Skip MCHBAR queries when display is not available

Platforms without display do not map the MCHBAR MMIO into the GFX
device BAR. Skip this sequence when display is not available.

Signed-off-by: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191120004505.149516-1-stuart.summers@intel.com

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index fc8286809e626981939dc79896ed88f96b3a7f30..aa1d9e25f934e6df2aac673280ca7f2f4a2b227e 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1052,7 +1052,7 @@ intel_get_dram_info(struct drm_i915_private *dev_priv)
         */
        dram_info->is_16gb_dimm = !IS_GEN9_LP(dev_priv);
 
-       if (INTEL_GEN(dev_priv) < 9)
+       if (INTEL_GEN(dev_priv) < 9 || !HAS_DISPLAY(dev_priv))
                return;
 
        if (IS_GEN9_LP(dev_priv))