diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/cadence/cdns-dp-core.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/cadence/cdns-dp-core.c | 881 |
1 files changed, 881 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c new file mode 100644 index 000000000000..0b7afd009995 --- /dev/null +++ b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c @@ -0,0 +1,881 @@ +/* + * Cadence Display Port Interface (DP) driver + * + * Copyright 2019 NXP + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ +#include <drm/bridge/cdns-mhdp.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_encoder_slave.h> +#include <drm/drm_hdcp.h> +#include <drm/drm_of.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_vblank.h> +#include <drm/drm_print.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of_device.h> + +#include "cdns-mhdp-hdcp.h" +#include "cdns-hdcp-common.h" + +#define CDNS_DP_HPD_POLL_DWN_LOOP 5 +#define CDNS_DP_HPD_POLL_DWN_DLY_US 200 +#define CDNS_DP_HPD_POLL_UP_LOOP 5 +#define CDNS_DP_HPD_POLL_UP_DLY_US 1000 + +/* + * This function only implements native DPDC reads and writes + */ +static ssize_t dp_aux_transfer(struct drm_dp_aux *aux, + struct drm_dp_aux_msg *msg) +{ + struct cdns_mhdp_device *mhdp = dev_get_drvdata(aux->dev); + bool native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ); + int ret; + + /* Ignore address only message , for native */ + if ((native == true) && ((msg->size == 0) || (msg->buffer == NULL))) { + msg->reply = DP_AUX_NATIVE_REPLY_ACK; + return msg->size; + } + + /* msg sanity check */ + if (msg->size > DP_AUX_MAX_PAYLOAD_BYTES) { + dev_err(mhdp->dev, "%s: invalid msg: size(%zu), request(%x)\n", + __func__, msg->size, (unsigned int)msg->request); + return -EINVAL; + } + + if (msg->request == DP_AUX_NATIVE_WRITE) { + const u8 *buf = msg->buffer; + int i; + for (i = 0; i < msg->size; ++i) { + ret = cdns_mhdp_dpcd_write(mhdp, + msg->address + i, buf[i]); + if (!ret) + continue; + + DRM_DEV_ERROR(mhdp->dev, "Failed to write DPCD\n"); + + return ret; + } + msg->reply = DP_AUX_NATIVE_REPLY_ACK; + return msg->size; + } + + if (msg->request == DP_AUX_NATIVE_READ) { + ret = cdns_mhdp_dpcd_read(mhdp, msg->address, msg->buffer, + msg->size); + if (ret < 0) + return -EIO; + msg->reply = DP_AUX_NATIVE_REPLY_ACK; + return msg->size; + } + + if (((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_WRITE) + || ((msg->request & ~DP_AUX_I2C_MOT) == + DP_AUX_I2C_WRITE_STATUS_UPDATE)) { + + u8 i2c_status = 0u; + u16 respSize = 0u; + + ret = cdns_mhdp_i2c_write(mhdp, msg->address, + msg->buffer, + !!(msg->request & DP_AUX_I2C_MOT), + msg->size, &respSize); + + if (ret < 0) { + dev_err(aux->dev, "cdns_mhdp_i2c_write status %d\n", + ret); + return -EIO; + } + + ret = cdns_mhdp_get_last_i2c_status(mhdp, &i2c_status); + if (ret < 0) { + dev_err(aux->dev, + "cdns_mhdp_get_last_i2c_status status %d\n", + ret); + return -EIO; + } + + switch (i2c_status) { + case 0u: + msg->reply = DP_AUX_I2C_REPLY_ACK; + break; + case 1u: + msg->reply = DP_AUX_I2C_REPLY_NACK; + break; + case 2u: + msg->reply = DP_AUX_I2C_REPLY_DEFER; + break; + default: + msg->reply = DP_AUX_I2C_REPLY_NACK; + break; + } + + return respSize; + } + + if ((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_READ) { + + u8 i2c_status = 0u; + u16 respSize = 0u; + + ret = cdns_mhdp_i2c_read(mhdp, msg->address, msg->buffer, + msg->size, + !!