DRM database property: VRR_ENABLED

Back to index

Details

Name
VRR_ENABLED
Flags
<none>
Type
range
Attached to
CRTC
Specification
[0, 1]

Documentation

Default &drm_crtc boolean property that notifies the driver that the
content on the CRTC is suitable for variable refresh rate presentation.
The driver will take this property as a hint to enable variable
refresh rate support if the receiver supports it, ie. if the
"vrr_capable" property is true on the &drm_connector object. The
vertical front porch duration will be extended until page-flip or
timeout when enabled.

The minimum vertical front porch duration is defined as the vertical
front porch duration for the current mode.

The maximum vertical front porch duration is greater than or equal to
the minimum vertical front porch duration. The duration is derived
from the minimum supported variable refresh rate for the connector.

The driver may place further restrictions within these minimum
and maximum bounds.

Driver support

✓ adp
✓ amdgpu
✓ apple
✓ ast
✓ bochs-drm
✓ drm-rp1-dsi
✓ evdi
✓ exynos
✗ gma500
✓ i915
✓ imx-dcss
✓ imx-drm
✓ imx-lcdif
✓ kirin
✓ mediatek
✓ meson
✓ msm
✓ mxsfb-drm
✓ nouveau
✓ nvidia-drm
✓ omapdrm
✓ panel-mipi-dbi
✗ pvr
✓ qxl
✗ radeon
✓ rcar-du
✓ rockchip
✓ simpledrm
✓ starfive
✓ sun4i-drm
✓ sunxi-drm
✓ tegra
✓ tilcdc
✓ vboxvideo
✓ vc4
✓ virtio_gpu
✓ vkms
✓ vmwgfx
✓ xe
✓ xlnx