#include <linux/clk.h>
#include <linux/component.h>
#include <linux/extcon.h>
#include <linux/firmware.h>
#include <linux/mfd/syscon.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <sound/hdmi-codec.h>
#include <drm/display/drm_dp_helper.h>
#include <drm/display/drm_hdmi_audio_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge_connector.h>
#include <drm/drm_edid.h>
#include <drm/drm_of.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include "cdn-dp-core.h"
#include "cdn-dp-reg.h"
static inline struct cdn_dp_device *bridge_to_dp(struct drm_bridge *bridge)
{
return container_of(bridge, struct cdn_dp_device, bridge);
}
static inline struct cdn_dp_device *encoder_to_dp(struct drm_encoder *encoder)
{
struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
return container_of(rkencoder, struct cdn_dp_device, encoder);
}
#define GRF_SOC_CON9 0x6224
#define DP_SEL_VOP_LIT BIT(12)
#define GRF_SOC_CON26 0x6268
#define DPTX_HPD_SEL (3 << 12)
#define DPTX_HPD_DEL (2 << 12)
#define DPTX_HPD_SEL_MASK (3 << 28)
#define CDN_FW_TIMEOUT_MS (64 * 1000)
#define CDN_DPCD_TIMEOUT_MS 5000
#define CDN_DP_FIRMWARE "rockchip/dptx.bin"
MODULE_FIRMWARE(CDN_DP_FIRMWARE);
struct cdn_dp_data {
u8 max_phy;
};
static struct cdn_dp_data rk3399_cdn_dp = {
.max_phy = 2,
};
static const struct of_device_id cdn_dp_dt_ids[] = {
{ .compatible = "rockchip,rk3399-cdn-dp",
.data = (void *)&rk3399_cdn_dp },
{}
};
MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
static int cdn_dp_grf_write(struct cdn_dp_device *dp,
unsigned int reg, unsigned int val)
{
int ret;
ret = clk_prepare_enable(dp->grf_clk);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
return ret;
}
ret = regmap_write(dp->grf, reg, val);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
clk_disable_unprepare(dp->grf_clk);
return ret;
}
clk_disable_unprepare(dp->grf_clk);
return 0;
}
static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
{
int ret;
unsigned long rate;
ret = clk_prepare_enable(dp->pclk);
if (ret < 0) {
DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
goto err_pclk;
}
ret = clk_prepare_enable(dp->core_clk);
if (ret < 0) {
DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
goto err_core_clk;
}
ret = pm_runtime_get_sync(dp->dev);
if (ret < 0) {
DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
goto err_pm_runtime_get;
}
reset_control_assert(dp->core_rst);
reset_control_assert(dp->dptx_rst);
reset_control_assert(dp->apb_rst);
reset_control_deassert(dp->core_rst);
reset_control_deassert(dp->dptx_rst);
reset_control_deassert(dp->apb_rst);
rate = clk_get_rate(dp->core_clk);
if (!rate) {
DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
ret = -EINVAL;
goto err_set_rate;
}
cdn_dp_set_fw_clk(dp, rate);
cdn_dp_clock_reset(dp);
return 0;
err_set_rate:
pm_runtime_put(dp->dev);
err_pm_runtime_get:
clk_disable_unprepare(dp->core_clk);
err_core_clk:
clk_disable_unprepare(dp->pclk);
err_pclk:
return ret;
}
static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
{
pm_runtime_put_sync(dp->dev);
clk_disable_unprepare(dp->pclk);
clk_disable_unprepare(dp->core_clk);
}
static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
{
struct extcon_dev *edev = port->extcon;
union extcon_property_value property;
int dptx;
u8 lanes;
dptx = extcon_get_state(edev, EXTCON_DISP_DP);
if (dptx > 0) {
extcon_get_property(edev, EXTCON_DISP_DP,
EXTCON_PROP_USB_SS, &property);
if (property.intval)
lanes = 2;
else
lanes = 4;
} else {
lanes = 0;
}
return lanes;
}
static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
{
int ret;
u8 value;
*sink_count = 0;
ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
if (ret)
return ret;
*sink_count = DP_GET_SINK_COUNT(value);
return 0;
}
static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
{
struct cdn_dp_port *port;
int i, lanes;
for (i = 0; i < dp->ports; i++) {
port = dp->port[i];
lanes = cdn_dp_get_port_lanes(port);
if (lanes)