(msg->request & DP_AUX_I2C_MOT), + &respSize); + if (ret < 0) + return -EIO; + + ret = cdns_mhdp_get_last_i2c_status(mhdp, &i2c_status); + + if (ret < 0) { + dev_err(aux->dev, + "cdns_mhdp_get_last_i2c_status ret %d\n", ret); + return -EIO; + } + + switch (i2c_status) { + case 0u: + msg->reply = DP_AUX_I2C_REPLY_ACK; + break; + case 1u: + msg->reply = DP_AUX_I2C_REPLY_NACK; + break; + case 2u: + msg->reply = DP_AUX_I2C_REPLY_DEFER; + break; + default: + msg->reply = DP_AUX_I2C_REPLY_NACK; + break; + } + + return respSize; + } + + return 0; +} + +static int dp_aux_init(struct cdns_mhdp_device *mhdp, + struct device *dev) +{ + int ret; + + mhdp->dp.aux.name = "imx_dp_aux"; + mhdp->dp.aux.dev = dev; + mhdp->dp.aux.drm_dev = mhdp->drm_dev; + mhdp->dp.aux.transfer = dp_aux_transfer; + + ret = drm_dp_aux_register(&mhdp->dp.aux); + + return ret; +} + +static int dp_aux_destroy(struct cdns_mhdp_device *mhdp) +{ + drm_dp_aux_unregister(&mhdp->dp.aux); + return 0; +} + +static void dp_pixel_clk_reset(struct cdns_mhdp_device *mhdp) +{ + u32 val; + + /* reset pixel clk */ + val = cdns_mhdp_reg_read(mhdp, SOURCE_HDTX_CAR); + cdns_mhdp_reg_write(mhdp, SOURCE_HDTX_CAR, val & 0xFD); + cdns_mhdp_reg_write(mhdp, SOURCE_HDTX_CAR, val); +} + +static void cdns_dp_mode_set(struct cdns_mhdp_device *mhdp) +{ + u32 lane_mapping = mhdp->lane_mapping; + int ret; + + cdns_mhdp_plat_call(mhdp, pclk_rate); + + /* delay for DP FW stable after pixel clock relock */ + msleep(50); + + dp_pixel_clk_reset(mhdp); + + /* Get DP Caps */ + ret = drm_dp_dpcd_read(&mhdp->dp.aux, DP_DPCD_REV, mhdp->dp.dpcd, + DP_RECEIVER_CAP_SIZE); + if (ret < 0) { + DRM_ERROR("Failed to get caps %d\n", ret); + return; + } + + mhdp->dp.rate = drm_dp_max_link_rate(mhdp->dp.dpcd); + mhdp->dp.num_lanes = drm_dp_max_lane_count(mhdp->dp.dpcd); + mhdp->dp.link_training_type = DP_TX_FULL_LINK_TRAINING; + + /* check the max link rate */ + if (mhdp->dp.rate > CDNS_DP_MAX_LINK_RATE) + mhdp->dp.rate = CDNS_DP_MAX_LINK_RATE; + + /* Initialize link rate/num_lanes as panel max link rate/max_num_lanes */ + cdns_mhdp_plat_call(mhdp, phy_set); + + /* Video off */ + ret = cdns_mhdp_set_video_status(mhdp, CONTROL_VIDEO_IDLE); + if (ret) { + DRM_DEV_ERROR(mhdp->dev, "Failed to valid video %d\n", ret); + return; + } + + /* Line swaping */ + cdns_mhdp_reg_write(mhdp, LANES_CONFIG, 0x00400000 | lane_mapping); + + /* Set DP host capability */ + ret = cdns_mhdp_set_host_cap(mhdp); + if (ret) { + DRM_DEV_ERROR(mhdp->dev, "Failed to set host cap %d\n", ret); + return; + } + + ret = cdns_mhdp_config_video(mhdp); + if (ret) { + DRM_DEV_ERROR(mhdp->dev, "Failed to config video %d\n", ret); + return; + } + + return; +} + +void cdns_dp_handle_hpd_irq(struct cdns_mhdp_device *mhdp) +{ + u8 status[6]; + + mutex_lock(&mhdp->lock); + cdns_mhdp_dpcd_read(mhdp, 0x200, &status[0], 6); + DRM_DEBUG_DRIVER("DPCD HPD IRQ STATUS: %08x\n", status[1]); + cdns_mhdp_dpcd_write(mhdp, 0x201, status[1]); + mutex_unlock(&mhdp->lock); +} + +/* ----------------------------------------------------------------------------- + * dp TX Setup + */ +static enum drm_connector_status +cdns_dp_connector_detect(struct drm_connector *connector, bool force) +{ + struct cdns_mhdp_device *mhdp = container_of(connector, + struct