diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/clock/pllnva3.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/clock/pllnva3.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/pllnva3.c b/drivers/gpu/drm/nouveau/core/subdev/clock/pllnva3.c index eed5c16cf610..2fe1f712eefa 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/clock/pllnva3.c +++ b/drivers/gpu/drm/nouveau/core/subdev/clock/pllnva3.c @@ -29,7 +29,7 @@ #include "pll.h" int -nva3_pll_calc(struct nouveau_clock *clock, struct nvbios_pll *info, +nva3_pll_calc(struct nouveau_subdev *subdev, struct nvbios_pll *info, u32 freq, int *pN, int *pfN, int *pM, int *P) { u32 best_err = ~0, err; @@ -50,8 +50,15 @@ nva3_pll_calc(struct nouveau_clock *clock, struct nvbios_pll *info, u32 tmp = freq * *P * M; N = tmp / info->refclk; fN = tmp % info->refclk; - if (!pfN && fN >= info->refclk / 2) - N++; + + if (!pfN) { + if (fN >= info->refclk / 2) + N++; + } else { + if (fN < info->refclk / 2) + N--; + fN = tmp - (N * info->refclk); + } if (N < info->vco1.min_n) continue; @@ -66,13 +73,14 @@ nva3_pll_calc(struct nouveau_clock *clock, struct nvbios_pll *info, } if (pfN) { - *pfN = (((fN << 13) / info->refclk) - 4096) & 0xffff; + *pfN = ((fN << 13) + info->refclk / 2) / info->refclk; + *pfN = (*pfN - 4096) & 0xffff; return freq; } } if (unlikely(best_err == ~0)) { - nv_error(clock, "unable to find matching pll values\n"); + nv_error(subdev, "unable to find matching pll values\n"); return -EINVAL; } |