I believe you're thinking of: https://patchwork.freedesktop.org/patch/77191/ https://patchwork.freedesktop.org/patch/77192/
Although they don't test for multiple rotation values...
- [PATCH 5/7] drm/i915: Use & instead... Joonas Lahtinen
- [PATCH 5/7] drm/i915: Use & ins... Ville Syrjälä
- [PATCH 6/7] drm/i915: Clean up rotation DSPC... ville.syrj...@linux.intel.com
- [PATCH 6/7] drm/i915: Clean up rotation... Chris Wilson
- [PATCH 6/7] drm/i915: Clean up rotation... Joonas Lahtinen
- [PATCH 7/7] drm/i915: Add horizontal mirrori... ville.syrj...@linux.intel.com
- [PATCH 7/7] drm/i915: Add horizontal mi... Joonas Lahtinen
- [PATCH i-g-t] tests/kms_rotation_crc: Add ba... ville.syrj...@linux.intel.com
- [PATCH i-g-t] tests/kms_rotation_crc: A... Joonas Lahtinen
- [PATCH i-g-t] tests/kms_rotation_cr... Ville Syrjälä
- [Intel-gfx] [PATCH i-g-t] tests... Matthew Auld
- [Intel-gfx] [PATCH i-g-t] t... Ville Syrjälä
