Commit 276e526c authored Jun 30, 2014 by Ben Skeggs

drm/nv50-/kms: pass a non-zero value for head to sor dpms methods



There's Apple machines out there which (probably completely arbitrarily)
restrict each output path to a particular head.  This causes us to not
be able to locate the output data needed to power on/off the DP output
correctly.

We fix this by passing in a head index we know is valid (as opposed to
"head 0").

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

parent 3c4be80b

drivers/gpu/drm/nouveau/nv50_display.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1741,7 +1741,8 @@ nv50_sor_dpms(struct drm_encoder *encoder, int mode)
		}
		}

		mthd = (ffs(nv_encoder->dcb->sorconf.link) - 1) << 2;
		mthd = (ffs(nv_encoder->dcb->heads) - 1) << 3;
		mthd \|= (ffs(nv_encoder->dcb->sorconf.link) - 1) << 2;
		mthd \|= nv_encoder->or;

		if (nv_encoder->dcb->type == DCB_OUTPUT_DP) {