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: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index 9b38956..49a2fdc 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -64,6 +64,11 @@
/* 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;