[hwc] drm_hwcomposer: fix return values for ValidateDisplay

Message ID 20171009160604.24008-1-robh@kernel.org
State New
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Series
  • [hwc] drm_hwcomposer: fix return values for ValidateDisplay
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Commit Message

Rob Herring Oct. 9, 2017, 4:06 p.m.
According to the API documentation, if we've set num_types, then the
return value should be HWC2::Error::HasChanges.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 drmhwctwo.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/drmhwctwo.cpp b/drmhwctwo.cpp
index 89399bf1ba33..0f258770a8bb 100644
--- a/drmhwctwo.cpp
+++ b/drmhwctwo.cpp
@@ -701,7 +701,7 @@  HWC2::Error DrmHwcTwo::HwcDisplay::ValidateDisplay(uint32_t *num_types,
         break;
     }
   }
-  return HWC2::Error::None;
+  return *num_types ? HWC2::Error::HasChanges : HWC2::Error::None;
 }
 
 HWC2::Error DrmHwcTwo::HwcLayer::SetCursorPosition(int32_t x, int32_t y) {