cdn_dp_grf_write(dp, GRF_SOC_CON26,
- DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
- return ret;
- }
- static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
- struct cdn_dp_port *port)
- {
- int ret;
- if (port->phy_enabled) {
- ret = phy_power_off(port->phy);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
- return ret;
- }
- }
- port->phy_enabled = false;
- port->lanes = 0;
- dp->active_port = -1;
- return 0;
- }
- static int cdn_dp_disable(struct cdn_dp_device *dp)
- {
- int ret, i;
- if (!dp->active)
- return 0;
- for (i = 0; i < dp->ports; i++)
- cdn_dp_disable_phy(dp, dp->port[i]);
- ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
- DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
- ret);
- return ret;
- }
- cdn_dp_set_firmware_active(dp, false);
- cdn_dp_clk_disable(dp);
- dp->active = false;
- dp->max_lanes = 0;
- dp->max_rate = 0;
- if (!dp->connected) {
- kfree(dp->edid);
- dp->edid = NULL;
- }
- return 0;
- }
- static int cdn_dp_enable(struct cdn_dp_device *dp)
- {
- int ret, i, lanes;
- struct cdn_dp_port *port;
- port = cdn_dp_connected_port(dp);
- if (!port) {
- DRM_DEV_ERROR(dp->dev,
- "Can't enable without connection\n");
- return -ENODEV;
- }
- if (dp->active)
- return 0;
- ret = cdn_dp_clk_enable(dp);
- if (ret)
- return ret;
- ret = cdn_dp_firmware_init(dp);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
- goto err_clk_disable;
- }
- /* only enable the port that connected with downstream device */
- for (i = port->id; i < dp->ports; i++) {
- port = dp->port[i];
- lanes = cdn_dp_get_port_lanes(port);
- if (lanes) {
- ret = cdn_dp_enable_phy(dp, port);
- if (ret)
- continue;
- ret = cdn_dp_get_sink_capability(dp);
- if (ret) {
- cdn_dp_disable_phy(dp, port);
- } else {
- dp->active = true;
- dp->lanes = port->lanes;
- return 0;
- }
- }
- }
- err_clk_disable:
- cdn_dp_clk_disable(dp);
- return ret;
- }
- static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted)
- {
- struct cdn_dp_device *dp = encoder_to_dp(encoder);
- struct drm_display_info *display_info = &dp->connector.display_info;
- struct video_info *video = &dp->video_info;
- switch (display_info->bpc) {
- case 10:
- video->color_depth = 10;
- break;
- case 6:
- video->color_depth = 6;
- break;
- default:
- video->color_depth = 8;
- break;
- }
- video->color_fmt = PXL_RGB;
- video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
- video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
- memcpy(&dp->mode, adjusted, sizeof(*mode));
- }
- static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
- {
- u8 link_status[DP_LINK_STATUS_SIZE];
- struct cdn_dp_port *port = cdn_dp_connected_port(dp);
- u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
- if (!port || !dp->max_rate || !dp->max_lanes)
- return false;
- if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
- DP_LINK_STATUS_SIZE)) {
- DRM_ERROR("Failed to get link status\n");
- return false;
- }
- /* if link training is requested we should perform it always */
- return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
- }
- static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
- {
- struct cdn_dp_device *dp = encoder_to_dp(encoder);
- int ret, val;
- ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
- if (ret < 0) {
- DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
- return;
- }
- DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
- (ret) ? "LIT" : "BIG");
- if (ret)
- val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
- else
- val = DP_SEL_VOP_LIT << 16;
- ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
- if (ret)
- return;
- mutex_lock(&dp->lock);
- ret = cdn_dp_enable(dp);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
- ret);
- goto out;
- }
- if (!cdn_dp_check_link_status(dp)) {
- ret = cdn_dp_train_link(dp);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
- goto out;
- }
- }
- ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
- goto out;
- }
- ret = cdn_dp_config_video(dp);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
- goto out;
- }
- ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
- goto out;
- }
- out:
- mutex_unlock(&dp->lock);
- }
- static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
- {
- struct cdn_dp_device *dp = encoder_to_dp(encoder);
- int ret;
- mutex_lock(&dp->lock);
- if (dp->active) {
- ret = cdn_dp_disable(dp);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
- ret);
- }
- }
- mutex_unlock(&dp->lock);
- /*
- * In the following 2 cases, we need to run the event_work to re-enable
- * the DP:
- * 1. If there is not just one port device is connected, and remove one
- * device from a port, the DP will be disabled here, at this case,
- * run the event_work to re-open DP for the other port.
- * 2. If re-training or re-config failed, the DP will be disabled here.
- * run the event_work to re-connect it.
