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dp_display.c
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dp_display.c
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// 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/delay.h>
#include "msm_drv.h"
#include "msm_kms.h"
#include "dp_hpd.h"
#include "dp_parser.h"
#include "dp_power.h"
#include "dp_catalog.h"
#include "dp_aux.h"
#include "dp_reg.h"
#include "dp_link.h"
#include "dp_panel.h"
#include "dp_ctrl.h"
#include "dp_display.h"
#include "dp_drm.h"
#include "dp_audio.h"
#include "dp_debug.h"
static struct msm_dp *g_dp_display;
#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_CONNECT_PENDING,
ST_CONNECTED,
ST_DISCONNECT_PENDING,
ST_DISPLAY_OFF,
ST_SUSPENDED,
};
enum {
EV_NO_EVENT,
/* hpd events */
EV_HPD_INIT_SETUP,
EV_HPD_PLUG_INT,
EV_IRQ_HPD_INT,
EV_HPD_UNPLUG_INT,
EV_USER_NOTIFICATION,
EV_CONNECT_PENDING_TIMEOUT,
EV_DISCONNECT_PENDING_TIMEOUT,
};
#define EVENT_TIMEOUT (HZ/10) /* 100ms */
#define DP_EVENT_Q_MAX 8
#define DP_TIMEOUT_5_SECOND (5000/EVENT_TIMEOUT)
#define DP_TIMEOUT_NONE 0
#define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
struct dp_event {
u32 event_id;
u32 data;
u32 delay;
};
struct dp_display_private {
char *name;
int irq;
/* state variables */
bool core_initialized;
bool hpd_irq_on;
bool audio_supported;
struct platform_device *pdev;
struct dentry *root;
struct dp_usbpd *usbpd;
struct dp_parser *parser;
struct dp_power *power;
struct dp_catalog *catalog;
struct drm_dp_aux *aux;
struct dp_link *link;
struct dp_panel *panel;
struct dp_ctrl *ctrl;
struct dp_debug *debug;
struct dp_usbpd_cb usbpd_cb;
struct dp_display_mode dp_mode;
struct msm_dp 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 dp_event event_list[DP_EVENT_Q_MAX];
spinlock_t event_lock;
struct dp_audio *audio;
};
static const struct of_device_id dp_dt_match[] = {
{.compatible = "qcom,sc7180-dp"},
{}
};
static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
u32 data, u32 delay)
{
unsigned long flag;
struct dp_event *todo;
int pndx;
spin_lock_irqsave(&dp_priv->event_lock, flag);
pndx = dp_priv->event_pndx + 1;
pndx %= DP_EVENT_Q_MAX;
if (pndx == dp_priv->event_gndx) {
pr_err("event_q is full: pndx=%d gndx=%d\n",
dp_priv->event_pndx, dp_priv->event_gndx);
spin_unlock_irqrestore(&dp_priv->event_lock, flag);
return -EPERM;
}
todo = &dp_priv->event_list[dp_priv->event_pndx++];
dp_priv->event_pndx %= DP_EVENT_Q_MAX;
todo->event_id = event;
todo->data = data;
todo->delay = delay;
wake_up(&dp_priv->event_q);
spin_unlock_irqrestore(&dp_priv->event_lock, flag);
return 0;
}
static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
{
unsigned long flag;
struct dp_event *todo;
u32 gndx;
spin_lock_irqsave(&dp_priv->event_lock, flag);
if (dp_priv->event_pndx == dp_priv->event_gndx) {
spin_unlock_irqrestore(&dp_priv->event_lock, flag);
return -ENOENT;
}
gndx = dp_priv->event_gndx;
while (dp_priv->event_pndx != gndx) {
todo = &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(&dp_priv->event_lock, flag);
return 0;
}
void dp_display_signal_audio_start(struct msm_dp *dp_display)
{
struct dp_display_private *dp;
dp = container_of(dp_display, struct dp_display_private, dp_display);
reinit_completion(&dp->audio_comp);
}
void dp_display_signal_audio_complete(struct msm_dp *dp_display)
{
struct dp_display_private *dp;
dp = container_of(dp_display, struct dp_display_private, dp_display);
complete_all(&dp->audio_comp);
}
static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv);
static int dp_display_bind(struct device *dev, struct device *master,
void *data)
{
int rc = 0;
struct dp_display_private *dp;
struct drm_device *drm;
struct msm_drm_private *priv;
drm = dev_get_drvdata(master);
dp = container_of(g_dp_display,
struct dp_display_private, dp_display);
dp->dp_display.drm_dev = drm;
priv = drm->dev_private;
priv->dp = &(dp->dp_display);
rc = dp->parser->parse(dp->parser);
if (rc) {
DRM_ERROR("device tree parsing failed\n");
