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drm/msm/dsi_phy_10nm: Fix bad VCO rate calculation

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AngeloGioacchino Del Regno 2021-07-27 12:35:49 +03:00 • committed by Jami Kettunen
parent cc6fffa125
commit 569acf18fb
1 changed files with 3 additions and 4 deletions
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7
drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
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@ -122,7 +122,7 @@ static void dsi_pll_calc_dec_frac(struct dsi_pll_10nm *pll, struct dsi_pll_confi
pll_freq = pll->vco_current_rate;
divider = fref * 2;
divider = fref;
multiplier = 1 << FRAC_BITS;
dec_multiple = div_u64(pll_freq * multiplier, divider);
@ -443,12 +443,11 @@ static unsigned long dsi_pll_10nm_vco_recalc_rate(struct clk_hw *hw,
* 1. Assumes prescaler is disabled
*/
multiplier = 1 << FRAC_BITS;
pll_freq = dec * (ref_clk * 2);
tmp64 = (ref_clk * 2 * frac);
pll_freq = dec * ref_clk;
tmp64 = ref_clk * frac;
pll_freq += div_u64(tmp64, multiplier);
vco_rate = pll_freq;
pll_10nm->vco_current_rate = vco_rate;
DBG("DSI PLL%d returning vco rate = %lu, dec = %x, frac = %x",
pll_10nm->phy->id, (unsigned long)vco_rate, dec, frac);