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JustOS/linux-6.13/drivers/gpu/drm/msm/dp/dp_display.c

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2025-01-24 14:00:19 +00:00
// 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 <drm/display/drm_dp_aux_bus.h>
#include <drm/drm_edid.h>
#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);
}
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