From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Since gen3 can't handle >1024 wide sources with vertical scaling
let's not advertize such modes in the mode list. Less tempetation
to the user to try out things that won't work.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_tv.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 7099d837e31a..89c537839273 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1738,6 +1738,7 @@ intel_tv_set_mode_type(struct drm_display_mode *mode,
static int
intel_tv_get_modes(struct drm_connector *connector)
{
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
const struct tv_mode *tv_mode = intel_tv_mode_find(connector->state);
int i, count = 0;
@@ -1750,6 +1751,11 @@ intel_tv_get_modes(struct drm_connector *connector)
!tv_mode->component_only)
continue;
+ /* no vertical scaling with wide sources on gen3 */
+ if (IS_GEN3(dev_priv) && input->w > 1024 &&
+ input->h > intel_tv_mode_vdisplay(tv_mode))
+ continue;
+
mode = drm_mode_create(connector->dev);
if (!mode)
continue;
--
2.18.1
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