- */
- if (!dp->connected && cdn_dp_connected_port(dp))
- schedule_work(&dp->event_work);
- }
- static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
- {
- struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
- s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
- s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
- return 0;
- }
- static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
- .mode_set = cdn_dp_encoder_mode_set,
- .enable = cdn_dp_encoder_enable,
- .disable = cdn_dp_encoder_disable,
- .atomic_check = cdn_dp_encoder_atomic_check,
- };
- static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
- {
- struct device *dev = dp->dev;
- struct device_node *np = dev->of_node;
- struct platform_device *pdev = to_platform_device(dev);
- struct resource *res;
- dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
- if (IS_ERR(dp->grf)) {
- DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
- return PTR_ERR(dp->grf);
- }
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- dp->regs = devm_ioremap_resource(dev, res);
- if (IS_ERR(dp->regs)) {
- DRM_DEV_ERROR(dev, "ioremap reg failed\n");
- return PTR_ERR(dp->regs);
- }
- dp->core_clk = devm_clk_get(dev, "core-clk");
- if (IS_ERR(dp->core_clk)) {
- DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
- return PTR_ERR(dp->core_clk);
- }
- dp->pclk = devm_clk_get(dev, "pclk");
- if (IS_ERR(dp->pclk)) {
- DRM_DEV_ERROR(dev, "cannot get pclk\n");
- return PTR_ERR(dp->pclk);
- }
- dp->spdif_clk = devm_clk_get(dev, "spdif");
- if (IS_ERR(dp->spdif_clk)) {
- DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
- return PTR_ERR(dp->spdif_clk);
- }
- dp->grf_clk = devm_clk_get(dev, "grf");
- if (IS_ERR(dp->grf_clk)) {
- DRM_DEV_ERROR(dev, "cannot get grf clk\n");
- return PTR_ERR(dp->grf_clk);
- }
- dp->spdif_rst = devm_reset_control_get(dev, "spdif");
- if (IS_ERR(dp->spdif_rst)) {
- DRM_DEV_ERROR(dev, "no spdif reset control found\n");
- return PTR_ERR(dp->spdif_rst);
- }
- dp->dptx_rst = devm_reset_control_get(dev, "dptx");
- if (IS_ERR(dp->dptx_rst)) {
- DRM_DEV_ERROR(dev, "no uphy reset control found\n");
- return PTR_ERR(dp->dptx_rst);
- }
- dp->core_rst = devm_reset_control_get(dev, "core");
- if (IS_ERR(dp->core_rst)) {
- DRM_DEV_ERROR(dev, "no core reset control found\n");
- return PTR_ERR(dp->core_rst);
- }
- dp->apb_rst = devm_reset_control_get(dev, "apb");
- if (IS_ERR(dp->apb_rst)) {
- DRM_DEV_ERROR(dev, "no apb reset control found\n");
- return PTR_ERR(dp->apb_rst);
- }
- return 0;
- }
- static int cdn_dp_audio_hw_params(struct device *dev, void *data,
- struct hdmi_codec_daifmt *daifmt,
- struct hdmi_codec_params *params)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- struct audio_info audio = {
- .sample_width = params->sample_width,
- .sample_rate = params->sample_rate,
- .channels = params->channels,
- };
- int ret;
- mutex_lock(&dp->lock);
- if (!dp->active) {
- ret = -ENODEV;
- goto out;
- }
- switch (daifmt->fmt) {
- case HDMI_I2S:
- audio.format = AFMT_I2S;
- break;
- case HDMI_SPDIF:
- audio.format = AFMT_SPDIF;
- break;
- default:
- DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
- ret = -EINVAL;
- goto out;
- }
- ret = cdn_dp_audio_config(dp, &audio);
- if (!ret)
- dp->audio_info = audio;
- out:
- mutex_unlock(&dp->lock);
- return ret;
- }
- static void cdn_dp_audio_shutdown(struct device *dev, void *data)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- int ret;
- mutex_lock(&dp->lock);
- if (!dp->active)
- goto out;
- ret = cdn_dp_audio_stop(dp, &dp->audio_info);
- if (!ret)
- dp->audio_info.format = AFMT_UNUSED;
- out:
- mutex_unlock(&dp->lock);
- }
- static int cdn_dp_audio_mute_stream(struct device *dev, void *data,
- bool enable, int direction)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- int ret;
- mutex_lock(&dp->lock);
- if (!dp->active) {
- ret = -ENODEV;
- goto out;
- }
- ret = cdn_dp_audio_mute(dp, enable);
- out:
- mutex_unlock(&dp->lock);
- return ret;
- }
