drm/i915/gen9_bc: Recognize TGP PCH + CML combos

Since Intel has introduced the gen9_bc platform, a combination of
Tigerpoint PCHs and CML CPUs, let's recognize such platforms as valid and
avoid WARNing on them.

Changes since v4:
* Split this into it's own patch - vsyrjala

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
[originally from Tejas's work]
Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210209212832.1401815-2-lyude@redhat.com

diff --git a/drivers/gpu/drm/i915/intel_pch.c b/drivers/gpu/drm/i915/intel_pch.c
index 4813207..7476f0e 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pch.c
+++ b/drivers/gpu/drm/i915/intel_pch.c
@@ -121,7 +121,8 @@ intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
        case INTEL_PCH_TGP2_DEVICE_ID_TYPE:
                drm_dbg_kms(&dev_priv->drm, "Found Tiger Lake LP PCH\n");
                drm_WARN_ON(&dev_priv->drm, !IS_TIGERLAKE(dev_priv) &&
-                           !IS_ROCKETLAKE(dev_priv));
+                           !IS_ROCKETLAKE(dev_priv) &&
+                           !IS_GEN9_BC(dev_priv));
                return PCH_TGP;
        case INTEL_PCH_JSP_DEVICE_ID_TYPE:
        case INTEL_PCH_JSP2_DEVICE_ID_TYPE: