RADEON: PLL tweaks

Patch from Jiří Paleček (see debian bug 465864) with some tweaks
by me.

- abort rather than programming bad dividers if no pll dividers can be found
- improve the pll selection algorithm
- in general, prefer lower ref dividers

I've tested this patch on a wide variety of chips (r1xx-r6xx) and clocks.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/radeon.h b/src/radeon.h
index cdd84ea7..4f77c3b9 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -220,7 +220,7 @@ typedef struct {
 #define RADEON_PLL_NO_ODD_POST_DIV (1 << 1)
 #define RADEON_PLL_USE_REF_DIV     (1 << 2)
 #define RADEON_PLL_LEGACY          (1 << 3)
-#define RADEON_PLL_DCE3            (1 << 4)
+#define RADEON_PLL_PREFER_LOW_REF_DIV (1 << 4)
 
 typedef struct {
     uint16_t          reference_freq;