From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
3.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ben Skeggs <bskeggs@xxxxxxxxxx>
commit d40ee48acde16894fb3b241d7e896d5fa84e0f10 upstream.
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@xxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nv50_display.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -1554,7 +1554,9 @@ nv50_dac_detect(struct drm_encoder *enco
{
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)
--
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