drm/nouveau/nv1a,nv1f/disp: fix memory clock rate retrieval

Based on the xf86-video-nv code, NFORCE (NV1A) and NFORCE2 (NV1F) have a
different way of retrieving clocks. See the
nv_hw.c:nForceUpdateArbitrationSettings function in the original code
for how these clocks were accessed.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54587
Cc: stable@vger.kernel.org
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/dispnv04/hw.c b/drivers/gpu/drm/nouveau/dispnv04/hw.c
index 74856a8b8f35943b08a59f8aed5a546e98058d3c..e64f52464ecf55b83a17f25b434cb9e1474c10e1 100644 (file)
--- a/drivers/gpu/drm/nouveau/dispnv04/hw.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/hw.c
@@ -222,6 +222,7 @@ nouveau_hw_get_clock(struct drm_device *dev, enum nvbios_pll_type plltype)
                uint32_t mpllP;
 
                pci_read_config_dword(pci_get_bus_and_slot(0, 3), 0x6c, &mpllP);
+               mpllP = (mpllP >> 8) & 0xf;
                if (!mpllP)
                        mpllP = 4;
 
@@ -232,7 +233,7 @@ nouveau_hw_get_clock(struct drm_device *dev, enum nvbios_pll_type plltype)
                uint32_t clock;
 
                pci_read_config_dword(pci_get_bus_and_slot(0, 5), 0x4c, &clock);
-               return clock;
+               return clock / 1000;
        }
 
        ret = nouveau_hw_get_pllvals(dev, plltype, &pllvals);