- static int cdn_dp_audio_get_eld(struct device *dev, void *data,
- u8 *buf, size_t len)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
- return 0;
- }
- static const struct hdmi_codec_ops audio_codec_ops = {
- .hw_params = cdn_dp_audio_hw_params,
- .audio_shutdown = cdn_dp_audio_shutdown,
- .mute_stream = cdn_dp_audio_mute_stream,
- .get_eld = cdn_dp_audio_get_eld,
- .no_capture_mute = 1,
- };
- static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
- struct device *dev)
- {
- struct hdmi_codec_pdata codec_data = {
- .i2s = 1,
- .spdif = 1,
- .ops = &audio_codec_ops,
- .max_i2s_channels = 8,
- };
- dp->audio_pdev = platform_device_register_data(
- dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
- &codec_data, sizeof(codec_data));
- return PTR_ERR_OR_ZERO(dp->audio_pdev);
- }
- static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
- {
- int ret;
- unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
- unsigned long sleep = 1000;
- WARN_ON(!mutex_is_locked(&dp->lock));
- if (dp->fw_loaded)
- return 0;
- /* Drop the lock before getting the firmware to avoid blocking boot */
- mutex_unlock(&dp->lock);
- while (time_before(jiffies, timeout)) {
- ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
- if (ret == -ENOENT) {
- msleep(sleep);
- sleep *= 2;
- continue;
- } else if (ret) {
- DRM_DEV_ERROR(dp->dev,
- "failed to request firmware: %d\n", ret);
- goto out;
- }
- dp->fw_loaded = true;
- ret = 0;
- goto out;
- }
- DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
- ret = -ETIMEDOUT;
- out:
- mutex_lock(&dp->lock);
- return ret;
- }
- static void cdn_dp_pd_event_work(struct work_struct *work)
- {
- struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
- event_work);
- struct drm_connector *connector = &dp->connector;
- enum drm_connector_status old_status;
- int ret;
- mutex_lock(&dp->lock);
- if (dp->suspended)
- goto out;
- ret = cdn_dp_request_firmware(dp);
- if (ret)
- goto out;
- dp->connected = true;
- /* Not connected, notify userspace to disable the block */
- if (!cdn_dp_connected_port(dp)) {
- DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
- dp->connected = false;
- /* Connected but not enabled, enable the block */
- } else if (!dp->active) {
- DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
- ret = cdn_dp_enable(dp);
- if (ret) {
- DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
- dp->connected = false;
- }
- /* Enabled and connected to a dongle without a sink, notify userspace */
- } else if (!cdn_dp_check_sink_connection(dp)) {
- DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
- dp->connected = false;
- /* Enabled and connected with a sink, re-train if requested */
- } else if (!cdn_dp_check_link_status(dp)) {
- unsigned int rate = dp->max_rate;
- unsigned int lanes = dp->max_lanes;
- struct drm_display_mode *mode = &dp->mode;
- DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
- ret = cdn_dp_train_link(dp);
- if (ret) {
- dp->connected = false;
- DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
- goto out;
- }
- /* If training result is changed, update the video config */
- if (mode->clock &&
- (rate != dp->max_rate || lanes != dp->max_lanes)) {
- ret = cdn_dp_config_video(dp);
- if (ret) {
- dp->connected = false;
- DRM_DEV_ERROR(dp->dev,
- "Failed to config video %d\n",
- ret);
- }
- }
- }
- out:
- mutex_unlock(&dp->lock);
- old_status = connector->status;
- connector->status = connector->funcs->detect(connector, false);
- if (old_status != connector->status)
- drm_kms_helper_hotplug_event(dp->drm_dev);
- }
- static int cdn_dp_pd_event(struct notifier_block *nb,
- unsigned long event, void *priv)
- {
- struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
- event_nb);
- struct cdn_dp_device *dp = port->dp;
- /*
- * It would be nice to be able to just do the work inline right here.
- * However, we need to make a bunch of calls that might sleep in order
- * to turn on the block/phy, so use a worker instead.
