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From 7b8186de594a27954c909cd8a9ad1ac2cc27a526 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 3 Dec 2018 14:24:35 -0800
Subject: [PATCH 575/703] drm/v3d: Don't bother flushing L1TD at job start.
This is the write combiner for TMU writes. You're supposed to flush
that at job end if you had dirtied any cachelines. Flushing it at job
start then doesn't make any sense.
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/20181203222438.25417-3-eric@anholt.net
(cherry picked from commit 2e6dc3bd80478212e84addf1cafd6ec60674b884)
---
drivers/gpu/drm/v3d/v3d_gem.c | 12 ------------
1 file changed, 12 deletions(-)
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -139,22 +139,10 @@ v3d_invalidate_l2(struct v3d_dev *v3d, i
V3D_L2CACTL_L2CENA);
}
-static void
-v3d_invalidate_l1td(struct v3d_dev *v3d, int core)
-{
- V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL, V3D_L2TCACTL_TMUWCF);
- if (wait_for(!(V3D_CORE_READ(core, V3D_CTL_L2TCACTL) &
- V3D_L2TCACTL_L2TFLS), 100)) {
- DRM_ERROR("Timeout waiting for L1T write combiner flush\n");
- }
-}
-
/* Invalidates texture L2 cachelines */
static void
v3d_flush_l2t(struct v3d_dev *v3d, int core)
{
- v3d_invalidate_l1td(v3d, core);
-
V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL,
V3D_L2TCACTL_L2TFLS |
V3D_SET_FIELD(V3D_L2TCACTL_FLM_FLUSH, V3D_L2TCACTL_FLM));
|
