Partner to the existing PREFER_CLOSEST_LOWER. A new flag
to prefer slightly higher target frequencies if the target
cannot be hit exactly.
Signed-off-by: Alex Deucher <alexdeucher@xxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_display.c | 5 +++++
drivers/gpu/drm/radeon/radeon_mode.h | 5 +++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 5c9451e..0eae4a4 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -908,6 +908,11 @@ void radeon_compute_pll(struct radeon_pll *pll,
error = 0xffffffff;
else
error = freq - current_freq;
+ } else if (pll->flags & RADEON_PLL_PREFER_CLOSEST_HIGHER) {
+ if (freq > current_freq)
+ error = 0xffffffff;
+ else
+ error = current_freq - freq;
} else
error = abs(current_freq - freq);
vco_diff = abs(vco - best_vco);
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 162f36b..6b92dec 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -147,8 +147,9 @@ struct radeon_tmds_pll {
#define RADEON_PLL_PREFER_HIGH_POST_DIV (1 << 9)
#define RADEON_PLL_USE_FRAC_FB_DIV (1 << 10)
#define RADEON_PLL_PREFER_CLOSEST_LOWER (1 << 11)
-#define RADEON_PLL_USE_POST_DIV (1 << 12)
-#define RADEON_PLL_IS_LCD (1 << 13)
+#define RADEON_PLL_PREFER_CLOSEST_HIGHER (1 << 12)
+#define RADEON_PLL_USE_POST_DIV (1 << 13)
+#define RADEON_PLL_IS_LCD (1 << 14)
struct radeon_pll {
/* reference frequency */
--
1.7.1.1
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