diff options
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_display.c')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_display.c | 1800 |
1 files changed, 1800 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c new file mode 100644 index 000000000000..9bd9cd5c1e03 --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -0,0 +1,1800 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/debugfs.h> +#include <linux/component.h> +#include <linux/of_irq.h> +#include <linux/phy/phy.h> +#include <linux/delay.h> +#include <linux/string_choices.h> +#include <drm/display/drm_dp_aux_bus.h> +#include <drm/display/drm_hdmi_audio_helper.h> +#include <drm/drm_edid.h> + +#include "msm_drv.h" +#include "msm_kms.h" +#include "dp_ctrl.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 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; + + void __iomem *ahb_base; + size_t ahb_len; + + void __iomem *aux_base; + size_t aux_len; + + void __iomem *link_base; + size_t link_len; + + void __iomem *p0_base; + size_t p0_len; +}; + +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_glymur[] = { + { .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 = 0x0af64000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true }, + { .io_start = 0x0af6c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true }, + {} +}; + +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_sdm845[] = { + { .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0 }, + {} +}; + +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,glymur-dp", .data = &msm_dp_desc_glymur }, + { .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_sdm845 }, + { .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->kms->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_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_aux_unregister(dp->aux); + dp->drm_dev = NULL; + dp->aux->drm_dev = NULL; + priv->kms->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", str_on_off(hpd)); + 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_lttpr_init(struct msm_dp_display_private *dp, u8 *dpcd) +{ + int rc, lttpr_count; + + if (drm_dp_read_lttpr_common_caps(dp->aux, dpcd, dp->link->lttpr_common_caps)) + return 0; + + lttpr_count = drm_dp_lttpr_count(dp->link->lttpr_common_caps); + rc = drm_dp_lttpr_init(dp->aux, lttpr_count); + if (rc) { + DRM_ERROR("failed to set LTTPRs transparency mode, rc=%d\n", rc); + return 0; + } + + return lttpr_count; +} + +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; + u8 dpcd[DP_RECEIVER_CAP_SIZE]; + + rc = drm_dp_read_dpcd_caps(dp->aux, dpcd); + if (rc) + goto end; + + dp->link->lttpr_count = msm_dp_display_lttpr_init(dp, dpcd); + + 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(dp->ctrl); + msm_dp_ctrl_enable_irq(dp->ctrl); + 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(dp->ctrl); + msm_dp_ctrl_disable_irq(dp->ctrl); + 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 (dp->audio_supported) + drm_connector_hdmi_audio_plugged_notify(msm_dp_display->connector, + 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 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); + goto error; + } + + dp->aux = msm_dp_aux_get(dev, phy, dp->msm_dp_display.is_edp, dp->aux_base); + 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; + } + + dp->panel = msm_dp_panel_get(dev, dp->aux, dp->link, dp->link_base, dp->p0_base); + 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, + phy, dp->ahb_base, dp->link_base); + 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->link_base); + 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; +} + +/** + * 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; + } + + 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) || + msm_dp_wide_bus_available(dp)) + mode_pclk_khz /= 2; + + if (mode_pclk_khz > DP_MAX_PIXEL_CLK_KHZ) + return MODE_CLOCK_HIGH; + + 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_disp_snapshot_add_block(disp_state, msm_dp_display->ahb_len, + msm_dp_display->ahb_base, "dp_ahb"); + msm_disp_snapshot_add_block(disp_state, msm_dp_display->aux_len, + msm_dp_display->aux_base, "dp_aux"); + msm_disp_snapshot_add_block(disp_state, msm_dp_display->link_len, + msm_dp_display->link_base, "dp_link"); + msm_disp_snapshot_add_block(disp_state, msm_dp_display->p0_len, + msm_dp_display->p0_base, "dp_p0"); + + 