From 1398958cfd8d331342d657d37151791dd7256b40 Mon Sep 17 00:00:00 2001 From: Nicholas Kazlauskas Date: Thu, 4 Oct 2018 11:46:07 -0400 Subject: drm: Add vrr_enabled property to drm CRTC This patch introduces the 'vrr_enabled' CRTC property to allow dynamic control over variable refresh rate support for a CRTC. This property should be treated like a content hint to the driver - if the hardware or driver is not capable of driving variable refresh timings then this is not considered an error. Capability for variable refresh rate support should be determined by querying the vrr_capable drm connector property. It is worth noting that while the property is intended for atomic use it isn't filtered from legacy userspace queries. This allows for Xorg userspace drivers to implement support. Signed-off-by: Nicholas Kazlauskas Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher --- include/drm/drm_crtc.h | 9 +++++++++ include/drm/drm_mode_config.h | 5 +++++ 2 files changed, 14 insertions(+) (limited to 'include/drm') diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index b21437bc95bf..39c3900aab3c 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -290,6 +290,15 @@ struct drm_crtc_state { */ u32 pageflip_flags; + /** + * @vrr_enabled: + * + * Indicates if variable refresh rate should be enabled for the CRTC. + * Support for the requested vrr state will depend on driver and + * hardware capabiltiy - lacking support is not treated as failure. + */ + bool vrr_enabled; + /** * @event: * diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index 5dbeabdbaf91..9db59a1caf5b 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -645,6 +645,11 @@ struct drm_mode_config { * connectors must be of and active must be set to disabled, too. */ struct drm_property *prop_mode_id; + /** + * @prop_vrr_enabled: Default atomic CRTC property to indicate + * whether variable refresh rate should be enabled on the CRTC. + */ + struct drm_property *prop_vrr_enabled; /** * @dvi_i_subconnector_property: Optional DVI-I property to -- cgit v1.2.3