goto end;
}
dp->aux->drm_dev = drm;
rc = dp_aux_register(dp->aux);
if (rc) {
DRM_ERROR("DRM DP AUX register failed\n");
goto end;
}
rc = dp_power_client_init(dp->power);
if (rc) {
DRM_ERROR("Power client create failed\n");
goto end;
}
rc = dp_register_audio_driver(dev, dp->audio);
if (rc) {
DRM_ERROR("Audio registration Dp failed\n");
goto end;
}
rc = dp_hpd_event_thread_start(dp);
if (rc) {
DRM_ERROR("Event thread create failed\n");
goto end;
}
return 0;
end:
return rc;
}
static void dp_display_unbind(struct device *dev, struct device *master,
void *data)
{
struct dp_display_private *dp;
struct drm_device *drm = dev_get_drvdata(master);
struct msm_drm_private *priv = drm->dev_private;
dp = container_of(g_dp_display,
struct dp_display_private, dp_display);
/* disable all HPD interrupts */
dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
kthread_stop(dp->ev_tsk);
dp_power_client_deinit(dp->power);
dp_aux_unregister(dp->aux);
priv->dp = NULL;
}
static const struct component_ops dp_display_comp_ops = {
.bind = dp_display_bind,
.unbind = dp_display_unbind,
};
static bool dp_display_is_ds_bridge(struct dp_panel *panel)
{
return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
DP_DWN_STRM_PORT_PRESENT);
}
static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
{
DRM_DEBUG_DP("present=%#x sink_count=%d\n", dp->panel->dpcd[DP_DOWNSTREAMPORT_PRESENT],
dp->link->sink_count);
return dp_display_is_ds_bridge(dp->panel) &&
(dp->link->sink_count == 0);
}
static void dp_display_send_hpd_event(struct msm_dp *dp_display)
{
struct dp_display_private *dp;
struct drm_connector *connector;
dp = container_of(dp_display, struct dp_display_private, dp_display);
connector = dp->dp_display.connector;
drm_helper_hpd_irq_event(connector->dev);
}
static int dp_display_send_hpd_notification(struct dp_display_private *dp,
bool hpd)
{
if ((hpd && dp->dp_display.is_connected) ||
(!hpd && !dp->dp_display.is_connected)) {
DRM_DEBUG_DP("HPD already %s\n", (hpd ? "on" : "off"));
return 0;
}
/* reset video pattern flag on disconnect */
if (!hpd)
dp->panel->video_test = false;
dp->dp_display.is_connected = hpd;
DRM_DEBUG_DP("hpd=%d\n", hpd);
dp_display_send_hpd_event(&dp->dp_display);
return 0;
}
static int dp_display_process_hpd_high(struct dp_display_private *dp)
{
int rc = 0;
struct edid *edid;
dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
if (rc)
goto end;
dp_link_process_request(dp->link);
edid = dp->panel->edid;
dp->audio_supported = drm_detect_monitor_audio(edid);
dp_panel_handle_sink_request(dp->panel);
dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ;
dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
/*
* set sink to normal operation mode -- D0
* before dpcd read
*/
dp_link_psm_config(dp->link, &dp->panel->link_info, false);
dp_link_reset_phy_params_vx_px(dp->link);
rc = dp_ctrl_on_link(dp->ctrl);
if (rc) {
DRM_ERROR("failed to complete DP link training\n");
goto end;
}
dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
end:
return rc;
}
static void dp_display_host_init(struct dp_display_private *dp, int reset)
{
bool flip = false;
DRM_DEBUG_DP("core_initialized=%d\n", dp->core_initialized);
if (dp->core_initialized) {
DRM_DEBUG_DP("DP core already initialized\n");
return;
}
if (dp->usbpd->orientation == ORIENTATION_CC2)
flip = true;
dp_power_init(dp->power, flip);
dp_ctrl_host_init(dp->ctrl, flip, reset);
dp_aux_init(dp->aux);
dp->core_initialized = true;
}
static void dp_display_host_deinit(struct dp_display_private *dp)
{
if (!dp->core_initialized) {
DRM_DEBUG_DP("DP core not initialized\n");
return;
}
dp_ctrl_host_deinit(dp->ctrl);
dp_aux_deinit(dp->aux);
dp_power_deinit(dp->power);
dp->core_initialized = false;
}
static int dp_display_usbpd_configure_cb(struct device *dev)
{
int rc = 0;
struct dp_display_private *dp;
if (!dev) {
DRM_ERROR("invalid dev\n");
rc = -EINVAL;
goto end;
}
dp = container_of(g_dp_display,
struct dp_display_private, dp_display);