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_aux_get_hpd_intr_status(dp->aux); + + 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); + + 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 void __iomem *msm_dp_ioremap(struct platform_device *pdev, int idx, size_t *len) +{ + struct resource *res; + void __iomem *base; + + base = devm_platform_get_and_ioremap_resource(pdev, idx, &res); + if (!IS_ERR(base)) + *len = resource_size(res); + + return base; +} + +#define DP_DEFAULT_AHB_OFFSET 0x0000 +#define DP_DEFAULT_AHB_SIZE 0x0200 +#define DP_DEFAULT_AUX_OFFSET 0x0200 +#define DP_DEFAULT_AUX_SIZE 0x0200 +#define DP_DEFAULT_LINK_OFFSET 0x0400 +#define DP_DEFAULT_LINK_SIZE 0x0C00 +#define DP_DEFAULT_P0_OFFSET 0x1000 +#define DP_DEFAULT_P0_SIZE 0x0400 + +static int msm_dp_display_get_io(struct msm_dp_display_private *display) +{ + struct platform_device *pdev = display->msm_dp_display.pdev; + + display->ahb_base = msm_dp_ioremap(pdev, 0, &display->ahb_len); + if (IS_ERR(display->ahb_base)) + return PTR_ERR(display->ahb_base); + + display->aux_base = msm_dp_ioremap(pdev, 1, &display->aux_len); + if (IS_ERR(display->aux_base)) { + if (display->aux_base != ERR_PTR(-EINVAL)) { + DRM_ERROR("unable to remap aux region: %pe\n", display->aux_base); + return PTR_ERR(display->aux_base); + } + + /* + * The initial binding had a single reg, but in order to + * support variation in the sub-region sizes this was split. + * msm_dp_ioremap() will fail with -EINVAL here if only a single + * reg is specified, so fill in the sub-region offsets and + * lengths based on this single region. + */ + if (display->ahb_len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) { + DRM_ERROR("legacy memory region not large enough\n"); + return -EINVAL; + } + + display->ahb_len = DP_DEFAULT_AHB_SIZE; + display->aux_base = display->ahb_base + DP_DEFAULT_AUX_OFFSET; + display->aux_len = DP_DEFAULT_AUX_SIZE; + display->link_base = display->ahb_base + DP_DEFAULT_LINK_OFFSET; + display->link_len = DP_DEFAULT_LINK_SIZE; + display->p0_base = display->ahb_base + DP_DEFAULT_P0_OFFSET; + display->p0_len = DP_DEFAULT_P0_SIZE; + + return 0; + } + + display->link_base = msm_dp_ioremap(pdev, 2, &display->link_len); + if (IS_ERR(display->link_base)) { + DRM_ERROR("unable to remap link region: %pe\n", display->link_base); + return PTR_ERR(display->link_base); + } + + display->p0_base = msm_dp_ioremap(pdev, 3, &display->p0_len); + if (IS_ERR(display->p0_base)) { + DRM_ERROR("unable to remap p0 region: %pe\n", display->p0_base); + return PTR_ERR(display->p0_base); + } + + return 0; +} + +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_display_get_io(dp); + if (rc) + return rc; + + 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_aux_hpd_disable(dp->aux); + } + 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_aux_hpd_enable(dp->aux); + 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_atomic_state *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 hpd_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; + } + + hpd_state = msm_dp_display->hpd_state; + if (hpd_state != ST_DISPLAY_OFF && hpd_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; + } + + hpd_state = msm_dp_display->hpd_state; + + if (hpd_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_atomic_state *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_atomic_state *state) +{ + struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge); + struct msm_dp *dp = msm_dp_bridge->msm_dp_display; + u32 hpd_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); + + hpd_state = msm_dp_display->hpd_state; + if (hpd_state != ST_DISCONNECT_PENDING && hpd_state != ST_CONNECTED) + drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n", + dp->connector_type, hpd_state); + + msm_dp_display_disable(msm_dp_display); + + hpd_state = msm_dp_display->hpd_state; + if (hpd_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; +} + +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_aux_hpd_enable(dp->aux); + msm_dp_aux_hpd_intr_enable(dp->aux); + + 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); + + msm_dp_aux_hpd_intr_disable(dp->aux); + msm_dp_aux_hpd_disable(dp->aux); + + 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); +} |