drm/i915: Do the DRIVER_ATOMIC feature disable later

Currently we do the DRIVER_ATOMIC disable as almost the
first thing during pci probe. That involves the use of
DISPLAY_VER() which is perhaps a bit sketchy now that we
may need to read that out from the hardware itself.
Looks like we do populate a default value for it anyway
so the current does at least still work.

But let's make this safer anyway and move the code
into intel_device_info_runtime_init() where we also
handle the same thing for the !HAS_DISPLAY case.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221007211108.3883-1-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/i915_driver.c

@@ -861,10 +861,6 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (IS_ERR(i915))
 		return PTR_ERR(i915);
 
-	/* Disable nuclear pageflip by default on pre-ILK */
-	if (!i915->params.nuclear_pageflip && DISPLAY_VER(i915) < 5)
-		i915->drm.driver_features &= ~DRIVER_ATOMIC;
-
 	ret = pci_enable_device(pdev);
 	if (ret)
 		goto out_fini;

drivers/gpu/drm/i915/intel_device_info.c

@@ -507,6 +507,10 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 		runtime->has_dmc = false;
 		runtime->has_dsc = false;
 	}
+
+	/* Disable nuclear pageflip by default on pre-ILK */
+	if (!dev_priv->params.nuclear_pageflip && DISPLAY_VER(dev_priv) < 5)
+		dev_priv->drm.driver_features &= ~DRIVER_ATOMIC;
 }
 
 void intel_driver_caps_print(const struct intel_driver_caps *caps,