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 --- drivers/gpu/drm/drm_atomic_uapi.c | 4 ++++ drivers/gpu/drm/drm_crtc.c | 2 ++ drivers/gpu/drm/drm_mode_config.c | 6 ++++++ 3 files changed, 12 insertions(+) (limited to 'drivers/gpu/drm') diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c index d5b7f315098c..eec396a57b88 100644 --- a/drivers/gpu/drm/drm_atomic_uapi.c +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -433,6 +433,8 @@ static int drm_atomic_crtc_set_property(struct drm_crtc *crtc, ret = drm_atomic_set_mode_prop_for_crtc(state, mode); drm_property_blob_put(mode); return ret; + } else if (property == config->prop_vrr_enabled) { + state->vrr_enabled = val; } else if (property == config->degamma_lut_property) { ret = drm_atomic_replace_property_blob_from_id(dev, &state->degamma_lut, @@ -491,6 +493,8 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc, *val = state->active; else if (property == config->prop_mode_id) *val = (state->mode_blob) ? state->mode_blob->base.id : 0; + else if (property == config->prop_vrr_enabled) + *val = state->vrr_enabled; else if (property == config->degamma_lut_property) *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; else if (property == config->ctm_property) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 268a182ae189..6f8ddfcfaba5 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -340,6 +340,8 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); drm_object_attach_property(&crtc->base, config->prop_out_fence_ptr, 0); + drm_object_attach_property(&crtc->base, + config->prop_vrr_enabled, 0); } return 0; diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c index ee80788f2c40..5670c67f28d4 100644 --- a/drivers/gpu/drm/drm_mode_config.c +++ b/drivers/gpu/drm/drm_mode_config.c @@ -310,6 +310,12 @@ static int drm_mode_create_standard_properties(struct drm_device *dev) return -ENOMEM; dev->mode_config.prop_mode_id = prop; + prop = drm_property_create_bool(dev, 0, + "VRR_ENABLED"); + if (!prop) + return -ENOMEM; + dev->mode_config.prop_vrr_enabled = prop; + prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, "DEGAMMA_LUT", 0); -- cgit v1.2.3