Add patch for bcm2837 (RPi3) HDMI EDID detection
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@ -152,3 +152,40 @@ index 0000000..8216bbb
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--
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2.9.3
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2.9.3
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From accfa15f3aef0dfca46d0eee02c1846c9b230fd5 Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Wed, 14 Sep 2016 19:21:29 +0100
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Subject: [PATCH] drm/vc4: Fall back to using an EDID probe in the absence of a
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GPIO.
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On Pi0/1/2, we use an external GPIO line for hotplug detection, since
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the HDMI_HOTPLUG register isn't connected to anything. However, with
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the Pi3 the HPD GPIO line has moved off to a GPIO expander that will
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be tricky to get to (the firmware is constantly polling the expander
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using i2c0, so we'll need to coordinate with it).
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As a stop-gap, if we don't have a GPIO line, use an EDID probe to
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detect connection. Fixes HDMI display on the pi3.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/vc4_hdmi.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
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index 4452f36..5adc0c7 100644
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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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@@ -174,6 +174,9 @@ vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
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return connector_status_disconnected;
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}
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+ if (drm_probe_ddc(vc4->hdmi->ddc))
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+ return connector_status_connected;
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+
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if (HDMI_READ(VC4_HDMI_HOTPLUG) & VC4_HDMI_HOTPLUG_CONNECTED)
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return connector_status_connected;
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else
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--
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2.9.3
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@ -2153,6 +2153,9 @@ fi
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#
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#
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#
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#
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%changelog
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%changelog
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* Thu Sep 15 2016 Peter Robinson <pbrobinson@fedoraproject.org>
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- Add patch for bcm2837 (RPi3) HDMI EDID detection
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* Wed Sep 14 2016 Justin M. Forbes <jforbes@fedoraproject.org> - 4.8.0-0.rc6.git2.1
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* Wed Sep 14 2016 Justin M. Forbes <jforbes@fedoraproject.org> - 4.8.0-0.rc6.git2.1
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- Linux v4.8-rc6-211-g77e5bdf
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- Linux v4.8-rc6-211-g77e5bdf
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