From 561918ec5e668f9d940051737d861ee0592816f6 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 29 Mar 2019 12:04:36 -0700 Subject: [PATCH] drm/vc4: Make sure that vblank waits work without v3d loaded. This flag exists to protect legacy drivers, but when vc4's v3d doesn't probe, it doesn't get set up by vc4_v3d.c's call of drm_irq_install. This resulted in applications running as fast as possible, and laggy performance from compton as it had to wait for the latest rendering by the application for its presentation. Signed-off-by: Eric Anholt --- drivers/gpu/drm/vc4/vc4_kms.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -422,6 +422,7 @@ int vc4_kms_load(struct drm_device *dev) /* Set support for vblank irq fast disable, before drm_vblank_init() */ dev->vblank_disable_immediate = true; + dev->irq_enabled = true; ret = drm_vblank_init(dev, dev->mode_config.num_crtc); if (ret < 0) { dev_err(dev->dev, "failed to initialize vblank\n");