From f4790083c7c23b419f6a15170556950fd6a884a2 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Mon, 24 May 2021 15:20:18 +0200 Subject: [PATCH] drm/vc4: hdmi: Rely on interrupts to handle hotplug 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 Reviewed-by: Dave Stevenson Link: https://patchwork.freedesktop.org/patch/msgid/20210524132018.264396-1-maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_hdmi.c | 45 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 3c4cc133e3df..971c65a4d823 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -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; -- 2.11.0