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drm/nvc0/pm: enable mpll src pll, and calc mpll coefficients 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-02-06 11:34:20 +10:00
parent a1da205f42
commit 6b91d6b056
1 changed files with 51 additions and 0 deletions
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51
drivers/gpu/drm/nouveau/nvc0_pm.c
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@ -166,6 +166,7 @@ struct nvc0_pm_clock {
struct nvc0_pm_state {
struct nouveau_pm_level *perflvl;
struct nvc0_pm_clock eng[16];
struct nvc0_pm_clock mem;
};
static u32
@ -304,6 +305,48 @@ calc_clk(struct drm_device *dev, int clk, struct nvc0_pm_clock *info, u32 freq)
return 0;
}
static int
calc_mem(struct drm_device *dev, struct nvc0_pm_clock *info, u32 freq)
{
struct pll_lims pll;
int N, M, P, ret;
u32 ctrl;
/* mclk pll input freq comes from another pll, make sure it's on */
ctrl = nv_rd32(dev, 0x132020);
if (!(ctrl & 0x00000001)) {
/* if not, program it to 567MHz. nfi where this value comes
* from - it looks like it's in the pll limits table for
* 132000 but the binary driver ignores all my attempts to
* change this value.
*/
nv_wr32(dev, 0x137320, 0x00000103);
nv_wr32(dev, 0x137330, 0x81200606);
nv_wait(dev, 0x132020, 0x00010000, 0x00010000);
nv_wr32(dev, 0x132024, 0x0001150f);
nv_mask(dev, 0x132020, 0x00000001, 0x00000001);
nv_wait(dev, 0x137390, 0x00020000, 0x00020000);
nv_mask(dev, 0x132020, 0x00000004, 0x00000004);
}
/* for the moment, until the clock tree is better understood, use
* pll mode for all clock frequencies
*/
ret = get_pll_limits(dev, 0x132000, &pll);
if (ret == 0) {
pll.refclk = read_pll(dev, 0x132020);
if (pll.refclk) {
ret = nva3_calc_pll(dev, &pll, freq, &N, NULL, &M, &P);
if (ret > 0) {
info->coef = (P << 16) | (N << 8) | M;
return 0;
}
}
}
return -EINVAL;
}
void *
nvc0_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
@ -336,6 +379,14 @@ nvc0_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
return ERR_PTR(ret);
}
if (perflvl->memory) {
ret = calc_mem(dev, &info->mem, perflvl->memory);
if (ret) {
kfree(info);
return ERR_PTR(ret);
}
}
info->perflvl = perflvl;
return info;
}