cdns_mhdp_device, connector.base); + u8 hpd = 0xf; + mutex_lock(&mhdp->lock); + hpd = cdns_mhdp_read_hpd(mhdp); + mutex_unlock(&mhdp->lock); + DRM_DEBUG_DRIVER("%s hpd = %d\n", __func__, hpd); + + if (mhdp->force_disconnected_sts && (hpd == 1)) { + DRM_DEBUG_DRIVER("Returning disconnect status until ready\n"); + return connector_status_disconnected; + } + if (hpd == 0) + /* Cable Disconnedted */ + return connector_status_disconnected; + else if (hpd == 3) { + /* Cable Connected and seen IRQ*/ + DRM_DEBUG_DRIVER("Warning! Missed HPD IRQ event seen\n"); + return connector_status_connected; + } else if (hpd == 1) + /* Cable Connected */ + return connector_status_connected; + + /* Cable status unknown */ + DRM_DEBUG_DRIVER("Unknown cable status, hdp=%u\n", hpd); + return connector_status_unknown; +} + +static int cdns_dp_connector_get_modes(struct drm_connector *connector) +{ + struct cdns_mhdp_device *mhdp = container_of(connector, + struct cdns_mhdp_device, connector.base); + int num_modes = 0; + struct edid *edid; + + edid = drm_do_get_edid(&mhdp->connector.base, + cdns_mhdp_get_edid_block, mhdp); + if (edid) { + DRM_DEBUG_DRIVER("%x,%x,%x,%x,%x,%x,%x,%x\n", + edid->header[0], edid->header[1], + edid->header[2], edid->header[3], + edid->header[4], edid->header[5], + edid->header[6], edid->header[7]); + drm_connector_update_edid_property(connector, edid); + num_modes = drm_add_edid_modes(connector, edid); + kfree(edid); + } + + if (num_modes == 0) + DRM_ERROR("Invalid edid\n"); + return num_modes; +} + +static bool blob_equal(const struct drm_property_blob *a, + const struct drm_property_blob *b) +{ + if (a && b) + return a->length == b->length && + !memcmp(a->data, b->data, a->length); + + return !a == !b; +} + +static int cdns_dp_connector_atomic_check(struct drm_connector *connector, + struct drm_atomic_state *state) +{ + struct drm_connector_state *new_con_state = + drm_atomic_get_new_connector_state(state, connector); + struct drm_connector_state *old_con_state = + drm_atomic_get_old_connector_state(state, connector); + struct drm_crtc *crtc = new_con_state->crtc; + struct drm_crtc_state *new_crtc_state; + + cdns_hdcp_atomic_check(connector, old_con_state, new_con_state); + if (!new_con_state->crtc) + return 0; + + new_crtc_state = drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(new_crtc_state)) + return PTR_ERR(new_crtc_state); + + if (!blob_equal(new_con_state->hdr_output_metadata, + old_con_state->hdr_output_metadata) || + new_con_state->colorspace != old_con_state->colorspace) { + + new_crtc_state->mode_changed = + !new_con_state->hdr_output_metadata || + !old_con_state->hdr_output_metadata || + new_con_state->colorspace != old_con_state->colorspace; + } + + /* + * These properties are handled by fastset, and might not end up in a + * modeset. + */ + if (new_con_state->picture_aspect_ratio != + old_con_state->picture_aspect_ratio || + new_con_state->content_type != old_con_state->content_type || + new_con_state->scaling_mode != old_con_state->scaling_mode) + new_crtc_state->mode_changed = true; + return 0; +} + +static const struct drm_connector_funcs cdns_dp_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = cdns_dp_connector_detect, + .destroy = drm_connector_cleanup, + .