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drm/g94-/disp: bash and wait for something after changing lane power regs 

Some kind of update?  Needed to make the power-down take effect at least.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2014-05-26 12:00:07 +10:00
parent 1ecee1cda3
commit 13a61757db
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/nouveau/core/engine/disp/sornv94.c
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@ -69,6 +69,7 @@ int
nv94_sor_dp_lnk_pwr(struct nvkm_output_dp *outp, int nr)
{
struct nv50_disp_priv *priv = (void *)nouveau_disp(outp);
const u32 soff = nv94_sor_soff(outp);
const u32 loff = nv94_sor_loff(outp);
u32 mask = 0, i;
@ -76,6 +77,8 @@ nv94_sor_dp_lnk_pwr(struct nvkm_output_dp *outp, int nr)
mask |= 1 << (nv94_sor_dp_lane_map(priv, i) >> 3);
nv_mask(priv, 0x61c130 + loff, 0x0000000f, mask);
nv_mask(priv, 0x61c034 + soff, 0x80000000, 0x80000000);
nv_wait(priv, 0x61c034 + soff, 0x80000000, 0x00000000);
return 0;
}