brain-hackers_pepepper-mirror
/
linux-brain
mirror of https://github.com/brain-hackers/linux-brain.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm: bridge: cadence: Add support for periodically poll the connector 

Normally, DP/HDMI PHY use HPD_IRQ to monitor the connector connection
status, but LS1028A doesn't support HPD_IRQ signals response.

This patch allows periodically poll the connector for connection and
disconnection.

Signed-off-by: Wen He <wen.he_1@nxp.com>
This commit is contained in:
Wen He 2019-09-18 11:05:31 +08:00 committed by Dong Aisheng
parent e04d199413
commit 560e6e4066
2 changed files with 54 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
drivers/gpu/drm/bridge/cadence/cdns-dp-core.c
View File

@ -276,7 +276,11 @@ static int cdns_dp_bridge_attach(struct drm_bridge *bridge)
connector->interlace_allowed = 1;
connector->polled = DRM_CONNECTOR_POLL_HPD;
if (mhdp->is_hpd)
connector->polled = DRM_CONNECTOR_POLL_HPD;
else
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
drm_connector_helper_add(connector, &cdns_dp_connector_helper_funcs);
@ -439,22 +443,34 @@ static int __cdns_dp_probe(struct platform_device *pdev,
INIT_DELAYED_WORK(&mhdp->hotplug_work, hotplug_work_func);
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mhdp->regs_base = devm_ioremap(dev, iores->start, resource_size(iores));
if (IS_ERR(mhdp->regs_base))
return -ENOMEM;
if (iores) {
mhdp->regs_base = devm_ioremap(dev, iores->start,
resource_size(iores));
if (IS_ERR(mhdp->regs_base))
return -ENOMEM;
}
iores = platform_get_resource(pdev, IORESOURCE_MEM, 1);
mhdp->regs_sec = devm_ioremap(dev, iores->start, resource_size(iores));
if (IS_ERR(mhdp->regs_sec))
return -ENOMEM;
if (iores) {
mhdp->regs_sec = devm_ioremap(dev, iores->start,
resource_size(iores));
if (IS_ERR(mhdp->regs_sec))
return -ENOMEM;
}
mhdp->is_hpd = true;
mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in");
if (mhdp->irq[IRQ_IN] < 0)
if (mhdp->irq[IRQ_IN] < 0) {
mhdp->is_hpd = false;
dev_info(dev, "No plug_in irq number\n");
}
mhdp->irq[IRQ_OUT] = platform_get_irq_byname(pdev, "plug_out");
if (mhdp->irq[IRQ_OUT] < 0)
if (mhdp->irq[IRQ_OUT] < 0) {
mhdp->is_hpd = false;
dev_info(dev, "No plug_out irq number\n");
}
cdns_dp_parse_dt(mhdp);
@ -474,32 +490,36 @@ static int __cdns_dp_probe(struct platform_device *pdev,
cdns_mhdp_plat_call(mhdp, phy_set);
/* Enable Hotplug Detect IRQ thread */
irq_set_status_flags(mhdp->irq[IRQ_IN], IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_IN],
NULL, cdns_dp_irq_thread,
IRQF_ONESHOT, dev_name(dev),
mhdp);
if (ret) {
dev_err(dev, "can't claim irq %d\n",
mhdp->irq[IRQ_IN]);
return -EINVAL;
}
if (mhdp->is_hpd) {
irq_set_status_flags(mhdp->irq[IRQ_IN], IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_IN],
NULL, cdns_dp_irq_thread,
IRQF_ONESHOT, dev_name(dev),
mhdp);
irq_set_status_flags(mhdp->irq[IRQ_OUT], IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_OUT],
NULL, cdns_dp_irq_thread,
IRQF_ONESHOT, dev_name(dev),
mhdp);
if (ret) {
dev_err(dev, "can't claim irq %d\n",
mhdp->irq[IRQ_OUT]);
return -EINVAL;
}
if (ret) {
dev_err(dev, "can't claim irq %d\n",
mhdp->irq[IRQ_IN]);
return -EINVAL;
}
if (cdns_mhdp_read_hpd(mhdp))
enable_irq(mhdp->irq[IRQ_OUT]);
else
enable_irq(mhdp->irq[IRQ_IN]);
irq_set_status_flags(mhdp->irq[IRQ_OUT], IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_OUT],
NULL, cdns_dp_irq_thread,
IRQF_ONESHOT, dev_name(dev),
mhdp);
if (ret) {
dev_err(dev, "can't claim irq %d\n",
mhdp->irq[IRQ_OUT]);
return -EINVAL;
}
if (cdns_mhdp_read_hpd(mhdp))
enable_irq(mhdp->irq[IRQ_OUT]);
else
enable_irq(mhdp->irq[IRQ_IN]);
}
mhdp->bridge.base.driver_private = mhdp;
mhdp->bridge.base.funcs = &cdns_dp_bridge_funcs;

1
include/drm/bridge/cdns-mhdp-common.h
View File

@ -683,6 +683,7 @@ struct cdns_mhdp_device {
bool link_up;
bool power_up;
bool plugged;
bool is_hpd;
struct mutex lock;
int irq[IRQ_NUM];