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Deleted following upstreamed patches: bcm27xx: 950-0006-drm-vc4-hdmi-Fix-HPD-GPIO-detection.patch bcm27xx: 950-0420-drm-vc4-Adopt-the-dma-configuration-from-the-HVS-or-.patch bcm27xx: 950-0425-drm-vc4-A-present-but-empty-dmas-disables-audio.patch bcm27xx: 950-0432-vc4-drm-Avoid-full-hdmi-audio-fifo-writes.patch bcm27xx: 950-0433-vc4-drm-vc4_plane-Remove-subpixel-positioning-check.patch bcm27xx: 950-0435-drm-vc4-Correct-pixel-order-for-DSI0.patch bcm27xx: 950-0436-drm-vc4-Register-dsi0-as-the-correct-vc4-encoder-typ.patch bcm27xx: 950-0437-drm-vc4-Fix-dsi0-interrupt-support.patch bcm27xx: 950-0438-drm-vc4-Add-correct-stop-condition-to-vc4_dsi_encode.patch bcm27xx: 950-0443-drm-vc4-Fix-timings-for-interlaced-modes.patch bcm27xx: 950-0445-drm-vc4-Fix-margin-calculations-for-the-right-bottom.patch bcm27xx: 950-0475-drm-vc4-Reset-HDMI-MISC_CONTROL-register.patch bcm27xx: 950-0476-drm-vc4-Release-workaround-buffer-and-DMA-in-error-p.patch bcm27xx: 950-0477-drm-vc4-Correct-DSI-divider-calculations.patch bcm27xx: 950-0664-drm-vc4-dsi-Correct-max-divider-to-255-not-7.patch bcm53xx: 072-next-ARM_dts_BCM53015-add-mr26.patch mediatek: 920-linux-next-dts-mt7622-bpi-r64-fix-wps-button.patch Manually rebased following patches: bcm27xx: 950-0004-drm-vc4-hdmi-Remove-the-DDC-probing-for-status-detec.patch bcm27xx: 950-0700-net-phy-lan87xx-Decrease-phy-polling-rate.patch bcm27xx: 950-0711-drm-vc4-Rename-bridge-to-out_bridge.patch bcm27xx: 950-0713-drm-vc4-Remove-splitting-the-bridge-chain-from-the-d.patch bcm27xx: 950-0715-drm-vc4-Convert-vc4_dsi-to-using-a-bridge-instead-of.patch bcm27xx: 950-0787-vc4-drm-vc4_plane-Keep-fractional-source-coords-insi.patch bcm27xx: 950-0914-mmc-block-Don-t-do-single-sector-reads-during-recove.patch Runtime tested on turris-omnia and glinet-b1300. Tested-by: John Audia <therealgraysky@proton.me> [bcm2711/RPi4B, mt7622/RT3200] Signed-off-by: Petr Štetiar <ynezz@true.cz>
61 lines
2.6 KiB
Diff
61 lines
2.6 KiB
Diff
From b30b747d76946fb176bb4b044c830415d551b7bb Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Thu, 19 Aug 2021 13:50:12 +0200
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Subject: [PATCH] drm/vc4: hdmi: Actually check for the connector
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status in hotplug
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The drm_helper_hpd_irq_event() documentation states that this function
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is "useful for drivers which can't or don't track hotplug interrupts for
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each connector." and that "Drivers which support hotplug interrupts for
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each connector individually and which have a more fine-grained detect
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logic should bypass this code and directly call
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drm_kms_helper_hotplug_event()". This is thus what we ended-up doing.
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However, what this actually means, and is further explained in the
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drm_kms_helper_hotplug_event() documentation, is that
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drm_kms_helper_hotplug_event() should be called by drivers that can
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track the connection status change, and if it has changed we should call
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that function.
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This underlying expectation we failed to provide is that the caller of
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drm_kms_helper_hotplug_event() should call drm_helper_probe_detect() to
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probe the new status of the connector.
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Since we didn't do it, it meant that even though we were sending the
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notification to user-space and the DRM clients that something changed we
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never probed or updated our internal connector status ourselves.
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This went mostly unnoticed since the detect callback usually doesn't
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have any side-effect. Also, if we were using the DRM fbdev emulation
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(which is a DRM client), or any user-space application that can deal
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with hotplug events, chances are they would react to the hotplug event
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by probing the connector status eventually.
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However, now that we have to enable the scrambler in detect() if it was
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enabled it has a side effect, and an application such as Kodi or
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modetest doesn't deal with hotplug events. This resulted with a black
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screen when Kodi or modetest was running when a screen was disconnected
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and then reconnected, or switched off and on.
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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 | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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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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@@ -1801,10 +1801,11 @@ static void vc4_hdmi_audio_exit(struct v
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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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+ struct drm_connector *connector = &vc4_hdmi->connector;
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+ struct drm_device *dev = connector->dev;
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if (dev && dev->registered)
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- drm_kms_helper_hotplug_event(dev);
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+ drm_connector_helper_hpd_irq_event(connector);
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return IRQ_HANDLED;
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}
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