[igt-dev] [PATCH 0/2] tests/fbdev: Additional tests for resolution and panning

[Thomas Zimmermann]

Add addtional tests for resolution and panning operations on fbdev
devices. Succeed on successful operations. Fail on invalid operations
or state.

DRM's simpledrm driver exposed a bug in DRM's fbdev overallocation code,
[1] which is required for fbdev pageflipping. The new test cases intent
to test panning and page flipping, and detect such issues early.

Tested with the current simpledrm and a hacked version that supports fbdev
overallocation. This will also help to implement the panning functionality
for real in simpledrm and other drivers.

[1] https://lore.kernel.org/dri-devel/20211005070355.7680-1-tzimmermann@suse.de/

Thomas Zimmermann (2):
  tests/fbdev: Test for validity of video mode settings
  tests/fbdev: Add tests for display panning

 tests/fbdev.c | 135 +++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 127 insertions(+), 8 deletions(-)

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2.33.0