path: root/drivers/gpu/drm/amd/display/include/dal_types.h
diff options
authorNicholas Kazlauskas <>2018-12-05 12:08:56 -0500
committerAlex Deucher <>2018-12-18 17:39:42 -0500
commit180db303ff466a3887c841e805568b92233e2d0e (patch)
tree5051068334f6c4c47c26b4773be43957440f344d /drivers/gpu/drm/amd/display/include/dal_types.h
parent8cd61c313d8b5a813a38b615796ea50563f3afae (diff)
drm/amd/display: Add below the range support for FreeSync
[Why] When the flip-rate is below the minimum supported variable refresh rate range for the monitor the front porch wait will timeout and be frequently misaligned resulting in stuttering and/or flickering. The FreeSync module can still maintain a smooth and flicker free image when the monitor has a refresh rate range such that the maximum refresh > 2 * minimum refresh by utilizing low framerate compensation, "below the range". [How] Hook up the pre-flip and post-flip handlers from the FreeSync module. These adjust the minimum/maximum vrr range to duplicate frames when appropriate by tracking flip timestamps. Signed-off-by: Nicholas Kazlauskas <> Acked-by: Leo Li <> Reviewed-by: Harry Wentland <> Signed-off-by: Alex Deucher <>
Diffstat (limited to 'drivers/gpu/drm/amd/display/include/dal_types.h')
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