[PATCH] Reject plane sizes more than 4K for ICL (experimental fix for suspicious crc problems)

Stanislav Lisovskiy stanislav.lisovskiy at intel.com
Fri Jan 11 14:57:46 UTC 2019


Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108336

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bbc19d5341be..63d87b675245 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12728,6 +12728,18 @@ static int intel_atomic_check(struct drm_device *dev,
 	if (ret)
 		return ret;
 
+
+	if (IS_ICELAKE(dev_priv)) {
+			for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
+				if (new_plane_state->crtc_w >= 4096 ||
+				    new_plane_state->crtc_x >= 4096 ||
+				    new_plane_state->crtc_h >= 4096 ||
+				    new_plane_state->crtc_y >= 4096) {
+					return -ERANGE;
+				}
+			}
+	}
+
 	intel_fbc_choose_crtc(dev_priv, intel_state);
 
 	return calc_watermark_data(intel_state);;
-- 
2.17.1



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