drm: sync the mode validation for INTERLACE/DBLSCAN
Check whether the INTERLACE/DBLSCAN is supported by output device. If
not, the mode containing the flag of INTERLACE/DBLSCAN will be marked
as unsupported.
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 1c3a8c5..4c93b7b 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -42,6 +42,26 @@
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
};
+static void drm_mode_validate_flag(struct drm_connector *connector,
+ int flags)
+{
+ struct drm_display_mode *mode, *t;
+
+ if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
+ return;
+
+ list_for_each_entry_safe(mode, t, &connector->modes, head) {
+ if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
+ !(flags & DRM_MODE_FLAG_INTERLACE))
+ mode->status = MODE_NO_INTERLACE;
+ if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
+ !(flags & DRM_MODE_FLAG_DBLSCAN))
+ mode->status = MODE_NO_DBLESCAN;
+ }
+
+ return;
+}
+
/**
* drm_helper_probe_connector_modes - get complete set of display modes
* @dev: DRM device
@@ -72,6 +92,7 @@
struct drm_connector_helper_funcs *connector_funcs =
connector->helper_private;
int count = 0;
+ int mode_flags = 0;
DRM_DEBUG("%s\n", drm_get_connector_name(connector));
/* set all modes to the unverified state */
@@ -96,6 +117,13 @@
if (maxX && maxY)
drm_mode_validate_size(dev, &connector->modes, maxX,
maxY, 0);
+
+ if (connector->interlace_allowed)
+ mode_flags |= DRM_MODE_FLAG_INTERLACE;
+ if (connector->doublescan_allowed)
+ mode_flags |= DRM_MODE_FLAG_DBLSCAN;
+ drm_mode_validate_flag(connector, mode_flags);
+
list_for_each_entry_safe(mode, t, &connector->modes, head) {
if (mode->status == MODE_OK)
mode->status = connector_funcs->mode_valid(connector,