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| author | Phil Elwell <phil@raspberrypi.org> | 2020-12-23 23:35:13 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2021-01-06 20:38:57 +0300 |
| commit | 545d9d780262fcff6ed48dcd812a816cd88e5003 (patch) | |
| tree | 8df1a3d506161d871a5b8e44d8272ec9c9ffed5f /drivers/gpu/drm/v3d | |
| parent | 334dd38a3878a8fba1cfaa3c715163226de3cddc (diff) | |
| download | linux-545d9d780262fcff6ed48dcd812a816cd88e5003.tar.xz | |
drm/v3d: Don't clear MMU control bits on exception
MMU exception conditions are reported in the V3D_MMU_CTRL register as
write-1-to-clear (W1C) bits. The MMU interrupt handling code clears any
exceptions, but does so by masking out any other bits and writing the
result back. There are some important control bits in that register,
including MMU_ENABLE, so a safer approach is to simply write back the
value just read unaltered.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/1608755714-18233-4-git-send-email-stefan.wahren@i2se.com
Diffstat (limited to 'drivers/gpu/drm/v3d')
| -rw-r--r-- | drivers/gpu/drm/v3d/v3d_irq.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/gpu/drm/v3d/v3d_irq.c b/drivers/gpu/drm/v3d/v3d_irq.c index 0be2eb7876be..e714d5318f30 100644 --- a/drivers/gpu/drm/v3d/v3d_irq.c +++ b/drivers/gpu/drm/v3d/v3d_irq.c @@ -178,10 +178,7 @@ v3d_hub_irq(int irq, void *arg) }; const char *client = "?"; - V3D_WRITE(V3D_MMU_CTL, - V3D_READ(V3D_MMU_CTL) & (V3D_MMU_CTL_CAP_EXCEEDED | - V3D_MMU_CTL_PT_INVALID | - V3D_MMU_CTL_WRITE_VIOLATION)); + V3D_WRITE(V3D_MMU_CTL, V3D_READ(V3D_MMU_CTL)); if (v3d->ver >= 41) { axi_id = axi_id >> 5; |