dp_display_host_init(dp, false);
rc = dp_display_process_hpd_high(dp);
end:
return rc;
}
static int dp_display_usbpd_disconnect_cb(struct device *dev)
{
int rc = 0;
struct dp_display_private *dp;
if (!dev) {
DRM_ERROR("invalid dev\n");
rc = -EINVAL;
return rc;
}
dp = container_of(g_dp_display,
struct dp_display_private, dp_display);
dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
return rc;
}
static void dp_display_handle_video_request(struct dp_display_private *dp)
{
if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
dp->panel->video_test = true;
dp_link_send_test_response(dp->link);
}
}
static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
{
int rc = 0;
if (dp_display_is_sink_count_zero(dp)) {
DRM_DEBUG_DP("sink count is zero, nothing to do\n");
if (dp->hpd_state != ST_DISCONNECTED) {
dp->hpd_state = ST_DISCONNECT_PENDING;
dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
}
} else {
if (dp->hpd_state == ST_DISCONNECTED) {
dp->hpd_state = ST_CONNECT_PENDING;
rc = dp_display_process_hpd_high(dp);
if (rc)
dp->hpd_state = ST_DISCONNECTED;
}
}
return rc;
}
static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
{
u32 sink_request = dp->link->sink_request;
DRM_DEBUG_DP("%d\n", sink_request);
if (dp->hpd_state == ST_DISCONNECTED) {
if (sink_request & DP_LINK_STATUS_UPDATED) {
DRM_DEBUG_DP("Disconnected sink_request: %d\n", sink_request);
DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
return -EINVAL;
}
}
dp_ctrl_handle_sink_request(dp->ctrl);
if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
dp_display_handle_video_request(dp);
return 0;
}
static int dp_display_usbpd_attention_cb(struct device *dev)
{
int rc = 0;
u32 sink_request;
struct dp_display_private *dp;
if (!dev) {
DRM_ERROR("invalid dev\n");
return -EINVAL;
}
dp = container_of(g_dp_display,
struct dp_display_private, dp_display);
/* check for any test request issued by sink */
rc = dp_link_process_request(dp->link);
if (!rc) {
sink_request = dp->link->sink_request;
DRM_DEBUG_DP("hpd_state=%d sink_request=%d\n", dp->hpd_state, sink_request);
if (sink_request & DS_PORT_STATUS_CHANGED)
rc = dp_display_handle_port_ststus_changed(dp);
else
rc = dp_display_handle_irq_hpd(dp);
}
return rc;
}
static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
{
struct dp_usbpd *hpd = dp->usbpd;
u32 state;
u32 tout = DP_TIMEOUT_5_SECOND;
int ret;
if (!hpd)
return 0;
mutex_lock(&dp->event_mutex);
state = dp->hpd_state;
DRM_DEBUG_DP("hpd_state=%d\n", state);
if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
mutex_unlock(&dp->event_mutex);
return 0;
}
if (state == ST_CONNECT_PENDING || state == ST_CONNECTED) {
mutex_unlock(&dp->event_mutex);
return 0;
}
if (state == ST_DISCONNECT_PENDING) {
/* wait until ST_DISCONNECTED */
dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
mutex_unlock(&dp->event_mutex);
return 0;
}
dp->hpd_state = ST_CONNECT_PENDING;
hpd->hpd_high = 1;
ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
if (ret) { /* link train failed */
hpd->hpd_high = 0;
dp->hpd_state = ST_DISCONNECTED;
if (ret == -ECONNRESET) { /* cable unplugged */
dp->core_initialized = false;
}
} else {
/* start sentinel checking in case of missing uevent */
dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout);
}
/* enable HDP irq_hpd/replug interrupt */
dp_catalog_hpd_config_intr(dp->catalog,
DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true);
mutex_unlock(&dp->event_mutex);
/* uevent will complete connection part */
return 0;
};
static int dp_display_enable(struct dp_display_private *dp, u32 data);
static int dp_display_disable(struct dp_display_private *dp, u32 data);
static int dp_connect_pending_timeout(struct dp_display_private *dp, u32 data)
{
u32 state;
mutex_lock(&dp->event_mutex);
state = dp->hpd_state;
if (state == ST_CONNECT_PENDING)
dp->hpd_state = ST_CONNECTED;
mutex_unlock(&dp->event_mutex);
return 0;
}
static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
bool plugged)