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 const struct drm_connector_helper_funcs cdns_dp_connector_helper_funcs = { + .get_modes = cdns_dp_connector_get_modes, + .atomic_check = cdns_dp_connector_atomic_check, +}; + +static int cdns_dp_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct cdns_mhdp_device *mhdp = bridge->driver_private; + struct drm_encoder *encoder = bridge->encoder; + struct drm_connector *connector = &mhdp->connector.base; + int ret; + + connector->interlace_allowed = 1; + + if (mhdp->is_hpd) + connector->polled = DRM_CONNECTOR_POLL_HPD; + else + connector->polled = DRM_CONNECTOR_POLL_CONNECT | + DRM_CONNECTOR_POLL_DISCONNECT; + + drm_connector_helper_add(connector, &cdns_dp_connector_helper_funcs); + + ret = drm_connector_init(bridge->dev, connector, &cdns_dp_connector_funcs, + DRM_MODE_CONNECTOR_DisplayPort); + if (ret < 0) { + DRM_ERROR("Failed to initialize connector\n"); + return ret; + } + + drm_connector_attach_encoder(connector, encoder); + + drm_connector_attach_content_protection_property(connector, true); + + return 0; +} + +static enum drm_mode_status +cdns_dp_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + enum drm_mode_status mode_status = MODE_OK; + + /* We don't support double-clocked modes */ + if (mode->flags & DRM_MODE_FLAG_DBLCLK || + mode->flags & DRM_MODE_FLAG_INTERLACE) + return MODE_BAD; + + /* MAX support pixel clock rate 594MHz */ + if (mode->clock > 594000) + return MODE_CLOCK_HIGH; + + /* 5120 x 2160 is the maximum supported resulution */ + if (mode->hdisplay > 5120) + return MODE_BAD_HVALUE; + + if (mode->vdisplay > 2160) + return MODE_BAD_VVALUE; + + return mode_status; +} + +static void cdns_dp_bridge_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *orig_mode, + const struct drm_display_mode *mode) +{ + struct cdns_mhdp_device *mhdp = bridge->driver_private; + struct drm_display_info *display_info = &mhdp->connector.base.display_info; + struct video_info *video = &mhdp->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); + + DRM_DEBUG_DRIVER("Mode: %dx%dp%d\n", mode->hdisplay, mode->vdisplay, + mode->clock); + memcpy(&mhdp->mode, mode, sizeof(struct drm_display_mode)); + + mutex_lock(&mhdp->lock); + cdns_dp_mode_set(mhdp); + mutex_unlock(&mhdp->lock); + + /* reset force mode set flag */ + mhdp->force_mode_set = false; +} + +static void cdn_dp_bridge_enable(struct drm_bridge *bridge) +{ + struct cdns_mhdp_device *mhdp = bridge->driver_private; + struct drm_connector_state *conn_state = mhdp->connector.base.state; + int ret; + + mutex_lock(&mhdp->lock); + /* Link trainning */ + ret = cdns_mhdp_train_link(mhdp); + if (ret) { + DRM_DEV_ERROR(mhdp->dev, "Failed link train %d\n", ret); + mutex_unlock(&mhdp->lock); + return; + } + mutex_unlock(&mhdp->lock); + + ret = cdns_mhdp_set_video_status(mhdp, CONTROL_VIDEO_VALID); + if (ret) { + DRM_DEV_ERROR(mhdp->dev, "Failed to valid video %d\n", ret); + return; + } + + if (conn_state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED) + cdns_hdcp_enable(mhdp); + +} + +static void cdn_dp_bridge_disable(struct drm_bridge *bridge) +{ + struct cdns_mhdp_device *mhdp = bridge->driver_private; + + cdns_hdcp_disable(mhdp); + + cdns_mhdp_set_video_status(mhdp, CONTROL_VIDEO_IDLE); +} + +static const struct drm_bridge_funcs cdns_dp_bridge_funcs = { + .attach = cdns_dp_bridge_attach, + .enable = cdn_dp_bridge_enable, + .disable = cdn_dp_bridge_disable, + .mode_set = cdns_dp_bridge_mode_set, + .mode_valid = cdns_dp_bridge_mode_valid, +}; + +static void hotplug_work_func(struct work_struct *work) +{ + struct cdns_mhdp_device *mhdp = container_of(work, + struct cdns_mhdp_device, + hotplug_work.work); + struct drm_connector *connector = &mhdp->connector.base; + enum drm_connector_status connector_sts; + int loop_cnt, retry; + + DRM_DEBUG_DRIVER("Starting %s\n", __func__); + + if (connector->status == connector_status_connected) { + /* Need to check if we had an IRQ event */ + u8 hpd = 0xf; + + mutex_lock(&mhdp->lock); + hpd = cdns_mhdp_read_hpd(mhdp); + mutex_unlock(&mhdp->lock); + DRM_DEBUG_DRIVER("cdns_mhdp_read_hpd = %d\n", hpd); + if (hpd == 3) { + /* Cable Connected and seen IRQ*/ + DRM_DEBUG_DRIVER("HPD IRQ event seen\n"); + cdns_dp_handle_hpd_irq(mhdp); + connector_sts = connector_status_connected; + } else if (hpd == 1) + connector_sts = connector_status_connected; + else if (hpd == 0) + connector_sts = connector_status_disconnected; + else + connector_sts = connector_status_unknown; + + /* if was connected then there may have been unplug event, + * either wait 900us then call cdns_dp_connector_detect and if + * still connected then just ignore and finish or poll a + * certain number of times. Otherwise set status to unconnected + * and call the hotplug_event function. + */ + for (loop_cnt = 0; loop_cnt < CDNS_DP_HPD_POLL_DWN_LOOP; + loop_cnt++) { + udelay(CDNS_DP_HPD_POLL_DWN_DLY_US); + if (loop_cnt > 0) + connector_sts = + cdns_dp_connector_detect(connector, false); + if (connector_sts != connector_status_connected) { + DRM_DEBUG_DRIVER("HDMI/DP Cable Plug Out\n"); + break; + } + } + if (connector_sts == connector_status_connected) { + DRM_DEBUG_DRIVER("Finished %s - early\n", __func__); + return; + } + /* Disable HDCP when cable plugout, + * set content_protection to DESIRED, recovery HDCP state after cable plugin + */ + if (connector->state->content_protection + != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { + connector->state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED; + mhdp->hdcp.state = HDCP_STATE_DISABLING; + } + DRM_DEBUG_DRIVER("Calling drm_kms_helper_hotplug_event\n"); + /* Note that before we call the helper functions we need + * to force the cdns_dp_connector_detect function from + * returning a connected status since the DRM functions + * still end up calling that in a roundabout way when we + * signal a status change. We need to do this to ensure + * that a shutdown proper completes and don't end up in + * a strange state. + */ + mhdp->force_disconnected_sts = true; + connector->status = connector_sts; + drm_kms_helper_hotplug_event(connector->dev); + /* There was a disconnection so give some time to allow + * things to clean up + */ + DRM_DEBUG_DRIVER("Start sleep\n"); + msleep(75); + DRM_DEBUG_DRIVER("End sleep\n"); + mhdp->force_disconnected_sts = false; + } else { + /* Disconnected or unknown status */ + /* if was disconnected possibly a connect event, call + * cdns_dp_connector_detect multiple times to validate before + * updating to connected status and calling the hotplug event + * function. This is needed since the HW/FW can take some time + * to validate. + */ + for (loop_cnt = 0; loop_cnt < CDNS_DP_HPD_POLL_UP_LOOP; + loop_cnt++) { + msleep(CDNS_DP_HPD_POLL_UP_DLY_US / 1000); + connector_sts = + cdns_dp_connector_detect(connector, false); + if (connector_sts == connector_status_connected) { + DRM_DEBUG_DRIVER("HDMI/DP Cable Plug In\n"); + /* Recovery HDCP state */ + if (connector->state->content_protection + != