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drm/bridge: ti-tfp410: Fall back to HPD polling if HPD irq is not available 

In case either the HPD gpio is not specified or when the HPD gpio can not
be used as interrupt we should tell the core that the HPD needs to be
polled for detecting hotplug.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190401123342.15767-1-peter.ujfalusi@ti.com
This commit is contained in:
Peter Ujfalusi 2019-04-01 15:33:42 +03:00 committed by Andrzej Hajda
parent beb941b970
commit 3d31e21522
1 changed files with 11 additions and 3 deletions
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14
drivers/gpu/drm/bridge/ti-tfp410.c
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@ -31,6 +31,7 @@ struct tfp410 {
struct i2c_adapter *ddc;
struct gpio_desc *hpd;
int hpd_irq;
struct delayed_work hpd_work;
struct gpio_desc *powerdown;
@ -124,8 +125,10 @@ static int tfp410_attach(struct drm_bridge *bridge)
return -ENODEV;
}
if (dvi->hpd)
if (dvi->hpd_irq >= 0)
dvi->connector.polled = DRM_CONNECTOR_POLL_HPD;
else
dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
drm_connector_helper_add(&dvi->connector,
&tfp410_con_helper_funcs);
@ -324,10 +327,15 @@ static int tfp410_init(struct device *dev, bool i2c)
return PTR_ERR(dvi->powerdown);
}
if (dvi->hpd) {
if (dvi->hpd)
dvi->hpd_irq = gpiod_to_irq(dvi->hpd);
else
dvi->hpd_irq = -ENXIO;
if (dvi->hpd_irq >= 0) {
INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func);
ret = devm_request_threaded_irq(dev, gpiod_to_irq(dvi->hpd),
ret = devm_request_threaded_irq(dev, dvi->hpd_irq,
NULL, tfp410_hpd_irq_thread, IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"hdmi-hpd", dvi);