{
struct dp_display_private *dp;
dp = container_of(dp_display,
struct dp_display_private, dp_display);
/* notify audio subsystem only if sink supports audio */
if (dp_display->plugged_cb && dp_display->codec_dev &&
dp->audio_supported)
dp_display->plugged_cb(dp_display->codec_dev, plugged);
}
static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
{
struct dp_usbpd *hpd = dp->usbpd;
u32 state;
if (!hpd)
return 0;
mutex_lock(&dp->event_mutex);
state = dp->hpd_state;
/* disable irq_hpd/replug interrupts */
dp_catalog_hpd_config_intr(dp->catalog,
DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false);
/* unplugged, no more irq_hpd handle */
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) {
dp_ctrl_off_phy(dp->ctrl);
hpd->hpd_high = 0;
dp->core_initialized = false;
}
mutex_unlock(&dp->event_mutex);
return 0;
}
if (state == ST_DISCONNECT_PENDING) {
mutex_unlock(&dp->event_mutex);
return 0;
}
if (state == ST_CONNECT_PENDING) {
/* wait until CONNECTED */
dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 1); /* delay = 1 */
mutex_unlock(&dp->event_mutex);
return 0;
}
dp->hpd_state = ST_DISCONNECT_PENDING;
/* disable HPD plug interrupts */
dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
hpd->hpd_high = 0;
/*
* We don't need separate work for disconnect as
* connect/attention interrupts are disabled
*/
dp_display_usbpd_disconnect_cb(&dp->pdev->dev);
/* start sentinel checking in case of missing uevent */
dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
DRM_DEBUG_DP("hpd_state=%d\n", state);
/* signal the disconnect event early to ensure proper teardown */
dp_display_handle_plugged_change(g_dp_display, false);
/* enable HDP plug interrupt to prepare for next plugin */
dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
/* uevent will complete disconnection part */
mutex_unlock(&dp->event_mutex);
return 0;
}
static int dp_disconnect_pending_timeout(struct dp_display_private *dp, u32 data)
{
u32 state;
mutex_lock(&dp->event_mutex);
state = dp->hpd_state;
if (state == ST_DISCONNECT_PENDING)
dp->hpd_state = ST_DISCONNECTED;
mutex_unlock(&dp->event_mutex);
return 0;
}
static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
{
u32 state;
int ret;
mutex_lock(&dp->event_mutex);
/* irq_hpd can happen at either connected or disconnected state */
state = dp->hpd_state;
if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
mutex_unlock(&dp->event_mutex);
return 0;
}
if (state == ST_CONNECT_PENDING) {
/* wait until ST_CONNECTED */
dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
mutex_unlock(&dp->event_mutex);
return 0;
}
if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) {
/* wait until ST_CONNECTED */
dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
mutex_unlock(&dp->event_mutex);
return 0;
}
ret = dp_display_usbpd_attention_cb(&dp->pdev->dev);
if (ret == -ECONNRESET) { /* cable unplugged */
dp->core_initialized = false;
}
DRM_DEBUG_DP("hpd_state=%d\n", state);
mutex_unlock(&dp->event_mutex);
return 0;
}
static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
{
dp_debug_put(dp->debug);
dp_panel_put(dp->panel);
dp_aux_put(dp->aux);
dp_audio_put(dp->audio);
}
static int dp_init_sub_modules(struct dp_display_private *dp)
{
int rc = 0;
struct device *dev = &dp->pdev->dev;
struct dp_usbpd_cb *cb = &dp->usbpd_cb;
struct dp_panel_in panel_in = {
.dev = dev,
};
/* Callback APIs used for cable status change event */
cb->configure = dp_display_usbpd_configure_cb;
cb->disconnect = dp_display_usbpd_disconnect_cb;
cb->attention = dp_display_usbpd_attention_cb;
dp->usbpd = dp_hpd_get(dev, cb);
if (IS_ERR(dp->usbpd)) {
rc = PTR_ERR(dp->usbpd);
DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
dp->usbpd = NULL;
goto error;
}
dp->parser = dp_parser_get(dp->pdev);
if (IS_ERR(dp->parser)) {
rc = PTR_ERR(dp->parser);
DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
dp->parser = NULL;
goto error;
}
dp->catalog = dp_catalog_get(dev, &dp->parser->io);