return port;
}
return NULL;
}
static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
{
unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
struct cdn_dp_port *port;
u8 sink_count = 0;
if (dp->active_port < 0 || dp->active_port >= dp->ports) {
DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
return false;
}
port = dp->port[dp->active_port];
while (time_before(jiffies, timeout)) {
if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
return false;
if (!cdn_dp_get_sink_count(dp, &sink_count))
return sink_count ? true : false;
usleep_range(5000, 10000);
}
DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
return false;
}
static enum drm_connector_status
cdn_dp_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connector)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
enum drm_connector_status status = connector_status_disconnected;
mutex_lock(&dp->lock);
if (dp->connected)
status = connector_status_connected;
mutex_unlock(&dp->lock);
return status;
}
static const struct drm_edid *
cdn_dp_bridge_edid_read(struct drm_bridge *bridge, struct drm_connector *connector)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
const struct drm_edid *drm_edid;
mutex_lock(&dp->lock);
drm_edid = drm_edid_read_custom(connector, cdn_dp_get_edid_block, dp);
mutex_unlock(&dp->lock);
return drm_edid;
}
static enum drm_mode_status
cdn_dp_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *display_info,
const struct drm_display_mode *mode)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
u32 requested, actual, rate, sink_max, source_max = 0;
u8 lanes, bpc;
if (!dp->connected)
return MODE_BAD;
switch (display_info->bpc) {
case 10:
bpc = 10;
break;
case 6:
bpc = 6;
break;
default:
bpc = 8;
break;
}
requested = mode->clock * bpc * 3 / 1000;
source_max = dp->lanes;
sink_max = drm_dp_max_lane_count(dp->dpcd);
lanes = min(source_max, sink_max);
source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
sink_max = drm_dp_max_link_rate(dp->dpcd);
rate = min(source_max, sink_max);
actual = rate * lanes / 100;
actual = actual * 8 / 10;
if (requested > actual) {
DRM_DEV_DEBUG_KMS(dp->dev,
"requested=%d, actual=%d, clock=%d\n",
requested, actual, mode->clock);
return MODE_CLOCK_HIGH;
}
return MODE_OK;
}
static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
{
int ret;
const u32 *iram_data, *dram_data;
const struct firmware *fw = dp->fw;
const struct cdn_firmware_header *hdr;
hdr = (struct cdn_firmware_header *)fw->data;
if (fw->size != le32_to_cpu(hdr->size_bytes)) {
DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
return -EINVAL;
}
iram_data = (const u32 *)(fw->data + hdr->header_size);
dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
dram_data, hdr->dram_size);
if (ret)
return ret;
ret = cdn_dp_set_firmware_active(dp, true);
if (ret) {
DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
return ret;
}
return cdn_dp_event_config(dp);
}
static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
{
int ret;
if (!cdn_dp_check_sink_connection(dp))
return -ENODEV;
ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
DP_RECEIVER_CAP_SIZE);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
return ret;
}
return 0;
}
static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
{
union extcon_property_value property;
int ret;
if (!port->phy_enabled) {
ret = phy_power_on(port->phy);
if (ret) {
DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
ret);
goto err_phy;
}
port->phy_enabled = true;
}
ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
goto err_power_on;
}
ret = cdn_dp_get_hpd_status(dp);
if (ret <= 0) {
if (!ret)
DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
goto err_power_on;
}
ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
EXTCON_PROP_USB_TYPEC_POLARITY, &property);
if (ret) {
DRM_DEV_ERROR(dp->dev, "get property failed\n");
goto err_power_on;
}
port->lanes = cdn_dp_get_port_lanes(port);
ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
if (ret) {
DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
ret);
goto err_power_on;
}
dp->active_port = port->id;
return 0;
err_power_on:
if (phy_power_off(port->phy))
DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
else
port->phy_enabled = false;
err_phy:
cdn_dp_grf_write(dp, GRF_SOC_CON26,
DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
return ret;
}
static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
struct cdn_dp_port *port)
{
int ret;
if (port->phy_enabled) {
ret = phy_power_off(port->phy);
if (ret) {
DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
return ret;
}
}
port->phy_enabled = false;
port->lanes = 0;
dp->active_port = -1;
return 0;
}
static int cdn_dp_disable(struct cdn_dp_device *dp)
{
int ret, i;
if (!dp->active)
return 0;
for (i = 0; i < dp->ports; i++)
cdn_dp_disable_phy(dp, dp->port[i]);
ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
ret);
return ret;
}
cdn_dp_set_firmware_active(dp, false);
cdn_dp_clk_disable(dp);
dp->active = false;
dp->max_lanes = 0;
dp->max_rate = 0;
return 0;
}
static int cdn_dp_enable(struct cdn_dp_device *dp)
{
int ret, i, lanes;
struct cdn_dp_port *port;
port = cdn_dp_connected_port(dp);
if (!port) {
DRM_DEV_ERROR(dp->dev,
"Can't enable without connection\n");
return -ENODEV;
}
if (dp->active)
return 0;
ret = cdn_dp_clk_enable(dp);
if (ret)
return ret;
ret = cdn_dp_firmware_init(dp);
if (ret) {
DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
goto err_clk_disable;
}
for (i = port->id; i < dp->ports; i++) {
port = dp->port[i];
lanes = cdn_dp_get_port_lanes(port);
if (lanes) {
ret = cdn_dp_enable_phy(dp, port);
if (ret)
continue;
ret = cdn_dp_get_sink_capability(dp);
if (ret) {
cdn_dp_disable_phy(dp, port);
} else {
dp->active = true;
dp->lanes = port->lanes;
return 0;
}
}
}
err_clk_disable:
cdn_dp_clk_disable(dp);
return ret;
}
static void cdn_dp_bridge_mode_set(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
const struct drm_display_mode *adjusted)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
struct video_info *video = &dp->video_info;
video->color_fmt = PXL_RGB;
video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
drm_mode_copy(&dp->mode, adjusted);
}
static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
{
u8 link_status[DP_LINK_STATUS_SIZE];
struct cdn_dp_port *port = cdn_dp_connected_port(dp);
u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
if (!port || !dp->max_rate || !dp->max_lanes)
return false;
if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
DP_LINK_STATUS_SIZE)) {
DRM_ERROR("Failed to get link status\n");
return false;
}
return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
}
static void cdn_dp_display_info_update(struct cdn_dp_device *dp,
struct drm_display_info *display_info)
{
struct video_info *video = &dp->video_info;
switch (display_info->bpc) {
case 10:
video->color_depth = 10;
break;
case 6:
video->color_depth = 6;
break;
default:
video->color_depth = 8;
break;
}
}
static void cdn_dp_bridge_atomic_enable(struct drm_bridge *bridge, struct drm_atomic_commit *state)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
struct drm_connector *connector;
int ret, val;
connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
if (!connector)
return;
cdn_dp_display_info_update(dp, &connector->display_info);
ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, &dp->encoder.encoder);
if (ret < 0) {
DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
return;
}
DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
(ret) ? "LIT" : "BIG");
if (ret)
val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
else
val = DP_SEL_VOP_LIT << 16;
ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
if (ret)
return;
mutex_lock(&dp->lock);
ret = cdn_dp_enable(dp);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to enable bridge %d\n",
