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-rw-r--r--drivers/gpu/drm/i915/intel_tv.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index a43c98e3f077..da4ab4dc1630 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1490,6 +1490,27 @@ static struct input_res {
{"1920x1080", 1920, 1080},
};
+/*
+ * Chose preferred mode according to line number of TV format
+ */
+static void
+intel_tv_chose_preferred_modes(struct drm_connector *connector,
+ struct drm_display_mode *mode_ptr)
+{
+ struct intel_output *intel_output = to_intel_output(connector);
+ const struct tv_mode *tv_mode = intel_tv_mode_find(intel_output);
+
+ if (tv_mode->nbr_end < 480 && mode_ptr->vdisplay == 480)
+ mode_ptr->type |= DRM_MODE_TYPE_PREFERRED;
+ else if (tv_mode->nbr_end > 480) {
+ if (tv_mode->progressive == true && tv_mode->nbr_end < 720) {
+ if (mode_ptr->vdisplay == 720)
+ mode_ptr->type |= DRM_MODE_TYPE_PREFERRED;
+ } else if (mode_ptr->vdisplay == 1080)
+ mode_ptr->type |= DRM_MODE_TYPE_PREFERRED;
+ }
+}
+
/**
* Stub get_modes function.
*
@@ -1544,6 +1565,7 @@ intel_tv_get_modes(struct drm_connector *connector)
mode_ptr->clock = (int) tmp;
mode_ptr->type = DRM_MODE_TYPE_DRIVER;
+ intel_tv_chose_preferred_modes(connector, mode_ptr);
drm_mode_probed_add(connector, mode_ptr);
count++;
}
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