diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0601-drm-vc4-hdmi-Rely-on-interrupts-to-handle-hotplug.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0601-drm-vc4-hdmi-Rely-on-interrupts-to-handle-hotplug.patch | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0601-drm-vc4-hdmi-Rely-on-interrupts-to-handle-hotplug.patch b/target/linux/bcm27xx/patches-5.10/950-0601-drm-vc4-hdmi-Rely-on-interrupts-to-handle-hotplug.patch new file mode 100644 index 0000000000..6f0c4fa930 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0601-drm-vc4-hdmi-Rely-on-interrupts-to-handle-hotplug.patch @@ -0,0 +1,78 @@ +From 263d69b2c6ff1d1de6c3788d1b01760d4a1ebd9d Mon Sep 17 00:00:00 2001 +From: Maxime Ripard <maxime@cerno.tech> +Date: Thu, 29 Apr 2021 11:08:52 +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 <maxime@cerno.tech> +--- + drivers/gpu/drm/vc4/vc4_hdmi.c | 44 ++++++++++++++++++++++++++++++++++ + 1 file changed, 44 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c +@@ -1689,6 +1689,46 @@ static int vc4_hdmi_audio_init(struct vc + + } + ++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 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) + { +@@ -2303,6 +2343,10 @@ static int vc4_hdmi_bind(struct device * + 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; |