- */
- schedule_work(&dp->event_work);
- return NOTIFY_DONE;
- }
- static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- struct drm_encoder *encoder;
- struct drm_connector *connector;
- struct cdn_dp_port *port;
- struct drm_device *drm_dev = data;
- int ret, i;
- ret = cdn_dp_parse_dt(dp);
- if (ret < 0)
- return ret;
- dp->drm_dev = drm_dev;
- dp->connected = false;
- dp->active = false;
- dp->active_port = -1;
- dp->fw_loaded = false;
- INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
- encoder = &dp->encoder;
- encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
- dev->of_node);
- DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
- ret = drm_simple_encoder_init(drm_dev, encoder,
- DRM_MODE_ENCODER_TMDS);
- if (ret) {
- DRM_ERROR("failed to initialize encoder with drm\n");
- return ret;
- }
- drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
- connector = &dp->connector;
- connector->polled = DRM_CONNECTOR_POLL_HPD;
- connector->dpms = DRM_MODE_DPMS_OFF;
- ret = drm_connector_init(drm_dev, connector,
- &cdn_dp_atomic_connector_funcs,
- DRM_MODE_CONNECTOR_DisplayPort);
- if (ret) {
- DRM_ERROR("failed to initialize connector with drm\n");
- goto err_free_encoder;
- }
- drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
- ret = drm_connector_attach_encoder(connector, encoder);
- if (ret) {
- DRM_ERROR("failed to attach connector and encoder\n");
- goto err_free_connector;
- }
- for (i = 0; i < dp->ports; i++) {
- port = dp->port[i];
- port->event_nb.notifier_call = cdn_dp_pd_event;
- ret = devm_extcon_register_notifier(dp->dev, port->extcon,
- EXTCON_DISP_DP,
- &port->event_nb);
- if (ret) {
- DRM_DEV_ERROR(dev,
- "register EXTCON_DISP_DP notifier err\n");
- goto err_free_connector;
- }
- }
- pm_runtime_enable(dev);
- schedule_work(&dp->event_work);
- return 0;
- err_free_connector:
- drm_connector_cleanup(connector);
- err_free_encoder:
- drm_encoder_cleanup(encoder);
- return ret;
- }
- static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- struct drm_encoder *encoder = &dp->encoder;
- struct drm_connector *connector = &dp->connector;
- cancel_work_sync(&dp->event_work);
- cdn_dp_encoder_disable(encoder);
- encoder->funcs->destroy(encoder);
- connector->funcs->destroy(connector);
- pm_runtime_disable(dev);
- if (dp->fw_loaded)
- release_firmware(dp->fw);
- kfree(dp->edid);
- dp->edid = NULL;
- }
- static const struct component_ops cdn_dp_component_ops = {
- .bind = cdn_dp_bind,
- .unbind = cdn_dp_unbind,
- };
- static int cdn_dp_suspend(struct device *dev)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- int ret = 0;
- mutex_lock(&dp->lock);
- if (dp->active)
- ret = cdn_dp_disable(dp);
- dp->suspended = true;
- mutex_unlock(&dp->lock);
- return ret;
- }
- static __maybe_unused int cdn_dp_resume(struct device *dev)
- {
- struct cdn_dp_device *dp = dev_get_drvdata(dev);
- mutex_lock(&dp->lock);
- dp->suspended = false;
- if (dp->fw_loaded)
- schedule_work(&dp->event_work);
- mutex_unlock(&dp->lock);
- return 0;
- }
- static int cdn_dp_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- const struct of_device_id *match;
- struct cdn_dp_data *dp_data;
- struct cdn_dp_port *port;
- struct cdn_dp_device *dp;
- struct extcon_dev *extcon;
- struct phy *phy;
- int i;
- dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
- if (!dp)
- return -ENOMEM;
- dp->dev = dev;
- match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
- dp_data = (struct cdn_dp_data *)match->data;
- for (i = 0; i < dp_data->max_phy; i++) {
- extcon = extcon_get_edev_by_phandle(dev, i);
- phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
- if (PTR_ERR(extcon) == -EPROBE_DEFER ||
- PTR_ERR(phy) == -EPROBE_DEFER)
- return -EPROBE_DEFER;
- if (IS_ERR(extcon) || IS_ERR(phy))
- continue;
- port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
- if (!port)
- return -ENOMEM;
- port->extcon = extcon;
- port->phy = phy;
- port->dp = dp;
- port->id = i;
- dp->port[dp->ports++] = port;
- }
- if (!dp->ports) {
- DRM_DEV_ERROR(dev, "missing extcon or phy\n");
- return -EINVAL;
- }
- mutex_init(&dp->lock);
- dev_set_drvdata(dev, dp);
- cdn_dp_audio_codec_init(dp, dev);
- return component_add(dev, &cdn_dp_component_ops);
- }
- static int cdn_dp_remove(struct platform_device *pdev)
- {
- struct cdn_dp_device *dp = platform_get_drvdata(pdev);
- platform_device_unregister(dp->audio_pdev);
- cdn_dp_suspend(dp->dev);
- component_del(&pdev->dev, &cdn_dp_component_ops);
- return 0;
- }
- static void cdn_dp_shutdown(struct platform_device *pdev)
- {
- struct cdn_dp_device *dp = platform_get_drvdata(pdev);
- cdn_dp_suspend(dp->dev);
- }
- static const struct dev_pm_ops cdn_dp_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
- cdn_dp_resume)
- };
- struct platform_driver cdn_dp_driver = {
- .probe = cdn_dp_probe,
- .remove = cdn_dp_remove,
- .shutdown = cdn_dp_shutdown,
- .driver = {
- .name = "cdn-dp",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(cdn_dp_dt_ids),
- .pm = &cdn_dp_pm_ops,
- },
- };
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