diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0569-drm-v3d-Drop-the-wait-for-L2T-flush-to-complete.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0569-drm-v3d-Drop-the-wait-for-L2T-flush-to-complete.patch | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0569-drm-v3d-Drop-the-wait-for-L2T-flush-to-complete.patch b/target/linux/brcm2708/patches-4.19/950-0569-drm-v3d-Drop-the-wait-for-L2T-flush-to-complete.patch deleted file mode 100644 index 70c14f1826..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0569-drm-v3d-Drop-the-wait-for-L2T-flush-to-complete.patch +++ /dev/null @@ -1,41 +0,0 @@ -From 9d8fa62500ae52348d36766e70b49c7508addaf3 Mon Sep 17 00:00:00 2001 -From: Eric Anholt <eric@anholt.net> -Date: Mon, 3 Dec 2018 14:24:36 -0800 -Subject: [PATCH 569/806] drm/v3d: Drop the wait for L2T flush to complete. - -According to Dave, once you've started an L2T flush, all L2T accesses -will be blocked until the flush completes. This fixes a consistent -3-4ms stall between the ioctl and running the job, and 3DMMES Taiji -goes from 27fps to 110fps. - -v2: Leave a note about why we don't need to wait for completion. - -Signed-off-by: Eric Anholt <eric@anholt.net> -Fixes: 57692c94dcbe ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+") -Reviewed-by: Dave Emett <david.emett@broadcom.com> -Link: https://patchwork.freedesktop.org/patch/msgid/20181203222438.25417-4-eric@anholt.net -(cherry picked from commit 51c1b6f9eb3dbdec91b0e3c89f623e634c996bbb) ---- - drivers/gpu/drm/v3d/v3d_gem.c | 8 ++++---- - 1 file changed, 4 insertions(+), 4 deletions(-) - ---- a/drivers/gpu/drm/v3d/v3d_gem.c -+++ b/drivers/gpu/drm/v3d/v3d_gem.c -@@ -143,13 +143,13 @@ v3d_invalidate_l2(struct v3d_dev *v3d, i - static void - v3d_flush_l2t(struct v3d_dev *v3d, int core) - { -+ /* While there is a busy bit (V3D_L2TCACTL_L2TFLS), we don't -+ * need to wait for completion before dispatching the job -- -+ * L2T accesses will be stalled until the flush has completed. -+ */ - V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL, - V3D_L2TCACTL_L2TFLS | - V3D_SET_FIELD(V3D_L2TCACTL_FLM_FLUSH, V3D_L2TCACTL_FLM)); -- if (wait_for(!(V3D_CORE_READ(core, V3D_CTL_L2TCACTL) & -- V3D_L2TCACTL_L2TFLS), 100)) { -- DRM_ERROR("Timeout waiting for L2T flush\n"); -- } - } - - /* Invalidates the slice caches. These are read-only caches. */ |