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drm/radeon: use fixed PPL ref divider if needed

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Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Christian König 2014-04-19 18:57:14 +02:00
parent 76e6dcece8
commit 2431581423
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/radeon/radeon_display.c
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@ -880,7 +880,12 @@ void radeon_compute_pll_avivo(struct radeon_pll *pll,
ref_div_min = pll->reference_div; ref_div_min = pll->reference_div;
else else
ref_div_min = pll->min_ref_div; ref_div_min = pll->min_ref_div;
ref_div_max = pll->max_ref_div;
if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV &&
pll->flags & RADEON_PLL_USE_REF_DIV)
ref_div_max = pll->reference_div;
else
ref_div_max = pll->max_ref_div;
/* determine allowed post divider range */ /* determine allowed post divider range */
if (pll->flags & RADEON_PLL_USE_POST_DIV) { if (pll->flags & RADEON_PLL_USE_POST_DIV) {