From e9ebb68b86dd75fe2d61467f834dcf572e6859df Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Wed, 28 Apr 2010 14:07:06 +1000 Subject: drm/nv50: support fractional feedback divider on newer chips Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nv50_crtc.c | 48 +++++++++++++++++++------------------ 1 file changed, 25 insertions(+), 23 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nv50_crtc.c') diff --git a/drivers/gpu/drm/nouveau/nv50_crtc.c b/drivers/gpu/drm/nouveau/nv50_crtc.c index 41fe8aec0a12..b4e4a3b05eae 100644 --- a/drivers/gpu/drm/nouveau/nv50_crtc.c +++ b/drivers/gpu/drm/nouveau/nv50_crtc.c @@ -264,38 +264,40 @@ nv50_crtc_set_scale(struct nouveau_crtc *nv_crtc, int scaling_mode, bool update) int nv50_crtc_set_clock(struct drm_device *dev, int head, int pclk) { - uint32_t pll_reg = NV50_PDISPLAY_CRTC_CLK_CTRL1(head); - struct nouveau_pll_vals pll; - struct pll_lims limits; + uint32_t reg = NV50_PDISPLAY_CRTC_CLK_CTRL1(head); + struct pll_lims pll; uint32_t reg1, reg2; - int ret; + int ret, N1, M1, N2, M2, P; - ret = get_pll_limits(dev, pll_reg, &limits); + ret = get_pll_limits(dev, reg, &pll); if (ret) return ret; - ret = nouveau_calc_pll_mnp(dev, &limits, pclk, &pll); - if (ret <= 0) - return ret; + if (pll.vco2.maxfreq) { + ret = nv50_calc_pll(dev, &pll, pclk, &N1, &M1, &N2, &M2, &P); + if (ret <= 0) + return 0; - if (limits.vco2.maxfreq) { NV_DEBUG(dev, "pclk %d out %d NM1 %d %d NM2 %d %d P %d\n", - pclk, ret, pll.N1, pll.M1, pll.N2, pll.M2, pll.log2P); - - reg1 = nv_rd32(dev, pll_reg + 4) & 0xff00ff00; - reg2 = nv_rd32(dev, pll_reg + 8) & 0x8000ff00; - nv_wr32(dev, pll_reg, 0x10000611); - nv_wr32(dev, pll_reg + 4, reg1 | (pll.M1 << 16) | pll.N1); - nv_wr32(dev, pll_reg + 8, - reg2 | (pll.log2P << 28) | (pll.M2 << 16) | pll.N2); + pclk, ret, N1, M1, N2, M2, P); + + reg1 = nv_rd32(dev, reg + 4) & 0xff00ff00; + reg2 = nv_rd32(dev, reg + 8) & 0x8000ff00; + nv_wr32(dev, reg, 0x10000611); + nv_wr32(dev, reg + 4, reg1 | (M1 << 16) | N1); + nv_wr32(dev, reg + 8, reg2 | (P << 28) | (M2 << 16) | N2); } else { - NV_DEBUG(dev, "pclk %d out %d NM %d %d P %d\n", - pclk, ret, pll.N1, pll.M1, pll.log2P); + ret = nv50_calc_pll2(dev, &pll, pclk, &N1, &N2, &M1, &P); + if (ret <= 0) + return 0; + + NV_DEBUG(dev, "pclk %d out %d N %d fN 0x%04x M %d P %d\n", + pclk, ret, N1, N2, M1, P); - reg1 = nv_rd32(dev, pll_reg + 4) & 0xffc00000; - nv_wr32(dev, pll_reg, 0x50000610); - nv_wr32(dev, pll_reg + 4, reg1 | - (pll.log2P << 16) | (pll.M1 << 8) | pll.N1); + reg1 = nv_rd32(dev, reg + 4) & 0xffc00000; + nv_wr32(dev, reg, 0x50000610); + nv_wr32(dev, reg + 4, reg1 | (P << 16) | (M1 << 8) | N1); + nv_wr32(dev, reg + 8, N2); } return 0; -- cgit v1.2.3