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->power = dp_power_get(dev, dp->parser);
if (IS_ERR(dp->power)) {
rc = PTR_ERR(dp->power);
DRM_ERROR("failed to initialize power, rc = %d\n", rc);
dp->power = NULL;
goto error;
}
dp->aux = dp_aux_get(dev, dp->catalog);
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 = 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 = 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 = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
dp->power, dp->catalog, dp->parser);
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 = dp_audio_get(dp->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:
dp_panel_put(dp->panel);
error_link:
dp_aux_put(dp->aux);
error:
return rc;
}
static int dp_display_set_mode(struct msm_dp *dp_display,
struct dp_display_mode *mode)
{
struct dp_display_private *dp;
dp = container_of(dp_display, struct dp_display_private, dp_display);
dp->panel->dp_mode.drm_mode = mode->drm_mode;
dp->panel->dp_mode.bpp = mode->bpp;
dp->panel->dp_mode.capabilities = mode->capabilities;
dp_panel_init_panel_info(dp->panel);
return 0;
}
static int dp_display_prepare(struct msm_dp *dp)
{
return 0;
}
static int dp_display_enable(struct dp_display_private *dp, u32 data)
{
int rc = 0;
struct msm_dp *dp_display;
dp_display = g_dp_display;
DRM_DEBUG_DP("sink_count=%d\n", dp->link->sink_count);
if (dp_display->power_on) {
DRM_DEBUG_DP("Link already setup, return\n");
return 0;
}
rc = dp_ctrl_on_stream(dp->ctrl);
if (!rc)
dp_display->power_on = true;
return rc;
}
static int dp_display_post_enable(struct msm_dp *dp_display)
{
struct dp_display_private *dp;
u32 rate;
dp = container_of(dp_display, struct dp_display_private, 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 */
dp_display_handle_plugged_change(dp_display, true);
return 0;
}
static int dp_display_disable(struct dp_display_private *dp, u32 data)
{
struct msm_dp *dp_display;
dp_display = g_dp_display;
if (!dp_display->power_on)
return 0;
/* wait only if audio was enabled */
if (dp_display->audio_enabled) {
/* signal the disconnect event */
dp_display_handle_plugged_change(dp_display, false);
if (!wait_for_completion_timeout(&dp->audio_comp,
HZ * 5))
DRM_ERROR("audio comp timeout\n");
}
dp_display->audio_enabled = false;
/* triggered by irq_hpd with sink_count = 0 */
if (dp->link->sink_count == 0) {
dp_ctrl_off_link_stream(dp->ctrl);
} else {
dp_ctrl_off(dp->ctrl);
dp->core_initialized = false;
}
dp_display->power_on = false;
DRM_DEBUG_DP("sink count: %d\n", dp->link->sink_count);
return 0;
}
static int dp_display_unprepare(struct msm_dp *dp)
{
return 0;
}
int dp_display_set_plugged_cb(struct msm_dp *dp_display,
hdmi_codec_plugged_cb fn, struct device *codec_dev)
{
bool plugged;
dp_display->plugged_cb = fn;
dp_display->codec_dev = codec_dev;
plugged = dp_display->is_connected;
dp_display_handle_plugged_change(dp_display, plugged);
return 0;
}
int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
{
const u32 num_components = 3, default_bpp = 24;
struct dp_display_private *dp_display;
struct dp_link_info *link_info;
u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
if (!dp || !mode_pclk_khz || !dp->connector) {
DRM_ERROR("invalid params\n");
return -EINVAL;
}
dp_display = container_of(dp, struct dp_display_private, dp_display);
link_info = &dp_display->panel->link_info;
mode_bpp = dp->connector->display_info.bpc * num_components;
if (!mode_bpp)
mode_bpp = default_bpp;
mode_bpp = dp_panel_get_mode_bpp(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 dp_display_get_modes(struct msm_dp *dp,
struct dp_display_mode *dp_mode)
{
struct dp_display_private *dp_display;
int ret = 0;
if (!dp) {
DRM_ERROR("invalid params\n");
return 0;
}
dp_display = container_of(dp, struct dp_display_private, dp_display);
ret = dp_panel_get_modes(dp_display->panel,
dp->connector, dp_mode);
if (dp_mode->drm_mode.clock)
dp->max_pclk_khz = dp_mode->drm_mode.clock;
return ret;
}