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@gmail.com --- 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 */