From: Eric Anholt <eric@anholt.net>
To: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org,
Dave Emett <david.emett@broadcom.com>,
Thomas Spurden <thomas.spurden@broadcom.com>,
Eric Anholt <eric@anholt.net>
Subject: [PATCH v2 3/6] drm/v3d: Don't bother flushing L1TD at job start.
Date: Mon, 3 Dec 2018 14:24:35 -0800 [thread overview]
Message-ID: <20181203222438.25417-3-eric@anholt.net> (raw)
In-Reply-To: <20181203222438.25417-1-eric@anholt.net>
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>
---
drivers/gpu/drm/v3d/v3d_gem.c | 12 ------------
1 file changed, 12 deletions(-)
diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 92413cbcf92c..01e879c71cad 100644
--- 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, int core)
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));
--
2.20.0.rc1
next prev parent reply other threads:[~2018-12-03 22:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 22:24 [PATCH v2 1/6] drm/v3d: Document cache flushing ABI Eric Anholt
2018-12-03 22:24 ` [PATCH v2 2/6] drm/v3d: Drop unused v3d_flush_caches() Eric Anholt
2018-12-03 22:24 ` Eric Anholt [this message]
2018-12-03 22:24 ` [PATCH v2 4/6] drm/v3d: Drop the wait for L2T flush to complete Eric Anholt
2018-12-04 11:53 ` Dave Emett
2018-12-03 22:24 ` [PATCH v2 5/6] drm/v3d: Stop trying to flush L2C on V3D 3.3+ Eric Anholt
2018-12-04 11:54 ` Dave Emett
2018-12-03 22:24 ` [PATCH v2 6/6] drm/v3d: Invalidate the caches from the outside in Eric Anholt
2018-12-04 12:01 ` Dave Emett
2018-12-04 11:51 ` [PATCH v2 1/6] drm/v3d: Document cache flushing ABI Dave Emett
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