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drm/radeon/kms: r420 idle after programming GA_ENHANCE

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https://bugs.freedesktop.org/show_bug.cgi?id=24041

The idle allows rs690 to startup properly.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2009-09-21 14:15:10 +10:00
parent fe62e1a45d
commit 18a4cd2e91
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/radeon/r420.c
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@ -64,6 +64,11 @@ void r420_pipes_init(struct radeon_device *rdev)
/* GA_ENHANCE workaround TCL deadlock issue */
WREG32(0x4274, (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3));
/* add idle wait as per freedesktop.org bug 24041 */
if (r100_gui_wait_for_idle(rdev)) {
printk(KERN_WARNING "Failed to wait GUI idle while "
"programming pipes. Bad things might happen.\n");
}
/* get max number of pipes */
gb_pipe_select = RREG32(0x402C);
num_pipes = ((gb_pipe_select >> 12) & 3) + 1;