ret);
goto out;
}
if (!cdn_dp_check_link_status(dp)) {
ret = cdn_dp_train_link(dp);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
goto out;
}
}
ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
goto out;
}
ret = cdn_dp_config_video(dp);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
goto out;
}
ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
goto out;
}
out:
mutex_unlock(&dp->lock);
}
static void cdn_dp_bridge_atomic_disable(struct drm_bridge *bridge, struct drm_atomic_commit *state)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
int ret;
mutex_lock(&dp->lock);
if (dp->active) {
ret = cdn_dp_disable(dp);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Failed to disable bridge %d\n",
ret);
}
}
mutex_unlock(&dp->lock);
if (!dp->connected && cdn_dp_connected_port(dp))
schedule_work(&dp->event_work);
}
static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
return 0;
}
static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
.atomic_check = cdn_dp_encoder_atomic_check,
};
static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
{
struct device *dev = dp->dev;
struct device_node *np = dev->of_node;
struct platform_device *pdev = to_platform_device(dev);
dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
if (IS_ERR(dp->grf)) {
DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
return PTR_ERR(dp->grf);
}
dp->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(dp->regs)) {
DRM_DEV_ERROR(dev, "ioremap reg failed\n");
return PTR_ERR(dp->regs);
}
dp->core_clk = devm_clk_get(dev, "core-clk");
if (IS_ERR(dp->core_clk)) {
DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
return PTR_ERR(dp->core_clk);
}
dp->pclk = devm_clk_get(dev, "pclk");
if (IS_ERR(dp->pclk)) {
DRM_DEV_ERROR(dev, "cannot get pclk\n");
return PTR_ERR(dp->pclk);
}
dp->spdif_clk = devm_clk_get(dev, "spdif");
if (IS_ERR(dp->spdif_clk)) {
DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
return PTR_ERR(dp->spdif_clk);
}
dp->grf_clk = devm_clk_get(dev, "grf");
if (IS_ERR(dp->grf_clk)) {
DRM_DEV_ERROR(dev, "cannot get grf clk\n");
return PTR_ERR(dp->grf_clk);
}
dp->spdif_rst = devm_reset_control_get(dev, "spdif");
if (IS_ERR(dp->spdif_rst)) {
DRM_DEV_ERROR(dev, "no spdif reset control found\n");
return PTR_ERR(dp->spdif_rst);
}
dp->dptx_rst = devm_reset_control_get(dev, "dptx");
if (IS_ERR(dp->dptx_rst)) {
DRM_DEV_ERROR(dev, "no uphy reset control found\n");
return PTR_ERR(dp->dptx_rst);
}
dp->core_rst = devm_reset_control_get(dev, "core");
if (IS_ERR(dp->core_rst)) {
DRM_DEV_ERROR(dev, "no core reset control found\n");
return PTR_ERR(dp->core_rst);
}
dp->apb_rst = devm_reset_control_get(dev, "apb");
if (IS_ERR(dp->apb_rst)) {
DRM_DEV_ERROR(dev, "no apb reset control found\n");
return PTR_ERR(dp->apb_rst);
}
return 0;
}
static int cdn_dp_audio_prepare(struct drm_bridge *bridge,
struct drm_connector *connector,
struct hdmi_codec_daifmt *daifmt,
struct hdmi_codec_params *params)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
struct audio_info audio = {
.sample_width = params->sample_width,
.sample_rate = params->sample_rate,
.channels = params->channels,
};
int ret;
mutex_lock(&dp->lock);
if (!dp->active) {
ret = -ENODEV;
goto out;
}
switch (daifmt->fmt) {
case HDMI_I2S:
audio.format = AFMT_I2S;
break;
case HDMI_SPDIF:
audio.format = AFMT_SPDIF;
break;
default:
drm_err(bridge->dev, "Invalid format %d\n", daifmt->fmt);
ret = -EINVAL;
goto out;
}
ret = cdn_dp_audio_config(dp, &audio);
if (!ret)
dp->audio_info = audio;
out:
mutex_unlock(&dp->lock);
return ret;
}
static void cdn_dp_audio_shutdown(struct drm_bridge *bridge,
struct drm_connector *connector)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
int ret;
mutex_lock(&dp->lock);
if (!dp->active)
goto out;
ret = cdn_dp_audio_stop(dp, &dp->audio_info);
if (!ret)
dp->audio_info.format = AFMT_UNUSED;
out:
mutex_unlock(&dp->lock);
}
static int cdn_dp_audio_mute_stream(struct drm_bridge *bridge,
