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drm/nv50/pm: avoid touching dom6/vdec clocks if perflvl doesn't define it 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-10-31 10:52:33 +10:00
parent 463464eb9b
commit 973e861657
1 changed files with 16 additions and 16 deletions
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32
drivers/gpu/drm/nouveau/nv50_pm.c
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@ -485,7 +485,8 @@ nv50_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
* clock domains work, i suspect at least some of them can also be
* tied to xpll...
*/
info->amast = info->pdivs = 0;
info->amast = nv_rd32(dev, 0x00c040);
info->pdivs = read_div(dev);
if (perflvl->vdec) {
/* see how close we can get using nvclk as a source */
clk = calc_div(perflvl->core, perflvl->vdec, &P1);
@ -498,12 +499,12 @@ nv50_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
out = calc_div(out, perflvl->vdec, &P2);
/* select whichever gets us closest */
info->amast &= ~0x00000c00;
info->pdivs &= ~0x00000700;
if (abs((int)perflvl->vdec - clk) <=
abs((int)perflvl->vdec - out)) {
if (dev_priv->chipset != 0x98)
info->amast |= 0x00000c00;
else
info->amast |= 0x00000000;
info->pdivs |= P1 << 8;
} else {
info->amast |= 0x00000800;
@ -514,23 +515,22 @@ nv50_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
/* dom6: nfi what this is, but we're limited to various combinations
* of the host clock frequency
*/
if (clk_same(perflvl->dom6, read_clk(dev, clk_src_href))) {
info->amast |= 0x00000000;
info->pdivs |= read_div(dev) & 0x00000007;
} else
if (clk_same(perflvl->dom6, read_clk(dev, clk_src_hclk))) {
info->amast |= 0x08000000;
info->pdivs |= read_div(dev) & 0x00000007;
} else
if (perflvl->dom6) {
clk = read_clk(dev, clk_src_hclk) * 3;
clk = calc_div(clk, perflvl->dom6, &P1);
info->amast &= ~0x0c000000;
if (clk_same(perflvl->dom6, read_clk(dev, clk_src_href))) {
info->amast |= 0x00000000;
} else
if (clk_same(perflvl->dom6, read_clk(dev, clk_src_hclk))) {
info->amast |= 0x08000000;
} else {
clk = read_clk(dev, clk_src_hclk) * 3;
clk = calc_div(clk, perflvl->dom6, &P1);
info->amast |= 0x0c000000;
info->pdivs |= P1;
info->amast |= 0x0c000000;
info->pdivs = (info->pdivs & ~0x00000007) | P1;
}
}
return info;
error:
kfree(info);