// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include "msm_drv.h" #include "msm_kms.h" #include "dp_ctrl.h" #include "dp_catalog.h" #include "dp_aux.h" #include "dp_reg.h" #include "dp_link.h" #include "dp_panel.h" #include "dp_display.h" #include "dp_drm.h" #include "dp_audio.h" #include "dp_debug.h" static bool psr_enabled = false; module_param(psr_enabled, bool, 0); MODULE_PARM_DESC(psr_enabled, "enable PSR for eDP and DP displays"); #define HPD_STRING_SIZE 30 enum { ISR_DISCONNECTED, ISR_CONNECT_PENDING, ISR_CONNECTED, ISR_HPD_REPLUG_COUNT, ISR_IRQ_HPD_PULSE_COUNT, ISR_HPD_LO_GLITH_COUNT, }; /* event thread connection state */ enum { ST_DISCONNECTED, ST_MAINLINK_READY, ST_CONNECTED, ST_DISCONNECT_PENDING, ST_DISPLAY_OFF, }; enum { EV_NO_EVENT, /* hpd events */ EV_HPD_PLUG_INT, EV_IRQ_HPD_INT, EV_HPD_UNPLUG_INT, EV_USER_NOTIFICATION, }; #define EVENT_TIMEOUT (HZ/10) /* 100ms */ #define DP_EVENT_Q_MAX 8 #define DP_TIMEOUT_NONE 0 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2) struct msm_dp_event { u32 event_id; u32 data; u32 delay; }; struct msm_dp_display_private { int irq; unsigned int id; /* state variables */ bool core_initialized; bool phy_initialized; bool audio_supported; struct drm_device *drm_dev; struct msm_dp_catalog *catalog; struct drm_dp_aux *aux; struct msm_dp_link *link; struct msm_dp_panel *panel; struct msm_dp_ctrl *ctrl; struct msm_dp_display_mode msm_dp_mode; struct msm_dp msm_dp_display; /* wait for audio signaling */ struct completion audio_comp; /* event related only access by event thread */ struct mutex event_mutex; wait_queue_head_t event_q; u32 hpd_state; u32 event_pndx; u32 event_gndx; struct task_struct *ev_tsk; struct msm_dp_event event_list[DP_EVENT_Q_MAX]; spinlock_t event_lock; bool wide_bus_supported; struct msm_dp_audio *audio; }; struct msm_dp_desc { phys_addr_t io_start; unsigned int id; bool wide_bus_supported; }; static const struct msm_dp_desc msm_dp_desc_sa8775p[] = { { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, { .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true }, { .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true }, { .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true }, {} }; static const struct msm_dp_desc msm_dp_desc_sc7180[] = { { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, {} }; static const struct msm_dp_desc msm_dp_desc_sc7280[] = { { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true }, {} }; static const struct msm_dp_desc msm_dp_desc_sc8180x[] = { { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true }, { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true }, {} }; static const struct msm_dp_desc msm_dp_desc_sc8280xp[] = { { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true }, { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true }, { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true }, { .io_start = 0x22090000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, { .io_start = 0x22098000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true }, { .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true }, { .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true }, {} }; static const struct msm_dp_desc msm_dp_desc_sm8650[] = { { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, {} }; static const struct msm_dp_desc msm_dp_desc_x1e80100[] = { { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, { .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true }, { .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true }, { .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true }, {} }; static const struct of_device_id msm_dp_dt_match[] = { { .compatible = "qcom,sa8775p-dp", .data = &msm_dp_desc_sa8775p }, { .compatible = "qcom,sc7180-dp", .data = &msm_dp_desc_sc7180 }, { .compatible = "qcom,sc7280-dp", .data = &msm_dp_desc_sc7280 }, { .compatible = "qcom,sc7280-edp", .data = &msm_dp_desc_sc7280 }, { .compatible = "qcom,sc8180x-dp", .data = &msm_dp_desc_sc8180x }, { .compatible = "qcom,sc8180x-edp", .data = &msm_dp_desc_sc8180x }, { .compatible = "qcom,sc8280xp-dp", .data = &msm_dp_desc_sc8280xp }, { .compatible = "qcom,sc8280xp-edp", .data = &msm_dp_desc_sc8280xp }, { .compatible = "qcom,sdm845-dp", .data = &msm_dp_desc_sc7180 }, { .compatible = "qcom,sm8350-dp", .data = &msm_dp_desc_sc7180 }, { .compatible = "qcom,sm8650-dp", .data = &msm_dp_desc_sm8650 }, { .compatible = "qcom,x1e80100-dp", .data = &msm_dp_desc_x1e80100 }, {} }; static struct msm_dp_display_private *dev_get_dp_display_private(struct device *dev) { struct msm_dp *dp = dev_get_drvdata(dev); return container_of(dp, struct msm_dp_display_private, msm_dp_display); } static int msm_dp_add_event(struct msm_dp_display_private *msm_dp_priv, u32 event, u32 data, u32 delay) { unsigned long flag; struct msm_dp_event *todo; int pndx; spin_lock_irqsave(&msm_dp_priv->event_lock, flag); pndx = msm_dp_priv->event_pndx + 1; pndx %= DP_EVENT_Q_MAX; if (pndx == msm_dp_priv->event_gndx) { pr_err("event_q is full: pndx=%d gndx=%d\n", msm_dp_priv->event_pndx, msm_dp_priv->event_gndx); spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag); return -EPERM; } todo = &msm_dp_priv->event_list[msm_dp_priv->event_pndx++]; msm_dp_priv->event_pndx %= DP_EVENT_Q_MAX; todo->event_id = event; todo->data = data; todo->delay = delay; wake_up(&msm_dp_priv->event_q); spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag); return 0; } static int msm_dp_del_event(struct msm_dp_display_private *msm_dp_priv, u32 event) { unsigned long flag; struct msm_dp_event *todo; u32 gndx; spin_lock_irqsave(&msm_dp_priv->event_lock, flag); if (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) { spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag); return -ENOENT; } gndx = msm_dp_priv->event_gndx; while (msm_dp_priv->event_pndx != gndx) { todo = &msm_dp_priv->event_list[gndx]; if (todo->event_id == event) { todo->event_id = EV_NO_EVENT; /* deleted */ todo->delay = 0; } gndx++; gndx %= DP_EVENT_Q_MAX; } spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag); return 0; } void msm_dp_display_signal_audio_start(struct msm_dp *msm_dp_display) { struct msm_dp_display_private *dp; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); reinit_completion(&dp->audio_comp); } void msm_dp_display_signal_audio_complete(struct msm_dp *msm_dp_display) { struct msm_dp_display_private *dp; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); complete_all(&dp->audio_comp); } static int msm_dp_hpd_event_thread_start(struct msm_dp_display_private *msm_dp_priv); static int msm_dp_display_bind(struct device *dev, struct device *master, void *data) { int rc = 0; struct msm_dp_display_private *dp = dev_get_dp_display_private(dev); struct msm_drm_private *priv = dev_get_drvdata(master); struct drm_device *drm = priv->dev; dp->msm_dp_display.drm_dev = drm; priv->dp[dp->id] = &dp->msm_dp_display; dp->drm_dev = drm; dp->aux->drm_dev = drm; rc = msm_dp_aux_register(dp->aux); if (rc) { DRM_ERROR("DRM DP AUX register failed\n"); goto end; } rc = msm_dp_register_audio_driver(dev, dp->audio); if (rc) { DRM_ERROR("Audio registration Dp failed\n"); goto end; } rc = msm_dp_hpd_event_thread_start(dp); if (rc) { DRM_ERROR("Event thread create failed\n"); goto end; } return 0; end: return rc; } static void msm_dp_display_unbind(struct device *dev, struct device *master, void *data) { struct msm_dp_display_private *dp = dev_get_dp_display_private(dev); struct msm_drm_private *priv = dev_get_drvdata(master); kthread_stop(dp->ev_tsk); of_dp_aux_depopulate_bus(dp->aux); msm_dp_unregister_audio_driver(dev, dp->audio); msm_dp_aux_unregister(dp->aux); dp->drm_dev = NULL; dp->aux->drm_dev = NULL; priv->dp[dp->id] = NULL; } static const struct component_ops msm_dp_display_comp_ops = { .bind = msm_dp_display_bind, .unbind = msm_dp_display_unbind, }; static void msm_dp_display_send_hpd_event(struct msm_dp *msm_dp_display) { struct msm_dp_display_private *dp; struct drm_connector *connector; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); connector = dp->msm_dp_display.connector; drm_helper_hpd_irq_event(connector->dev); } static int msm_dp_display_send_hpd_notification(struct msm_dp_display_private *dp, bool hpd) { if ((hpd && dp->msm_dp_display.link_ready) || (!hpd && !dp->msm_dp_display.link_ready)) { drm_dbg_dp(dp->drm_dev, "HPD already %s\n", (hpd ? "on" : "off")); return 0; } /* reset video pattern flag on disconnect */ if (!hpd) { dp->panel->video_test = false; if (!dp->msm_dp_display.is_edp) drm_dp_set_subconnector_property(dp->msm_dp_display.connector, connector_status_disconnected, dp->panel->dpcd, dp->panel->downstream_ports); } dp->msm_dp_display.link_ready = hpd; drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n", dp->msm_dp_display.connector_type, hpd); msm_dp_display_send_hpd_event(&dp->msm_dp_display); return 0; } static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) { struct drm_connector *connector = dp->msm_dp_display.connector; const struct drm_display_info *info = &connector->display_info; int rc = 0; rc = msm_dp_panel_read_sink_caps(dp->panel, connector); if (rc) goto end; msm_dp_link_process_request(dp->link); if (!dp->msm_dp_display.is_edp) drm_dp_set_subconnector_property(connector, connector_status_connected, dp->panel->dpcd, dp->panel->downstream_ports); dp->msm_dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled; dp->audio_supported = info->has_audio; msm_dp_panel_handle_sink_request(dp->panel); /* * set sink to normal operation mode -- D0 * before dpcd read */ msm_dp_link_psm_config(dp->link, &dp->panel->link_info, false); msm_dp_link_reset_phy_params_vx_px(dp->link); rc = msm_dp_ctrl_on_link(dp->ctrl); if (rc) { DRM_ERROR("failed to complete DP link training\n"); goto end; } msm_dp_add_event(dp, EV_USER_NOTIFICATION, true, 0); end: return rc; } static void msm_dp_display_host_phy_init(struct msm_dp_display_private *dp) { drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", dp->msm_dp_display.connector_type, dp->core_initialized, dp->phy_initialized); if (!dp->phy_initialized) { msm_dp_ctrl_phy_init(dp->ctrl); dp->phy_initialized = true; } } static void msm_dp_display_host_phy_exit(struct msm_dp_display_private *dp) { drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", dp->msm_dp_display.connector_type, dp->core_initialized, dp->phy_initialized); if (dp->phy_initialized) { msm_dp_ctrl_phy_exit(dp->ctrl); dp->phy_initialized = false; } } static void msm_dp_display_host_init(struct msm_dp_display_private *dp) { drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", dp->msm_dp_display.connector_type, dp->core_initialized, dp->phy_initialized); msm_dp_ctrl_core_clk_enable(dp->ctrl); msm_dp_ctrl_reset_irq_ctrl(dp->ctrl, true); msm_dp_aux_init(dp->aux); dp->core_initialized = true; } static void msm_dp_display_host_deinit(struct msm_dp_display_private *dp) { drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", dp->msm_dp_display.connector_type, dp->core_initialized, dp->phy_initialized); msm_dp_ctrl_reset_irq_ctrl(dp->ctrl, false); msm_dp_aux_deinit(dp->aux); msm_dp_ctrl_core_clk_disable(dp->ctrl); dp->core_initialized = false; } static int msm_dp_display_usbpd_configure_cb(struct device *dev) { struct msm_dp_display_private *dp = dev_get_dp_display_private(dev); msm_dp_display_host_phy_init(dp); return msm_dp_display_process_hpd_high(dp); } static int msm_dp_display_notify_disconnect(struct device *dev) { struct msm_dp_display_private *dp = dev_get_dp_display_private(dev); msm_dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); return 0; } static void msm_dp_display_handle_video_request(struct msm_dp_display_private *dp) { if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) { dp->panel->video_test = true; msm_dp_link_send_test_response(dp->link); } } static int msm_dp_display_handle_port_status_changed(struct msm_dp_display_private *dp) { int rc = 0; if (drm_dp_is_branch(dp->panel->dpcd) && dp->link->sink_count == 0) { drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n"); if (dp->hpd_state != ST_DISCONNECTED) { dp->hpd_state = ST_DISCONNECT_PENDING; msm_dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); } } else { if (dp->hpd_state == ST_DISCONNECTED) { dp->hpd_state = ST_MAINLINK_READY; rc = msm_dp_display_process_hpd_high(dp); if (rc) dp->hpd_state = ST_DISCONNECTED; } } return rc; } static int msm_dp_display_handle_irq_hpd(struct msm_dp_display_private *dp) { u32 sink_request = dp->link->sink_request; drm_dbg_dp(dp->drm_dev, "%d\n", sink_request); if (dp->hpd_state == ST_DISCONNECTED) { if (sink_request & DP_LINK_STATUS_UPDATED) { drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n", sink_request); DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n"); return -EINVAL; } } msm_dp_ctrl_handle_sink_request(dp->ctrl); if (sink_request & DP_TEST_LINK_VIDEO_PATTERN) msm_dp_display_handle_video_request(dp); return 0; } static int msm_dp_display_usbpd_attention_cb(struct device *dev) { int rc = 0; u32 sink_request; struct msm_dp_display_private *dp = dev_get_dp_display_private(dev); /* check for any test request issued by sink */ rc = msm_dp_link_process_request(dp->link); if (!rc) { sink_request = dp->link->sink_request; drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n", dp->hpd_state, sink_request); if (sink_request & DS_PORT_STATUS_CHANGED) rc = msm_dp_display_handle_port_status_changed(dp); else rc = msm_dp_display_handle_irq_hpd(dp); } return rc; } static int msm_dp_hpd_plug_handle(struct msm_dp_display_private *dp, u32 data) { u32 state; int ret; struct platform_device *pdev = dp->msm_dp_display.pdev; msm_dp_aux_enable_xfers(dp->aux, true); mutex_lock(&dp->event_mutex); state = dp->hpd_state; drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n", dp->msm_dp_display.connector_type, state); if (state == ST_DISPLAY_OFF) { mutex_unlock(&dp->event_mutex); return 0; } if (state == ST_MAINLINK_READY || state == ST_CONNECTED) { mutex_unlock(&dp->event_mutex); return 0; } if (state == ST_DISCONNECT_PENDING) { /* wait until ST_DISCONNECTED */ msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */ mutex_unlock(&dp->event_mutex); return 0; } ret = pm_runtime_resume_and_get(&pdev->dev); if (ret) { DRM_ERROR("failed to pm_runtime_resume\n"); mutex_unlock(&dp->event_mutex); return ret; } ret = msm_dp_display_usbpd_configure_cb(&pdev->dev); if (ret) { /* link train failed */ dp->hpd_state = ST_DISCONNECTED; pm_runtime_put_sync(&pdev->dev); } else { dp->hpd_state = ST_MAINLINK_READY; } drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", dp->msm_dp_display.connector_type, state); mutex_unlock(&dp->event_mutex); /* uevent will complete connection part */ return 0; }; static void msm_dp_display_handle_plugged_change(struct msm_dp *msm_dp_display, bool plugged) { struct msm_dp_display_private *dp; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); /* notify audio subsystem only if sink supports audio */ if (msm_dp_display->plugged_cb && msm_dp_display->codec_dev && dp->audio_supported) msm_dp_display->plugged_cb(msm_dp_display->codec_dev, plugged); } static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp, u32 data) { u32 state; struct platform_device *pdev = dp->msm_dp_display.pdev; msm_dp_aux_enable_xfers(dp->aux, false); mutex_lock(&dp->event_mutex); state = dp->hpd_state; drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n", dp->msm_dp_display.connector_type, state); /* unplugged, no more irq_hpd handle */ msm_dp_del_event(dp, EV_IRQ_HPD_INT); if (state == ST_DISCONNECTED) { /* triggered by irq_hdp with sink_count = 0 */ if (dp->link->sink_count == 0) { msm_dp_display_host_phy_exit(dp); } msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev); mutex_unlock(&dp->event_mutex); return 0; } else if (state == ST_DISCONNECT_PENDING) { mutex_unlock(&dp->event_mutex); return 0; } else if (state == ST_MAINLINK_READY) { msm_dp_ctrl_off_link(dp->ctrl); msm_dp_display_host_phy_exit(dp); dp->hpd_state = ST_DISCONNECTED; msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev); pm_runtime_put_sync(&pdev->dev); mutex_unlock(&dp->event_mutex); return 0; } /* * We don't need separate work for disconnect as * connect/attention interrupts are disabled */ msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev); if (state == ST_DISPLAY_OFF) { dp->hpd_state = ST_DISCONNECTED; } else { dp->hpd_state = ST_DISCONNECT_PENDING; } /* signal the disconnect event early to ensure proper teardown */ msm_dp_display_handle_plugged_change(&dp->msm_dp_display, false); drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", dp->msm_dp_display.connector_type, state); /* uevent will complete disconnection part */ pm_runtime_put_sync(&pdev->dev); mutex_unlock(&dp->event_mutex); return 0; } static int msm_dp_irq_hpd_handle(struct msm_dp_display_private *dp, u32 data) { u32 state; mutex_lock(&dp->event_mutex); /* irq_hpd can happen at either connected or disconnected state */ state = dp->hpd_state; drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n", dp->msm_dp_display.connector_type, state); if (state == ST_DISPLAY_OFF) { mutex_unlock(&dp->event_mutex); return 0; } if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) { /* wait until ST_CONNECTED */ msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */ mutex_unlock(&dp->event_mutex); return 0; } msm_dp_display_usbpd_attention_cb(&dp->msm_dp_display.pdev->dev); drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", dp->msm_dp_display.connector_type, state); mutex_unlock(&dp->event_mutex); return 0; } static void msm_dp_display_deinit_sub_modules(struct msm_dp_display_private *dp) { msm_dp_audio_put(dp->audio); msm_dp_panel_put(dp->panel); msm_dp_aux_put(dp->aux); } static int msm_dp_init_sub_modules(struct msm_dp_display_private *dp) { int rc = 0; struct device *dev = &dp->msm_dp_display.pdev->dev; struct msm_dp_panel_in panel_in = { .dev = dev, }; struct phy *phy; phy = devm_phy_get(dev, "dp"); if (IS_ERR(phy)) return PTR_ERR(phy); rc = phy_set_mode_ext(phy, PHY_MODE_DP, dp->msm_dp_display.is_edp ? PHY_SUBMODE_EDP : PHY_SUBMODE_DP); if (rc) { DRM_ERROR("failed to set phy submode, rc = %d\n", rc); dp->catalog = NULL; goto error; } dp->catalog = msm_dp_catalog_get(dev); if (IS_ERR(dp->catalog)) { rc = PTR_ERR(dp->catalog); DRM_ERROR("failed to initialize catalog, rc = %d\n", rc); dp->catalog = NULL; goto error; } dp->aux = msm_dp_aux_get(dev, dp->catalog, phy, dp->msm_dp_display.is_edp); if (IS_ERR(dp->aux)) { rc = PTR_ERR(dp->aux); DRM_ERROR("failed to initialize aux, rc = %d\n", rc); dp->aux = NULL; goto error; } dp->link = msm_dp_link_get(dev, dp->aux); if (IS_ERR(dp->link)) { rc = PTR_ERR(dp->link); DRM_ERROR("failed to initialize link, rc = %d\n", rc); dp->link = NULL; goto error_link; } panel_in.aux = dp->aux; panel_in.catalog = dp->catalog; panel_in.link = dp->link; dp->panel = msm_dp_panel_get(&panel_in); if (IS_ERR(dp->panel)) { rc = PTR_ERR(dp->panel); DRM_ERROR("failed to initialize panel, rc = %d\n", rc); dp->panel = NULL; goto error_link; } dp->ctrl = msm_dp_ctrl_get(dev, dp->link, dp->panel, dp->aux, dp->catalog, phy); if (IS_ERR(dp->ctrl)) { rc = PTR_ERR(dp->ctrl); DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc); dp->ctrl = NULL; goto error_ctrl; } dp->audio = msm_dp_audio_get(dp->msm_dp_display.pdev, dp->panel, dp->catalog); if (IS_ERR(dp->audio)) { rc = PTR_ERR(dp->audio); pr_err("failed to initialize audio, rc = %d\n", rc); dp->audio = NULL; goto error_ctrl; } return rc; error_ctrl: msm_dp_panel_put(dp->panel); error_link: msm_dp_aux_put(dp->aux); error: return rc; } static int msm_dp_display_set_mode(struct msm_dp *msm_dp_display, struct msm_dp_display_mode *mode) { struct msm_dp_display_private *dp; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); drm_mode_copy(&dp->panel->msm_dp_mode.drm_mode, &mode->drm_mode); dp->panel->msm_dp_mode.bpp = mode->bpp; dp->panel->msm_dp_mode.out_fmt_is_yuv_420 = mode->out_fmt_is_yuv_420; msm_dp_panel_init_panel_info(dp->panel); return 0; } static int msm_dp_display_enable(struct msm_dp_display_private *dp, bool force_link_train) { int rc = 0; struct msm_dp *msm_dp_display = &dp->msm_dp_display; drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count); if (msm_dp_display->power_on) { drm_dbg_dp(dp->drm_dev, "Link already setup, return\n"); return 0; } rc = msm_dp_ctrl_on_stream(dp->ctrl, force_link_train); if (!rc) msm_dp_display->power_on = true; return rc; } static int msm_dp_display_post_enable(struct msm_dp *msm_dp_display) { struct msm_dp_display_private *dp; u32 rate; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); rate = dp->link->link_params.rate; if (dp->audio_supported) { dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate); dp->audio->lane_count = dp->link->link_params.num_lanes; } /* signal the connect event late to synchronize video and display */ msm_dp_display_handle_plugged_change(msm_dp_display, true); if (msm_dp_display->psr_supported) msm_dp_ctrl_config_psr(dp->ctrl); return 0; } static int msm_dp_display_disable(struct msm_dp_display_private *dp) { struct msm_dp *msm_dp_display = &dp->msm_dp_display; if (!msm_dp_display->power_on) return 0; /* wait only if audio was enabled */ if (msm_dp_display->audio_enabled) { /* signal the disconnect event */ msm_dp_display_handle_plugged_change(msm_dp_display, false); if (!wait_for_completion_timeout(&dp->audio_comp, HZ * 