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drm/nv50/kms: use dac loadval from vbios, where it's available 

Regression from merging the old nv50/nvd9 code together, and may be
needed to fully fix fdo#64904.

The value is ignored completely by the hardware starting from nva3.

Reported-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2013-06-03 16:40:14 +10:00
parent ea9197cc32
commit d40ee48acd
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/nouveau/nv50_display.c
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@ -1554,7 +1554,9 @@ nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
{
struct nv50_disp *disp = nv50_disp(encoder->dev);
int ret, or = nouveau_encoder(encoder)->or;
u32 load = 0;
u32 load = nouveau_drm(encoder->dev)->vbios.dactestval;
if (load == 0)
load = 340;
ret = nv_exec(disp->core, NV50_DISP_DAC_LOAD + or, &load, sizeof(load));
if (ret || load != 7)