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) + mhdp->hdcp.state = HDCP_STATE_ENABLING; + break; + } + } + if (connector_sts == connector_status_connected) { + DRM_DEBUG_DRIVER("Calling drm_kms_helper_hotplug_event\n"); + connector->status = connector_sts; + drm_kms_helper_hotplug_event(connector->dev); + } + } + + /* check connection status one more time in case there had been a short + * disconnect that might have caused re-connect to be missed, if so + * schedule again. + */ + retry = 1; + do { + connector_sts = cdns_dp_connector_detect(connector, false); + if (connector_sts != connector->status) { + DRM_DEBUG_DRIVER("Re-queuing work_func due to possible change\n"); + queue_delayed_work(system_wq, &mhdp->hotplug_work, + usecs_to_jiffies(50)); + break; + } + retry--; + } while (retry > 0); + DRM_DEBUG_DRIVER("Finished %s\n", __func__); +} + +static irqreturn_t cdns_dp_irq_thread(int irq, void *data) +{ + struct cdns_mhdp_device *mhdp = data; + + disable_irq_nosync(irq); + + /* Need to handle the enable HERE */ + if (irq == mhdp->irq[IRQ_IN]) { + DRM_DEBUG_DRIVER("HDMI/DP IRQ IN\n"); + enable_irq(mhdp->irq[IRQ_OUT]); + } else if (irq == mhdp->irq[IRQ_OUT]) { + DRM_DEBUG_DRIVER("HDMI/DP IRQ OUT\n"); + enable_irq(mhdp->irq[IRQ_IN]); + } + + /* Queue job as long as not already in queue */ + queue_delayed_work(system_wq, &mhdp->hotplug_work, + usecs_to_jiffies(5)); + + return IRQ_HANDLED; +} + +static void cdns_dp_parse_dt(struct cdns_mhdp_device *mhdp) +{ + struct device_node *of_node = mhdp->dev->of_node; + int ret; + + ret = of_property_read_u32(of_node, "lane-mapping", + &mhdp->lane_mapping); + if (ret) { + mhdp->lane_mapping = 0xc6; + dev_warn(mhdp->dev, "Failed to get lane_mapping - using default 0xc6\n"); + } + dev_info(mhdp->dev, "lane-mapping 0x%02x\n", mhdp->lane_mapping); +} + +static int __cdns_dp_probe(struct platform_device *pdev, + struct cdns_mhdp_device *mhdp) +{ + struct device *dev = &pdev->dev; + struct resource *iores = NULL; + int ret; + + mutex_init(&mhdp->lock); + mutex_init(&mhdp->api_lock); + mutex_init(&mhdp->iolock); + + INIT_DELAYED_WORK(&mhdp->hotplug_work, hotplug_work_func); + + iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (iores) { + mhdp->regs_base = devm_ioremap(dev, iores->start, + resource_size(iores)); + if (IS_ERR(mhdp->regs_base)) + return -ENOMEM; + } + + iores = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (iores) { + mhdp->regs_sec = devm_ioremap(dev, iores->start, + resource_size(iores)); + if (IS_ERR(mhdp->regs_sec)) + return -ENOMEM; + } + + mhdp->is_hpd = true; + mhdp->is_dp = true; + mhdp->is_ls1028a = false; + + mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in"); + if (mhdp->irq[IRQ_IN] < 0) { + mhdp->is_hpd = false; + dev_info(dev, "No plug_in irq number\n"); + } + + mhdp->irq[IRQ_OUT] = platform_get_irq_byname(pdev, "plug_out"); + if (mhdp->irq[IRQ_OUT] < 0) { + mhdp->is_hpd = false; + dev_info(dev, "No plug_out irq number\n"); + } + + cdns_dp_parse_dt(mhdp); + + cnds_hdcp_create_device_files(mhdp); + + if (of_device_is_compatible(dev->of_node, "cdn,ls1028a-dp")) + mhdp->is_ls1028a = true; + + cdns_mhdp_plat_call(mhdp, power_on); + + cdns_mhdp_plat_call(mhdp, firmware_init); + + /* DP FW alive check */ + ret = cdns_mhdp_check_alive(mhdp); + if (ret == false) { + DRM_ERROR("NO dp FW running\n"); + return -ENXIO; + } + + ret = cdns_hdcp_init(mhdp, pdev->dev.of_node); + if (ret < 0) + DRM_WARN("Failed to initialize HDCP\n"); + + /* DP PHY init before AUX init */ + cdns_mhdp_plat_call(mhdp, phy_set); + + /* Enable Hotplug Detect IRQ thread */ + if (mhdp->is_hpd) { + irq_set_status_flags(mhdp->irq[IRQ_IN], IRQ_NOAUTOEN); + ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_IN], + NULL, cdns_dp_irq_thread, + IRQF_ONESHOT, dev_name(dev), + mhdp); + + if (ret) { + dev_err(dev, "can't claim irq %d\n", + mhdp->irq[IRQ_IN]); + return -EINVAL; + } + + irq_set_status_flags(mhdp->irq[IRQ_OUT], IRQ_NOAUTOEN); + ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_OUT], + NULL, cdns_dp_irq_thread, + IRQF_ONESHOT, dev_name(dev), + mhdp); + + if (ret) { + dev_err(dev, "can't claim irq %d\n", + mhdp->irq[IRQ_OUT]); + return -EINVAL; + } + + // Call to clear any latched values first... + cdns_mhdp_read_hpd(mhdp); + if (cdns_mhdp_read_hpd(mhdp)) + enable_irq(mhdp->irq[IRQ_OUT]); + else + enable_irq(mhdp->irq[IRQ_IN]); + } + + mhdp->bridge.base.driver_private = mhdp; + mhdp->bridge.base.funcs = &cdns_dp_bridge_funcs; +#ifdef CONFIG_OF + mhdp->bridge.base.of_node = dev->of_node; +#endif + + dev_set_drvdata(dev, mhdp); + + /* register audio driver */ + cdns_mhdp_register_audio_driver(dev); + + dp_aux_init(mhdp, dev); + + return 0; +} + +static void __cdns_dp_remove(struct cdns_mhdp_device *mhdp) +{ + dp_aux_destroy(mhdp); + cdns_mhdp_unregister_audio_driver(mhdp->dev); +} + +/* ----------------------------------------------------------------------------- + * Probe/remove API, used from platforms based on the DRM bridge API. + */ +int cdns_dp_probe(struct platform_device *pdev, + struct cdns_mhdp_device *mhdp) +{ + int ret; + + ret = __cdns_dp_probe(pdev, mhdp); + if (ret) + return ret; + + drm_bridge_add(&mhdp->bridge.base); + + return 0; +} +EXPORT_SYMBOL_GPL(cdns_dp_probe); + +void cdns_dp_remove(struct platform_device *pdev) +{ + struct cdns_mhdp_device *mhdp = platform_get_drvdata(pdev); + + drm_bridge_remove(&mhdp->bridge.base); + + __cdns_dp_remove(mhdp); +} +EXPORT_SYMBOL_GPL(cdns_dp_remove); + +/* ----------------------------------------------------------------------------- + * Bind/unbind API, used from platforms based on the component framework. + */ +int cdns_dp_bind(struct platform_device *pdev, struct drm_encoder *encoder, + struct cdns_mhdp_device *mhdp) +{ + int ret; + + ret = __cdns_dp_probe(pdev, mhdp); + if (ret < 0) + return ret; + + ret = drm_bridge_attach(encoder, &mhdp->bridge.base, NULL, 0); + if (ret) { + cdns_dp_remove(pdev); + DRM_ERROR("Failed to initialize bridge with drm\n"); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(cdns_dp_bind); + +void cdns_dp_unbind(struct device *dev) +{ + struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev); + + __cdns_dp_remove(mhdp); +} +EXPORT_SYMBOL_GPL(cdns_dp_unbind); + +MODULE_AUTHOR("Sandor Yu <sandor.yu@nxp.com>"); +MODULE_DESCRIPTION("Cadence Display Port transmitter driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:cdn-dp"); |