5)) DRM_ERROR("audio comp timeout\n"); } msm_dp_display->audio_enabled = false; if (dp->link->sink_count == 0) { /* * irq_hpd with sink_count = 0 * hdmi unplugged out of dongle */ msm_dp_ctrl_off_link_stream(dp->ctrl); } else { /* * unplugged interrupt * dongle unplugged out of DUT */ msm_dp_ctrl_off(dp->ctrl); msm_dp_display_host_phy_exit(dp); } msm_dp_display->power_on = false; drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count); return 0; } int msm_dp_display_set_plugged_cb(struct msm_dp *msm_dp_display, hdmi_codec_plugged_cb fn, struct device *codec_dev) { bool plugged; msm_dp_display->plugged_cb = fn; msm_dp_display->codec_dev = codec_dev; plugged = msm_dp_display->link_ready; msm_dp_display_handle_plugged_change(msm_dp_display, plugged); return 0; } /** * msm_dp_bridge_mode_valid - callback to determine if specified mode is valid * @bridge: Pointer to drm bridge structure * @info: display info * @mode: Pointer to drm mode structure * Returns: Validity status for specified mode */ enum drm_mode_status msm_dp_bridge_mode_valid(struct drm_bridge *bridge, const struct drm_display_info *info, const struct drm_display_mode *mode) { const u32 num_components = 3, default_bpp = 24; struct msm_dp_display_private *msm_dp_display; struct msm_dp_link_info *link_info; u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0; struct msm_dp *dp; int mode_pclk_khz = mode->clock; dp = to_dp_bridge(bridge)->msm_dp_display; if (!dp || !mode_pclk_khz || !dp->connector) { DRM_ERROR("invalid params\n"); return -EINVAL; } if (mode->clock > DP_MAX_PIXEL_CLK_KHZ) return MODE_CLOCK_HIGH; msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); link_info = &msm_dp_display->panel->link_info; if (drm_mode_is_420_only(&dp->connector->display_info, mode) && msm_dp_display->panel->vsc_sdp_supported) mode_pclk_khz /= 2; mode_bpp = dp->connector->display_info.bpc * num_components; if (!mode_bpp) mode_bpp = default_bpp; mode_bpp = msm_dp_panel_get_mode_bpp(msm_dp_display->panel, mode_bpp, mode_pclk_khz); mode_rate_khz = mode_pclk_khz * mode_bpp; supported_rate_khz = link_info->num_lanes * link_info->rate * 8; if (mode_rate_khz > supported_rate_khz) return MODE_BAD; return MODE_OK; } int msm_dp_display_get_modes(struct msm_dp *dp) { struct msm_dp_display_private *msm_dp_display; if (!dp) { DRM_ERROR("invalid params\n"); return 0; } msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); return msm_dp_panel_get_modes(msm_dp_display->panel, dp->connector); } bool msm_dp_display_check_video_test(struct msm_dp *dp) { struct msm_dp_display_private *msm_dp_display; msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); return msm_dp_display->panel->video_test; } int msm_dp_display_get_test_bpp(struct msm_dp *dp) { struct msm_dp_display_private *msm_dp_display; if (!dp) { DRM_ERROR("invalid params\n"); return 0; } msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); return msm_dp_link_bit_depth_to_bpp( msm_dp_display->link->test_video.test_bit_depth); } void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp) { struct msm_dp_display_private *msm_dp_display; msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); /* * if we are reading registers we need the link clocks to be on * however till DP cable is connected this will not happen as we * do not know the resolution to power up with. Hence check the * power_on status before dumping DP registers to avoid crash due * to unclocked access */ mutex_lock(&msm_dp_display->event_mutex); if (!dp->power_on) { mutex_unlock(&msm_dp_display->event_mutex); return; } msm_dp_catalog_snapshot(msm_dp_display->catalog, disp_state); mutex_unlock(&msm_dp_display->event_mutex); } void msm_dp_display_set_psr(struct msm_dp *msm_dp_display, bool enter) { struct msm_dp_display_private *dp; if (!msm_dp_display) { DRM_ERROR("invalid params\n"); return; } dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); msm_dp_ctrl_set_psr(dp->ctrl, enter); } static int hpd_event_thread(void *data) { struct msm_dp_display_private *msm_dp_priv; unsigned long flag; struct msm_dp_event *todo; int timeout_mode = 0; msm_dp_priv = (struct msm_dp_display_private *)data; while (1) { if (timeout_mode) { wait_event_timeout(msm_dp_priv->event_q, (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) || kthread_should_stop(), EVENT_TIMEOUT); } else { wait_event_interruptible(msm_dp_priv->event_q, (msm_dp_priv->event_pndx != msm_dp_priv->event_gndx) || kthread_should_stop()); } if (kthread_should_stop()) break; spin_lock_irqsave(&msm_dp_priv->event_lock, flag); todo = &msm_dp_priv->event_list[msm_dp_priv->event_gndx]; if (todo->delay) { struct msm_dp_event *todo_next; msm_dp_priv->event_gndx++; msm_dp_priv->event_gndx %= DP_EVENT_Q_MAX; /* re enter delay event into q */ todo_next = &msm_dp_priv->event_list[msm_dp_priv->event_pndx++]; msm_dp_priv->event_pndx %= DP_EVENT_Q_MAX; todo_next->event_id = todo->event_id; todo_next->data = todo->data; todo_next->delay = todo->delay - 1; /* clean up older event */ todo->event_id = EV_NO_EVENT; todo->delay = 0; /* switch to timeout mode */ timeout_mode = 1; spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag); continue; } /* timeout with no events in q */ if (msm_dp_priv->event_pndx == msm_dp_priv->event_gndx) { spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag); continue; } msm_dp_priv->event_gndx++; msm_dp_priv->event_gndx %= DP_EVENT_Q_MAX; timeout_mode = 0; spin_unlock_irqrestore(&msm_dp_priv->event_lock, flag); switch (todo->event_id) { case EV_HPD_PLUG_INT: msm_dp_hpd_plug_handle(msm_dp_priv, todo->data); break; case EV_HPD_UNPLUG_INT: msm_dp_hpd_unplug_handle(msm_dp_priv, todo->data); break; case EV_IRQ_HPD_INT: msm_dp_irq_hpd_handle(msm_dp_priv, todo->data); break; case EV_USER_NOTIFICATION: msm_dp_display_send_hpd_notification(msm_dp_priv, todo->data); break; default: break; } } return 0; } static int msm_dp_hpd_event_thread_start(struct msm_dp_display_private *msm_dp_priv) { /* set event q to empty */ msm_dp_priv->event_gndx = 0; msm_dp_priv->event_pndx = 0; msm_dp_priv->ev_tsk = kthread_run(hpd_event_thread, msm_dp_priv, "dp_hpd_handler"); if (IS_ERR(msm_dp_priv->ev_tsk)) return PTR_ERR(msm_dp_priv->ev_tsk); return 0; } static irqreturn_t msm_dp_display_irq_handler(int irq, void *dev_id) { struct msm_dp_display_private *dp = dev_id; irqreturn_t ret = IRQ_NONE; u32 hpd_isr_status; if (!dp) { DRM_ERROR("invalid data\n"); return IRQ_NONE; } hpd_isr_status = msm_dp_catalog_hpd_get_intr_status(dp->catalog); if (hpd_isr_status & 0x0F) { drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n", dp->msm_dp_display.connector_type, hpd_isr_status); /* hpd related interrupts */ if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK) msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0); if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) { msm_dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0); } if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) { msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0); msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3); } if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK) msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0); ret = IRQ_HANDLED; } /* DP controller isr */ ret |= msm_dp_ctrl_isr(dp->ctrl); /* DP aux isr */ ret |= msm_dp_aux_isr(dp->aux); return ret; } static int msm_dp_display_request_irq(struct msm_dp_display_private *dp) { int rc = 0; struct platform_device *pdev = dp->msm_dp_display.pdev; dp->irq = platform_get_irq(pdev, 0); if (dp->irq < 0) { DRM_ERROR("failed to get irq\n"); return dp->irq; } rc = devm_request_irq(&pdev->dev, dp->irq, msm_dp_display_irq_handler, IRQF_TRIGGER_HIGH|IRQF_NO_AUTOEN, "dp_display_isr", dp); if (rc < 0) { DRM_ERROR("failed to request IRQ%u: %d\n", dp->irq, rc); return rc; } return 0; } static const struct msm_dp_desc *msm_dp_display_get_desc(struct platform_device *pdev) { const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev); struct resource *res; int i; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return NULL; for (i = 0; i < descs[i].io_start; i++) { if (descs[i].io_start == res->start) return &descs[i]; } dev_err(&pdev->dev, "unknown displayport instance\n"); return NULL; } static int msm_dp_display_probe_tail(struct device *dev) { struct msm_dp *dp = dev_get_drvdata(dev); int ret; /* * External bridges are mandatory for eDP interfaces: one has to * provide at least an eDP panel (which gets wrapped into panel-bridge). * * For DisplayPort interfaces external bridges are optional, so * silently ignore an error if one is not present (-ENODEV). */ dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0); if (IS_ERR(dp->next_bridge)) { ret = PTR_ERR(dp->next_bridge); dp->next_bridge = NULL; if (dp->is_edp || ret != -ENODEV) return ret; } ret = component_add(dev, &msm_dp_display_comp_ops); if (ret) DRM_ERROR("component add failed, rc=%d\n", ret); return ret; } static int msm_dp_auxbus_done_probe(struct drm_dp_aux *aux) { return msm_dp_display_probe_tail(aux->dev); } static int msm_dp_display_get_connector_type(struct platform_device *pdev, const struct msm_dp_desc *desc) { struct device_node *node = pdev->dev.of_node; struct device_node *aux_bus = of_get_child_by_name(node, "aux-bus"); struct device_node *panel = of_get_child_by_name(aux_bus, "panel"); int connector_type; if (panel) connector_type = DRM_MODE_CONNECTOR_eDP; else connector_type = DRM_MODE_SUBCONNECTOR_DisplayPort; of_node_put(panel); of_node_put(aux_bus); return connector_type; } static int msm_dp_display_probe(struct platform_device *pdev) { int rc = 0; struct msm_dp_display_private *dp; const struct msm_dp_desc *desc; if (!pdev || !pdev->dev.of_node) { DRM_ERROR("pdev not found\n"); return -ENODEV; } dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL); if (!dp) return -ENOMEM; desc = msm_dp_display_get_desc(pdev); if (!desc) return -EINVAL; dp->msm_dp_display.pdev = pdev; dp->id = desc->id; dp->msm_dp_display.connector_type = msm_dp_display_get_connector_type(pdev, desc); dp->wide_bus_supported = desc->wide_bus_supported; dp->msm_dp_display.is_edp = (dp->msm_dp_display.connector_type == DRM_MODE_CONNECTOR_eDP); rc = msm_dp_init_sub_modules(dp); if (rc) { DRM_ERROR("init sub module failed\n"); return -EPROBE_DEFER; } /* setup event q */ mutex_init(&dp->event_mutex); init_waitqueue_head(&dp->event_q); spin_lock_init(&dp->event_lock); /* Store DP audio handle inside DP display */ dp->msm_dp_display.msm_dp_audio = dp->audio; init_completion(&dp->audio_comp); platform_set_drvdata(pdev, &dp->msm_dp_display); rc = devm_pm_runtime_enable(&pdev->dev); if (rc) goto err; rc = msm_dp_display_request_irq(dp); if (rc) goto err; if (dp->msm_dp_display.is_edp) { rc = devm_of_dp_aux_populate_bus(dp->aux, msm_dp_auxbus_done_probe); if (rc) { DRM_ERROR("eDP auxbus population failed, rc=%d\n", rc); goto err; } } else { rc = msm_dp_display_probe_tail(&pdev->dev); if (rc) goto err; } return rc; err: msm_dp_display_deinit_sub_modules(dp); return rc; } static void msm_dp_display_remove(struct platform_device *pdev) { struct msm_dp_display_private *dp = dev_get_dp_display_private(&pdev->dev); component_del(&pdev->dev, &msm_dp_display_comp_ops); msm_dp_display_deinit_sub_modules(dp); platform_set_drvdata(pdev, NULL); } static int msm_dp_pm_runtime_suspend(struct device *dev) { struct msm_dp_display_private *dp = dev_get_dp_display_private(dev); disable_irq(dp->irq); if (dp->msm_dp_display.is_edp) { msm_dp_display_host_phy_exit(dp); msm_dp_catalog_ctrl_hpd_disable(dp->catalog); } msm_dp_display_host_deinit(dp); return 0; } static int msm_dp_pm_runtime_resume(struct device *dev) { struct msm_dp_display_private *dp = dev_get_dp_display_private(dev); /* * for eDP, host cotroller, HPD block and PHY are enabled here * but with HPD irq disabled * * for DP, only host controller is enabled here. * HPD block is enabled at msm_dp_bridge_hpd_enable() * PHY will be enabled at plugin handler later */ msm_dp_display_host_init(dp); if (dp->msm_dp_display.is_edp) { msm_dp_catalog_ctrl_hpd_enable(dp->catalog); msm_dp_display_host_phy_init(dp); } enable_irq(dp->irq); return 0; } static const struct dev_pm_ops msm_dp_pm_ops = { SET_RUNTIME_PM_OPS(msm_dp_pm_runtime_suspend, msm_dp_pm_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) }; static struct platform_driver msm_dp_display_driver = { .probe = msm_dp_display_probe, .remove = msm_dp_display_remove, .driver = { .name = "msm-dp-display", .of_match_table = msm_dp_dt_match, .suppress_bind_attrs = true, .pm = &msm_dp_pm_ops, }, }; int __init msm_dp_register(void) { int ret; ret = platform_driver_register(&msm_dp_display_driver); if (ret) DRM_ERROR("Dp display driver register failed"); return ret; } void __exit msm_dp_unregister(void) { platform_driver_unregister(&msm_dp_display_driver); } bool msm_dp_is_yuv_420_enabled(const struct msm_dp *msm_dp_display, const struct drm_display_mode *mode) { struct msm_dp_display_private *dp; const struct drm_display_info *info; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); info = &msm_dp_display->connector->display_info; return dp->panel->vsc_sdp_supported && drm_mode_is_420_only(info, mode); } bool msm_dp_needs_periph_flush(const struct msm_dp *msm_dp_display, const struct drm_display_mode *mode) { return msm_dp_is_yuv_420_enabled(msm_dp_display, mode); } bool msm_dp_wide_bus_available(const struct msm_dp *msm_dp_display) { struct msm_dp_display_private *dp; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); if (dp->msm_dp_mode.out_fmt_is_yuv_420) return false; return dp->wide_bus_supported; } void msm_dp_display_debugfs_init(struct msm_dp *msm_dp_display, struct dentry *root, bool is_edp) { struct msm_dp_display_private *dp; struct device *dev; int rc; dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); dev = &dp->msm_dp_display.pdev->dev; rc = msm_dp_debug_init(dev, dp->panel, dp->link, dp->msm_dp_display.connector, root, is_edp); if (rc) DRM_ERROR("failed to initialize debug, rc = %d\n", rc); } int msm_dp_modeset_init(struct msm_dp *msm_dp_display, struct drm_device *dev, struct drm_encoder *encoder, bool yuv_supported) { struct msm_dp_display_private *msm_dp_priv; int ret; msm_dp_display->drm_dev = dev; msm_dp_priv = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); ret = msm_dp_bridge_init(msm_dp_display, dev, encoder, yuv_supported); if (ret) { DRM_DEV_ERROR(dev->dev, "failed to create dp bridge: %d\n", ret); return ret; } msm_dp_display->connector = msm_dp_drm_connector_init(msm_dp_display, encoder); if (IS_ERR(msm_dp_display->connector)) { ret = PTR_ERR(msm_dp_display->connector); DRM_DEV_ERROR(dev->dev, "failed to create dp connector: %d\n", ret); msm_dp_display->connector = NULL; return ret; } msm_dp_priv->panel->connector = msm_dp_display->connector; return 0; } void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge, struct drm_bridge_state *old_bridge_state) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge); struct msm_dp *dp = msm_dp_bridge->msm_dp_display; int rc = 0; struct msm_dp_display_private *msm_dp_display; u32 state; bool force_link_train = false; msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); if (!msm_dp_display->msm_dp_mode.drm_mode.clock) { DRM_ERROR("invalid params\n"); return; } if (dp->is_edp) msm_dp_hpd_plug_handle(msm_dp_display, 0); mutex_lock(&msm_dp_display->event_mutex); if (pm_runtime_resume_and_get(&dp->pdev->dev)) { DRM_ERROR("failed to pm_runtime_resume\n"); mutex_unlock(&msm_dp_display->event_mutex); return; } state = msm_dp_display->hpd_state; if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) { mutex_unlock(&msm_dp_display->event_mutex); return; } rc = msm_dp_display_set_mode(dp, &msm_dp_display->msm_dp_mode); if (rc) { DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc); mutex_unlock(&msm_dp_display->event_mutex); return; } state = msm_dp_display->hpd_state; if (state == ST_DISPLAY_OFF) { msm_dp_display_host_phy_init(msm_dp_display); force_link_train = true; } msm_dp_display_enable(msm_dp_display, force_link_train); rc = msm_dp_display_post_enable(dp); if (rc) { DRM_ERROR("DP display post enable failed, rc=%d\n", rc); msm_dp_display_disable(msm_dp_display); } /* completed connection */ msm_dp_display->hpd_state = ST_CONNECTED; drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type); mutex_unlock(&msm_dp_display->event_mutex); } void msm_dp_bridge_atomic_disable(struct drm_bridge *drm_bridge, struct drm_bridge_state *old_bridge_state) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge); struct msm_dp *dp = msm_dp_bridge->msm_dp_display; struct msm_dp_display_private *msm_dp_display; msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); msm_dp_ctrl_push_idle(msm_dp_display->ctrl); } void msm_dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge, struct drm_bridge_state *old_bridge_state) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge); struct msm_dp *dp = msm_dp_bridge->msm_dp_display; u32 state; struct msm_dp_display_private *msm_dp_display; msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); if (dp->is_edp) msm_dp_hpd_unplug_handle(msm_dp_display, 0); mutex_lock(&msm_dp_display->event_mutex); state = msm_dp_display->hpd_state; if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED) drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n", dp->connector_type, state); msm_dp_display_disable(msm_dp_display); state = msm_dp_display->hpd_state; if (state == ST_DISCONNECT_PENDING) { /* completed disconnection */ msm_dp_display->hpd_state = ST_DISCONNECTED; } else { msm_dp_display->hpd_state = ST_DISPLAY_OFF; } drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type); pm_runtime_put_sync(&dp->pdev->dev); mutex_unlock(&msm_dp_display->event_mutex); } void msm_dp_bridge_mode_set(struct drm_bridge *drm_bridge, const struct drm_display_mode *mode, const struct drm_display_mode *adjusted_mode) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge); struct msm_dp *dp = msm_dp_bridge->msm_dp_display; struct msm_dp_display_private *msm_dp_display; struct msm_dp_panel *msm_dp_panel; msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); msm_dp_panel = msm_dp_display->panel; memset(&msm_dp_display->msm_dp_mode, 0x0, sizeof(struct msm_dp_display_mode)); if (msm_dp_display_check_video_test(dp)) msm_dp_display->msm_dp_mode.bpp = msm_dp_display_get_test_bpp(dp); else /* Default num_components per pixel = 3 */ msm_dp_display->msm_dp_mode.bpp = dp->connector->display_info.bpc * 3; if (!msm_dp_display->msm_dp_mode.bpp) msm_dp_display->msm_dp_mode.bpp = 24; /* Default bpp */ drm_mode_copy(&msm_dp_display->msm_dp_mode.drm_mode, adjusted_mode); msm_dp_display->msm_dp_mode.v_active_low = !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC); msm_dp_display->msm_dp_mode.h_active_low = !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC); msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 = drm_mode_is_420_only(&dp->connector->display_info, adjusted_mode) && msm_dp_panel->vsc_sdp_supported; /* populate wide_bus_support to different layers */ msm_dp_display->ctrl->wide_bus_en = msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported; msm_dp_display->catalog->wide_bus_en = msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported; } void msm_dp_bridge_hpd_enable(struct drm_bridge *bridge) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge); struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display; struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); /* * this is for external DP with hpd irq enabled case, * step-1: msm_dp_pm_runtime_resume() enable dp host only * step-2: enable hdp block and have hpd irq enabled here * step-3: waiting for plugin irq while phy is not initialized * step-4: DP PHY is initialized at plugin handler before link training * */ mutex_lock(&dp->event_mutex); if (pm_runtime_resume_and_get(&msm_dp_display->pdev->dev)) { DRM_ERROR("failed to resume power\n"); mutex_unlock(&dp->event_mutex); return; } msm_dp_catalog_ctrl_hpd_enable(dp->catalog); /* enable HDP interrupts */ msm_dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true); msm_dp_display->internal_hpd = true; mutex_unlock(&dp->event_mutex); } void msm_dp_bridge_hpd_disable(struct drm_bridge *bridge) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge); struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display; struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); mutex_lock(&dp->event_mutex); /* disable HDP interrupts */ msm_dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false); msm_dp_catalog_ctrl_hpd_disable(dp->catalog); msm_dp_display->internal_hpd = false; pm_runtime_put_sync(&msm_dp_display->pdev->dev); mutex_unlock(&dp->event_mutex); } void msm_dp_bridge_hpd_notify(struct drm_bridge *bridge, enum drm_connector_status status) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(bridge); struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display; struct msm_dp_display_private *dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); /* Without next_bridge interrupts are handled by the DP core directly */ if (msm_dp_display->internal_hpd) return; if (!msm_dp_display->link_ready && status == connector_status_connected) msm_dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0); else if (msm_dp_display->link_ready && status == connector_status_disconnected) msm_dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0); }