drm/nouveau: allow static performance level setting

Guarded by a module parameter for the moment, read the code for the
magic value which enables it.

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

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index ef44070321e6..07171dd3c166 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -4832,8 +4832,11 @@ int get_pll_limits(struct drm_device *dev, uint32_t limit_match, struct pll_lims
          */
         if (limit_match > PLL_MAX)
                 pll_lim->reg = limit_match;
-        else
+        else {
                 pll_lim->reg = get_pll_register(dev, limit_match);
+                if (!pll_lim->reg)
+                        return -ENOENT;
+        }
 
         if (pll_lim_ver == 0x10 || pll_lim_ver == 0x11) {
                 uint8_t *pll_rec = &bios->data[bios->pll_limit_tbl_ptr + headerlen + recordlen * pllindex];