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Commit 18a4cd2e authored by Dave Airlie's avatar Dave Airlie
Browse files

drm/radeon/kms: r420 idle after programming GA_ENHANCE 

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



The idle allows rs690 to startup properly.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent fe62e1a4

drivers/gpu/drm/radeon/r420.c

+5 −0
Original line number Diff line number Diff line
@@ -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;