Maybe this make someone happy, because I'm pretty sure interlaced on
sdvo won't work without this.

Signed-Off-by: Daniel Vetter <[email protected]>
---
 drivers/gpu/drm/i915/intel_sdvo.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c 
b/drivers/gpu/drm/i915/intel_sdvo.c
index 457329c..413da30 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -778,6 +778,8 @@ static void intel_sdvo_get_dtd_from_mode(struct 
intel_sdvo_dtd *dtd,
                ((v_sync_len & 0x30) >> 4);
 
        dtd->part2.dtd_flags = 0x18;
+       if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+               dtd->part2.dtd_flags |= 0x1;
        if (mode->flags & DRM_MODE_FLAG_PHSYNC)
                dtd->part2.dtd_flags |= 0x2;
        if (mode->flags & DRM_MODE_FLAG_PVSYNC)
@@ -815,6 +817,8 @@ static void intel_sdvo_get_mode_from_dtd(struct 
drm_display_mode * mode,
        mode->clock = dtd->part1.clock * 10;
 
        mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
+       if (dtd->part2.dtd_flags & 0x1)
+               mode->flags |= DRM_MODE_FLAG_INTERLACE;
        if (dtd->part2.dtd_flags & 0x2)
                mode->flags |= DRM_MODE_FLAG_PHSYNC;
        if (dtd->part2.dtd_flags & 0x4)
-- 
1.7.10

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