struct drm_connector *connector,
bool enable, int direction)
{
struct cdn_dp_device *dp = bridge_to_dp(bridge);
int ret;
mutex_lock(&dp->lock);
if (!dp->active) {
ret = -ENODEV;
goto out;
}
ret = cdn_dp_audio_mute(dp, enable);
out:
mutex_unlock(&dp->lock);
return ret;
}
static const struct drm_bridge_funcs cdn_dp_bridge_funcs = {
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
.detect = cdn_dp_bridge_detect,
.edid_read = cdn_dp_bridge_edid_read,
.atomic_enable = cdn_dp_bridge_atomic_enable,
.atomic_disable = cdn_dp_bridge_atomic_disable,
.mode_valid = cdn_dp_bridge_mode_valid,
.mode_set = cdn_dp_bridge_mode_set,
.dp_audio_prepare = cdn_dp_audio_prepare,
.dp_audio_mute_stream = cdn_dp_audio_mute_stream,
.dp_audio_shutdown = cdn_dp_audio_shutdown,
};
static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
{
int ret;
unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
unsigned long sleep = 1000;
WARN_ON(!mutex_is_locked(&dp->lock));
if (dp->fw_loaded)
return 0;
mutex_unlock(&dp->lock);
while (time_before(jiffies, timeout)) {
ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
if (ret == -ENOENT) {
msleep(sleep);
sleep *= 2;
continue;
} else if (ret) {
DRM_DEV_ERROR(dp->dev,
"failed to request firmware: %d\n", ret);
goto out;
}
dp->fw_loaded = true;
ret = 0;
goto out;
}
DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
ret = -ETIMEDOUT;
out:
mutex_lock(&dp->lock);
return ret;
}
static void cdn_dp_pd_event_work(struct work_struct *work)
{
struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
event_work);
int ret;
mutex_lock(&dp->lock);
if (dp->suspended)
goto out;
ret = cdn_dp_request_firmware(dp);
if (ret)
goto out;
dp->connected = true;
if (!cdn_dp_connected_port(dp)) {
DRM_DEV_INFO(dp->dev, "Not connected; disabling cdn\n");
dp->connected = false;
} else if (!dp->active) {
DRM_DEV_INFO(dp->dev, "Connected, not enabled; enabling cdn\n");
ret = cdn_dp_enable(dp);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Enabling dp failed: %d\n", ret);
dp->connected = false;
}
} else if (!cdn_dp_check_sink_connection(dp)) {
DRM_DEV_INFO(dp->dev, "Connected without sink; assert hpd\n");
dp->connected = false;
} else if (!cdn_dp_check_link_status(dp)) {
unsigned int rate = dp->max_rate;
unsigned int lanes = dp->max_lanes;
struct drm_display_mode *mode = &dp->mode;
DRM_DEV_INFO(dp->dev, "Connected with sink; re-train link\n");
ret = cdn_dp_train_link(dp);
if (ret) {
dp->connected = false;
DRM_DEV_ERROR(dp->dev, "Training link failed: %d\n", ret);
goto out;
}
if (mode->clock &&
(rate != dp->max_rate || lanes != dp->max_lanes)) {
ret = cdn_dp_config_video(dp);
if (ret) {
dp->connected = false;
DRM_DEV_ERROR(dp->dev, "Failed to configure video: %d\n", ret);
}
}
}
out:
mutex_unlock(&dp->lock);
drm_bridge_hpd_notify(&dp->bridge,
dp->connected ? connector_status_connected
: connector_status_disconnected);
}
static int cdn_dp_pd_event(struct notifier_block *nb,
unsigned long event, void *priv)
{
struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
event_nb);
struct cdn_dp_device *dp = port->dp;
schedule_work(&dp->event_work);
return NOTIFY_DONE;
}
static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
{
struct cdn_dp_device *dp = dev_get_drvdata(dev);
struct drm_encoder *encoder;
struct drm_connector *connector;
struct cdn_dp_port *port;
struct drm_device *drm_dev = data;
int ret, i;
ret = cdn_dp_parse_dt(dp);
if (ret < 0)
return ret;
dp->drm_dev = drm_dev;
dp->connected = false;
dp->active = false;
dp->active_port = -1;
dp->fw_loaded = false;
INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
encoder = &dp->encoder.encoder;
encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
dev->of_node);
DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
ret = drm_simple_encoder_init(drm_dev, encoder,
DRM_MODE_ENCODER_TMDS);
if (ret) {
DRM_ERROR("failed to initialize encoder with drm\n");
return ret;
}
drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
dp->bridge.ops =
DRM_BRIDGE_OP_DETECT |
DRM_BRIDGE_OP_EDID |
DRM_BRIDGE_OP_HPD |
DRM_BRIDGE_OP_DP_AUDIO;
dp->bridge.of_node = dp->dev->of_node;
dp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
dp->bridge.hdmi_audio_dev = dp->dev;
dp->bridge.hdmi_audio_max_i2s_playback_channels = 8;
dp->bridge.hdmi_audio_spdif_playback = 1;
dp->bridge.hdmi_audio_dai_port = -1;
ret = devm_drm_bridge_add(dev, &dp->bridge);
if (ret)
return ret;
ret = drm_bridge_attach(encoder, &dp->bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret)
return ret;
connector = drm_bridge_connector_init(drm_dev, encoder);
if (IS_ERR(connector)) {
ret = PTR_ERR(connector);
dev_err(dp->dev, "failed to init bridge connector: %d\n", ret);
return ret;
}
for (i = 0; i < dp->ports; i++) {
port = dp->port[i];
port->event_nb.notifier_call = cdn_dp_pd_event;
ret = devm_extcon_register_notifier(dp->dev, port->extcon,
EXTCON_DISP_DP,
&port->event_nb);
if (ret) {
DRM_DEV_ERROR(dev,
"register EXTCON_DISP_DP notifier err\n");
return ret;
}
}
pm_runtime_enable(dev);
schedule_work(&dp->event_work);
return 0;
}
static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
{
struct cdn_dp_device *dp = dev_get_drvdata(dev);
struct drm_encoder *encoder = &dp->encoder.encoder;
cancel_work_sync(&dp->event_work);
encoder->funcs->destroy(encoder);
pm_runtime_disable(dev);
if (dp->fw_loaded)
release_firmware(dp->fw);
}
static const struct component_ops cdn_dp_component_ops = {
.bind = cdn_dp_bind,
.unbind = cdn_dp_unbind,
};
static int cdn_dp_suspend(struct device *dev)
{
struct cdn_dp_device *dp = dev_get_drvdata(dev);
int ret = 0;
mutex_lock(&dp->lock);
if (dp->active)
ret = cdn_dp_disable(dp);
dp->suspended = true;
mutex_unlock(&dp->lock);
return ret;
}
static __maybe_unused int cdn_dp_resume(struct device *dev)
{
struct cdn_dp_device *dp = dev_get_drvdata(dev);
mutex_lock(&dp->lock);
dp->suspended = false;
if (dp->fw_loaded)
schedule_work(&dp->event_work);
mutex_unlock(&dp->lock);
return 0;
}
static int cdn_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct of_device_id *match;
struct cdn_dp_data *dp_data;
struct cdn_dp_port *port;
struct cdn_dp_device *dp;
struct extcon_dev *extcon;
struct phy *phy;
int ret;
int i;
dp = devm_drm_bridge_alloc(dev, struct cdn_dp_device, bridge,
&cdn_dp_bridge_funcs);
if (IS_ERR(dp))
return PTR_ERR(dp);
dp->dev = dev;
match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
dp_data = (struct cdn_dp_data *)match->data;
for (i = 0; i < dp_data->max_phy; i++) {
extcon = extcon_get_edev_by_phandle(dev, i);
phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
if (PTR_ERR(extcon) == -EPROBE_DEFER ||
PTR_ERR(phy) == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (IS_ERR(extcon) || IS_ERR(phy))
continue;
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
if (!port)
return -ENOMEM;
port->extcon = extcon;
port->phy = phy;
port->dp = dp;
port->id = i;
dp->port[dp->ports++] = port;
}
if (!dp->ports) {
DRM_DEV_ERROR(dev, "missing extcon or phy\n");
return -EINVAL;
}
mutex_init(&dp->lock);
dev_set_drvdata(dev, dp);
ret = component_add(dev, &cdn_dp_component_ops);
if (ret)
return ret;
return 0;
}
static void cdn_dp_remove(struct platform_device *pdev)
{
struct cdn_dp_device *dp = platform_get_drvdata(pdev);
platform_device_unregister(dp->audio_pdev);
cdn_dp_suspend(dp->dev);
component_del(&pdev->dev, &cdn_dp_component_ops);
}
static void cdn_dp_shutdown(struct platform_device *pdev)
{
struct cdn_dp_device *dp = platform_get_drvdata(pdev);
cdn_dp_suspend(dp->dev);
}
static const struct dev_pm_ops cdn_dp_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
cdn_dp_resume)
};
struct platform_driver cdn_dp_driver = {
.probe = cdn_dp_probe,
.remove = cdn_dp_remove,
.shutdown = cdn_dp_shutdown,
.driver = {
.name = "cdn-dp",
.of_match_table = cdn_dp_dt_ids,
.pm = &cdn_dp_pm_ops,
},
};
