diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2011-12-17 14:02:51 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2012-05-24 16:31:12 +1000 |
| commit | 074e747a6d371192419fb5abeabb9686d0cf24a5 (patch) | |
| tree | d41c0ed9c29abf7d6acb7fb3f0bcf4fe0cff3102 /drivers | |
| parent | 41ceeeb25d5be06660a040e2fc99d6405dfc07f8 (diff) | |
drm/nva3/pm: introduce more paranoia
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nva3_pm.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/gpu/drm/nouveau/nva3_pm.c b/drivers/gpu/drm/nouveau/nva3_pm.c index 9e636e6ef6d..0f93c54de80 100644 --- a/drivers/gpu/drm/nouveau/nva3_pm.c +++ b/drivers/gpu/drm/nouveau/nva3_pm.c @@ -98,7 +98,9 @@ read_pll(struct drm_device *dev, int clk, u32 pll) sclk = read_clk(dev, 0x10 + clk, false); } - return sclk * N / (M * P); + if (M * P) + return sclk * N / (M * P); + return 0; } struct creg { @@ -182,23 +184,26 @@ prog_pll(struct drm_device *dev, int clk, u32 pll, struct creg *reg) const u32 src1 = 0x004160 + (clk * 4); const u32 ctrl = pll + 0; const u32 coef = pll + 4; - u32 cntl; if (!reg->clk && !reg->pll) { NV_DEBUG(dev, "no clock for %02x\n", clk); return; } - cntl = nv_rd32(dev, ctrl) & 0xfffffff2; if (reg->pll) { nv_mask(dev, src0, 0x00000101, 0x00000101); nv_wr32(dev, coef, reg->pll); - nv_wr32(dev, ctrl, cntl | 0x00000015); + nv_mask(dev, ctrl, 0x00000015, 0x00000015); + nv_mask(dev, ctrl, 0x00000010, 0x00000000); + nv_wait(dev, ctrl, 0x00020000, 0x00020000); + nv_mask(dev, ctrl, 0x00000010, 0x00000010); + nv_mask(dev, ctrl, 0x00000008, 0x00000000); nv_mask(dev, src1, 0x00000100, 0x00000000); nv_mask(dev, src1, 0x00000001, 0x00000000); } else { nv_mask(dev, src1, 0x003f3141, 0x00000101 | reg->clk); - nv_wr32(dev, ctrl, cntl | 0x0000001d); + nv_mask(dev, ctrl, 0x00000018, 0x00000018); + udelay(20); nv_mask(dev, ctrl, 0x00000001, 0x00000000); nv_mask(dev, src0, 0x00000100, 0x00000000); nv_mask(dev, src0, 0x00000001, 0x00000000); |