From c778cc5df944291dcdb1ca7a6bb781fbc22550c5 Mon Sep 17 00:00:00 2001 From: Jonas Pfeil Date: Tue, 8 Nov 2016 00:18:39 +0100 Subject: drm/vc4: Add fragment shader threading support FS threading brings performance improvements of 0-20% in glmark2. The validation code checks for thread switch signals and ensures that the registers of the other thread are not touched, and that our clamps are not live across thread switches. It also checks that the threading and branching instructions do not interfere. (Original patch by Jonas, changes by anholt for style cleanup, removing validation the kernel doesn't need to do, and adding the flag for userspace). v2: Minor style fixes from checkpatch. Signed-off-by: Jonas Pfeil Signed-off-by: Eric Anholt --- drivers/gpu/drm/vc4/vc4_drv.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpu/drm/vc4/vc4_drv.c') diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 7abfe088f2d1..86aabf6d0f79 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -82,6 +82,7 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data, break; case DRM_VC4_PARAM_SUPPORTS_BRANCHES: case DRM_VC4_PARAM_SUPPORTS_ETC1: + case DRM_VC4_PARAM_SUPPORTS_THREADED_FS: args->value = true; break; default: -- cgit v1.2.3