Add a drm_mode_set_crtcinfo() call in our CRTC's mode_fixup callback
to ensure that any adjustments to the mode made by connectors etc are
properly accounted for by the CRTC.
Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
---
drivers/gpu/drm/armada/armada_crtc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/armada/armada_crtc.c
b/drivers/gpu/drm/armada/armada_crtc.c
index e81e57823b66..d802a6bc2d9f 100644
--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -180,6 +180,13 @@ static bool armada_drm_crtc_mode_fixup(struct drm_crtc
*crtc,
adj->flags & DRM_MODE_FLAG_INTERLACE)
return false;
+ /*
+ * Set CRTC modesetting parameters for the adjusted mode. This is
+ * applied after the connectors, bridges, and encoders have fixed up
+ * this mode, as described above drm_atomic_helper_check_modeset().
+ */
+ drm_mode_set_crtcinfo(adj, CRTC_INTERLACE_HALVE_V);
+
/* Check whether the display mode is possible */
ret = dcrtc->variant->compute_clock(dcrtc, adj, NULL);
if (ret)
--
2.7.4
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