diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 698257cf6381..9753bd9591eb 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3663,9 +3663,9 @@ void gen6_update_ring_freq(struct drm_device *dev) /* Convert from kHz to MHz */ max_ia_freq /= 1000; - min_ring_freq = I915_READ(MCHBAR_MIRROR_BASE_SNB + DCLK); - /* convert DDR frequency from units of 133.3MHz to bandwidth */ - min_ring_freq = (2 * 4 * min_ring_freq + 2) / 3; + min_ring_freq = I915_READ(MCHBAR_MIRROR_BASE_SNB + DCLK) & 0xf; + /* convert DDR frequency from units of 266.6MHz to bandwidth */ + min_ring_freq = mult_frac(min_ring_freq, 8, 3); /* * For each potential GPU frequency, load a ring frequency we'd like @@ -3678,7 +3678,7 @@ void gen6_update_ring_freq(struct drm_device *dev) unsigned int ia_freq = 0, ring_freq = 0; if (IS_HASWELL(dev)) { - ring_freq = (gpu_freq * 5 + 3) / 4; + ring_freq = mult_frac(gpu_freq, 5, 4); ring_freq = max(min_ring_freq, ring_freq); /* leave ia_freq as the default, chosen by cpufreq */ } else { |