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drm/nvc0/pm: minor clock readback fixes 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-06-23 16:37:00 +10:00
parent 59ef9742f6
commit 8ce51fcfee
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/nouveau/nvc0_pm.c
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@ -42,12 +42,16 @@ read_vco(struct drm_device *dev, u32 dsrc)
static u32
read_pll(struct drm_device *dev, u32 pll)
{
u32 ctrl = nv_rd32(dev, pll + 0);
u32 coef = nv_rd32(dev, pll + 4);
u32 P = (coef & 0x003f0000) >> 16;
u32 N = (coef & 0x0000ff00) >> 8;
u32 M = (coef & 0x000000ff) >> 0;
u32 sclk, doff;
if (!(ctrl & 0x00000001))
return 0;
switch (pll & 0xfff000) {
case 0x00e000:
sclk = 27000;
@ -91,12 +95,12 @@ read_div(struct drm_device *dev, int doff, u32 dsrc, u32 dctl)
return 100000;
case 3:
if (sctl & 0x80000000) {
u32 sclk = read_vco(dev, dsrc);
u32 sclk = read_vco(dev, dsrc + (doff * 4));
u32 sdiv = (sctl & 0x0000003f) + 2;
return (sclk * 2) / sdiv;
}
return read_vco(dev, dsrc);
return read_vco(dev, dsrc + (doff * 4));
default:
return 0;
}