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drm/nv50/bios: fixup mpll programming from the init table parser 

Reportedly this has been causing stability and corruption issues after
resuming from suspend for a few people.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-09-23 15:37:38 +10:00
parent 46b3488650
commit ee9f7ef99f
1 changed files with 13 additions and 9 deletions
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22
drivers/gpu/drm/nouveau/nouveau_bios.c
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@ -640,10 +640,9 @@ static int
nv50_pll_set(struct drm_device *dev, uint32_t reg, uint32_t clk)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t reg0 = nv_rd32(dev, reg + 0);
uint32_t reg1 = nv_rd32(dev, reg + 4);
struct nouveau_pll_vals pll;
struct pll_lims pll_limits;
u32 ctrl, mask, coef;
int ret;
ret = get_pll_limits(dev, reg, &pll_limits);
@ -654,15 +653,20 @@ nv50_pll_set(struct drm_device *dev, uint32_t reg, uint32_t clk)
if (!clk)
return -ERANGE;
reg0 = (reg0 & 0xfff8ffff) | (pll.log2P << 16);
reg1 = (reg1 & 0xffff0000) | (pll.N1 << 8) | pll.M1;
if (dev_priv->vbios.execute) {
still_alive();
nv_wr32(dev, reg + 4, reg1);
nv_wr32(dev, reg + 0, reg0);
coef = pll.N1 << 8 | pll.M1;
ctrl = pll.log2P << 16;
mask = 0x00070000;
if (reg == 0x004008) {
mask |= 0x01f80000;
ctrl |= (pll_limits.log2p_bias << 19);
ctrl |= (pll.log2P << 22);
}
if (!dev_priv->vbios.execute)
return 0;
nv_mask(dev, reg + 0, mask, ctrl);
nv_wr32(dev, reg + 4, coef);
return 0;
}