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From 354bf89fd678a6da6256a6ac37440c27c3b62e80 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Tue, 30 Jun 2020 18:04:13 +0100
Subject: [PATCH] drm/vc4: Allow interlaced HDMI modes from FKMS.
Having checked the firmware handling for interlaced modes,
it appears to be possible to support interlaced modes on
HDMI without adverse side effects, so do so.
https://github.com/raspberrypi/linux/issues/3694
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/gpu/drm/vc4/vc4_firmware_kms.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
@@ -936,6 +936,9 @@ static void vc4_crtc_mode_set_nofb(struc
break;
}
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ mb.timings.flags |= TIMINGS_FLAGS_INTERLACE;
+
mb.timings.video_id_code = frame.avi.video_code;
if (!vc4_encoder->hdmi_monitor) {
@@ -1632,7 +1635,7 @@ vc4_fkms_connector_init(struct drm_devic
DRM_MODE_CONNECTOR_HDMIA);
drm_connector_helper_add(connector,
&vc4_fkms_connector_helper_funcs);
- connector->interlace_allowed = 0;
+ connector->interlace_allowed = 1;
}
ret = drm_mode_create_tv_margin_properties(dev);
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