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drm/radeon: some r420s have a CP race with the DMA engine.

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This patch makes sure the CP doesn't DMA do VRAM while 2D
is active by inserting a CP resync token.

todo: port to kms.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2009-09-21 14:48:45 +10:00
committed by Dave Airlie
parent 5a6e9f9658
commit aadd4e1745
2 changed files with 26 additions and 0 deletions
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3
drivers/gpu/drm/radeon/radeon_drv.h
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@@ -1099,6 +1099,9 @@ extern u32 radeon_get_scratch(drm_radeon_private_t *dev_priv, int index);
# define RADEON_CSQ_PRIBM_INDBM (4 << 28)
# define RADEON_CSQ_PRIPIO_INDPIO (15 << 28)
#define R300_CP_RESYNC_ADDR 0x0778
#define R300_CP_RESYNC_DATA 0x077c
#define RADEON_AIC_CNTL 0x01d0
# define RADEON_PCIGART_TRANSLATE_EN (1 << 0)
# define RS400_MSI_REARM (1 << 3)