drm/vc4: Fix handling of interlaced video modes.
We must not apply CRTC_INTERLACE_HALVE_V to interlaced modes during
mode enumeration, as drm_helper_probe_single_connector_modes
does, so wrap it and reset the effect of CRTC_INTERLACE_HALVE_V
on affected interlaced modes.
Also mode_fixup interlaced modes passed in from user space.
This fixes the vblank timestamping constants and entries in
the mode->crtc_xxx fields needed for precise vblank timestamping.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 4452f36..68ad106 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -208,10 +208,35 @@
return ret;
}
+/*
+ * drm_helper_probe_single_connector_modes() applies drm_mode_set_crtcinfo to
+ * all modes with flag CRTC_INTERLACE_HALVE_V. We don't want this, as it
+ * screws up vblank timestamping for interlaced modes, so fix it up.
+ */
+static int vc4_hdmi_connector_probe_modes(struct drm_connector *connector,
+ uint32_t maxX, uint32_t maxY)
+{
+ struct drm_display_mode *mode;
+ int count;
+
+ count = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
+ if (count == 0)
+ return 0;
+
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed adapted modes :\n",
+ connector->base.id, connector->name);
+ list_for_each_entry(mode, &connector->modes, head) {
+ drm_mode_set_crtcinfo(mode, 0);
+ drm_mode_debug_printmodeline(mode);
+ }
+
+ return count;
+}
+
static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.detect = vc4_hdmi_connector_detect,
- .fill_modes = drm_helper_probe_single_connector_modes,
+ .fill_modes = vc4_hdmi_connector_probe_modes,
.destroy = vc4_hdmi_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
@@ -246,7 +271,7 @@
connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT);
- connector->interlace_allowed = 0;
+ connector->interlace_allowed = 1;
connector->doublescan_allowed = 0;
drm_mode_connector_attach_encoder(connector, encoder);