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drm/radeon: improve mclk param calcuations for ci dpm

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Properly take into account the post divider.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-11-07 12:56:00 -05:00
parent 21b8a36904
commit c0392f8f09
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/radeon/ci_dpm.c
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@ -2409,10 +2409,10 @@ static int ci_calculate_mclk_params(struct radeon_device *rdev,
u32 tmp;
u32 reference_clock = rdev->clock.mpll.reference_freq;
if (pi->mem_gddr5)
freq_nom = memory_clock * 4;
if (mpll_param.qdr == 1)
freq_nom = memory_clock * 4 * (1 << mpll_param.post_div);
else
freq_nom = memory_clock * 2;
freq_nom = memory_clock * 2 * (1 << mpll_param.post_div);
tmp = (freq_nom / reference_clock);
tmp = tmp * tmp;