diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0541-drm-vc4-Make-sure-that-vblank-waits-work-without-v3d.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0541-drm-vc4-Make-sure-that-vblank-waits-work-without-v3d.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0541-drm-vc4-Make-sure-that-vblank-waits-work-without-v3d.patch b/target/linux/brcm2708/patches-4.19/950-0541-drm-vc4-Make-sure-that-vblank-waits-work-without-v3d.patch new file mode 100644 index 0000000000..32eba1c885 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0541-drm-vc4-Make-sure-that-vblank-waits-work-without-v3d.patch @@ -0,0 +1,27 @@ +From 561918ec5e668f9d940051737d861ee0592816f6 Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +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 <eric@anholt.net> +--- + 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"); |