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drm/vc4: hdmi: Rely on interrupts to handle hotplug

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DRM currently polls for the HDMI connector status every 10s, which can
be an issue when we connect/disconnect a display quickly or the device
on the other end only issues a hotplug pulse (for example on EDID
change).

Switch the driver to rely on the internal controller logic for the
BCM2711/RPi4.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210524132018.264396-1-maxime@cerno.tech
This commit is contained in:
Maxime Ripard 2021-05-24 15:20:18 +02:00
parent ad5fd900a6
commit f4790083c7
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GPG key ID: E3EF0D6F671851C5
1 changed files with 45 additions and 0 deletions
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45
drivers/gpu/drm/vc4/vc4_hdmi.c
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@ -1621,6 +1621,47 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
}
static irqreturn_t vc4_hdmi_hpd_irq_thread(int irq, void *priv)
{
struct vc4_hdmi *vc4_hdmi = priv;
struct drm_device *dev = vc4_hdmi->connector.dev;
if (dev)
drm_kms_helper_hotplug_event(dev);
return IRQ_HANDLED;
}
static int vc4_hdmi_hotplug_init(struct vc4_hdmi *vc4_hdmi)
{
struct drm_connector *connector = &vc4_hdmi->connector;
struct platform_device *pdev = vc4_hdmi->pdev;
struct device *dev = &pdev->dev;
int ret;
if (vc4_hdmi->variant->external_irq_controller) {
ret = devm_request_threaded_irq(dev,
platform_get_irq_byname(pdev, "hpd-connected"),
NULL,
vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT,
"vc4 hdmi hpd connected", vc4_hdmi);
if (ret)
return ret;
ret = devm_request_threaded_irq(dev,
platform_get_irq_byname(pdev, "hpd-removed"),
NULL,
vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT,
"vc4 hdmi hpd disconnected", vc4_hdmi);
if (ret)
return ret;
connector->polled = DRM_CONNECTOR_POLL_HPD;
}
return 0;
}
#ifdef CONFIG_DRM_VC4_HDMI_CEC
static irqreturn_t vc4_cec_irq_handler_rx_thread(int irq, void *priv)
{
@ -2179,6 +2220,10 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
if (ret)
goto err_destroy_encoder;
ret = vc4_hdmi_hotplug_init(vc4_hdmi);
if (ret)
goto err_destroy_conn;
ret = vc4_hdmi_cec_init(vc4_hdmi);
if (ret)
goto err_destroy_conn;