diff options
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/rockchip/rk3288/clock.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/src/soc/rockchip/rk3288/clock.c b/src/soc/rockchip/rk3288/clock.c index 878c1949a3..e4d2e3eb98 100644 --- a/src/soc/rockchip/rk3288/clock.c +++ b/src/soc/rockchip/rk3288/clock.c @@ -498,7 +498,7 @@ void rkclk_configure_tsadc(unsigned int hz) RK_CLRSETBITS(0x3f << 0, (div - 1) << 0)); } -static int pll_para_config(u32 freq_hz, struct pll_div *div) +static int pll_para_config(u32 freq_hz, struct pll_div *div, u32 *ext_div) { u32 ref_khz = OSC_HZ / KHz, nr, nf = 0; u32 fref_khz; @@ -512,17 +512,27 @@ static int pll_para_config(u32 freq_hz, struct pll_div *div) printk(BIOS_ERR, "%s: the frequency can not be 0 Hz\n", __func__); return -1; } + no = div_round_up(VCO_MIN_KHZ, freq_khz); + if (ext_div) { + *ext_div = div_round_up(no, max_no); + no = div_round_up(no, *ext_div); + } /* only even divisors (and 1) are supported */ if (no > 1) no = div_round_up(no, 2) * 2; + vco_khz = freq_khz * no; + if (ext_div) + vco_khz *= *ext_div; + if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ || no > max_no) { printk(BIOS_ERR, "%s: Cannot find out a supported VCO" " for Frequency (%uHz).\n", __func__, freq_hz); return -1; } + div->no = no; best_diff_khz = vco_khz; @@ -608,8 +618,9 @@ void rkclk_configure_vop_aclk(u32 vop_id, u32 aclk_hz) int rkclk_configure_vop_dclk(u32 vop_id, u32 dclk_hz) { struct pll_div npll_config = {0}; + u32 lcdc_div; - if (pll_para_config(dclk_hz, &npll_config)) + if (pll_para_config(dclk_hz, &npll_config, &lcdc_div)) return -1; /* npll enter slow-mode */ @@ -633,12 +644,14 @@ int rkclk_configure_vop_dclk(u32 vop_id, u32 dclk_hz) switch (vop_id) { case 0: write32(&cru_ptr->cru_clksel_con[27], - RK_CLRSETBITS(0xff << 8 | 3 << 0, 0 << 8 | 2 << 0)); + RK_CLRSETBITS(0xff << 8 | 3 << 0, + (lcdc_div - 1) << 8 | 2 << 0)); break; case 1: write32(&cru_ptr->cru_clksel_con[29], - RK_CLRSETBITS(0xff << 8 | 3 << 6, 0 << 8 | 2 << 6)); + RK_CLRSETBITS(0xff << 8 | 3 << 6, + (lcdc_div - 1) << 8 | 2 << 6)); break; } return 0; |