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8299d1f057
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
79 lines
2.1 KiB
Diff
79 lines
2.1 KiB
Diff
From 263d69b2c6ff1d1de6c3788d1b01760d4a1ebd9d Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Thu, 29 Apr 2021 11:08:52 +0200
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Subject: [PATCH] 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
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be an issue when we connect/disconnect a display quickly or the device
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on the other end only issues a hotplug pulse (for example on EDID
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change).
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Switch the driver to rely on the internal controller logic for the
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BCM2711/RPi4.
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_hdmi.c | 44 ++++++++++++++++++++++++++++++++++
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1 file changed, 44 insertions(+)
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--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
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+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -1689,6 +1689,46 @@ static int vc4_hdmi_audio_init(struct vc
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}
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+static irqreturn_t vc4_hdmi_hpd_irq_thread(int irq, void *priv)
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+{
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+ struct vc4_hdmi *vc4_hdmi = priv;
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+ struct drm_device *dev = vc4_hdmi->connector.dev;
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+
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+ if (dev)
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+ drm_kms_helper_hotplug_event(dev);
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+
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+ return IRQ_HANDLED;
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+}
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+
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+static int vc4_hdmi_hotplug_init(struct vc4_hdmi *vc4_hdmi)
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+{
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+ struct platform_device *pdev = vc4_hdmi->pdev;
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+ struct device *dev = &pdev->dev;
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+ int ret;
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+
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+ if (vc4_hdmi->variant->external_irq_controller) {
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+ ret = devm_request_threaded_irq(dev,
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+ platform_get_irq_byname(pdev, "hpd-connected"),
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+ NULL,
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+ vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT,
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+ "vc4 hdmi hpd connected", vc4_hdmi);
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+ if (ret)
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+ return ret;
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+
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+ ret = devm_request_threaded_irq(dev,
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+ platform_get_irq_byname(pdev, "hpd-removed"),
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+ NULL,
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+ vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT,
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+ "vc4 hdmi hpd disconnected", vc4_hdmi);
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+ if (ret)
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+ return ret;
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+
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+ connector->polled = DRM_CONNECTOR_POLL_HPD;
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+ }
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+
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+ return 0;
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+}
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+
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#ifdef CONFIG_DRM_VC4_HDMI_CEC
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static irqreturn_t vc4_cec_irq_handler_rx_thread(int irq, void *priv)
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{
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@@ -2303,6 +2343,10 @@ static int vc4_hdmi_bind(struct device *
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if (ret)
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goto err_destroy_encoder;
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+ ret = vc4_hdmi_hotplug_init(vc4_hdmi);
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+ if (ret)
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+ goto err_destroy_conn;
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+
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ret = vc4_hdmi_cec_init(vc4_hdmi);
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if (ret)
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goto err_destroy_conn;
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