drm/i915/adl_s: Add PCH support

Add support for Alderpoint(ADP) PCH used with Alderlake-S.

v2:
- Use drm_dbg_kms and drm_WARN_ON based on Jani's feedback.(aswarup)

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Caz Yokoyama <caz.yokoyama@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Aditya Swarup <aditya.swarup@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210125140753.347998-3-aditya.swarup@intel.com

diff --git a/drivers/gpu/drm/i915/intel_pch.c b/drivers/gpu/drm/i915/intel_pch.c
index f31c0da..2a6d70f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pch.c
+++ b/drivers/gpu/drm/i915/intel_pch.c
@@ -128,6 +128,10 @@ intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
                drm_dbg_kms(&dev_priv->drm, "Found Jasper Lake PCH\n");
                drm_WARN_ON(&dev_priv->drm, !IS_JSL_EHL(dev_priv));
                return PCH_JSP;
+       case INTEL_PCH_ADP_DEVICE_ID_TYPE:
+               drm_dbg_kms(&dev_priv->drm, "Found Alder Lake PCH\n");
+               drm_WARN_ON(&dev_priv->drm, !IS_ALDERLAKE_S(dev_priv));
+               return PCH_ADP;
        default:
                return PCH_NONE;
        }
@@ -155,7 +159,9 @@ intel_virt_detect_pch(const struct drm_i915_private *dev_priv)
         * make an educated guess as to which PCH is really there.
         */
 
-       if (IS_TIGERLAKE(dev_priv) || IS_ROCKETLAKE(dev_priv))
+       if (IS_ALDERLAKE_S(dev_priv))
+               id = INTEL_PCH_ADP_DEVICE_ID_TYPE;
+       else if (IS_TIGERLAKE(dev_priv) || IS_ROCKETLAKE(dev_priv))
                id = INTEL_PCH_TGP_DEVICE_ID_TYPE;
        else if (IS_JSL_EHL(dev_priv))
                id = INTEL_PCH_MCC_DEVICE_ID_TYPE;

diff --git a/drivers/gpu/drm/i915/intel_pch.h b/drivers/gpu/drm/i915/intel_pch.h
index 06d2cd5..7318377 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pch.h
+++ b/drivers/gpu/drm/i915/intel_pch.h
@@ -26,6 +26,7 @@ enum intel_pch {
        PCH_JSP,        /* Jasper Lake PCH */
        PCH_MCC,        /* Mule Creek Canyon PCH */
        PCH_TGP,        /* Tiger Lake PCH */
+       PCH_ADP,        /* Alder Lake PCH */
 
        /* Fake PCHs, functionality handled on the same PCI dev */
        PCH_DG1 = 1024,
@@ -53,12 +54,14 @@ enum intel_pch {
 #define INTEL_PCH_TGP2_DEVICE_ID_TYPE          0x4380
 #define INTEL_PCH_JSP_DEVICE_ID_TYPE           0x4D80
 #define INTEL_PCH_JSP2_DEVICE_ID_TYPE          0x3880
+#define INTEL_PCH_ADP_DEVICE_ID_TYPE           0x7A80
 #define INTEL_PCH_P2X_DEVICE_ID_TYPE           0x7100
 #define INTEL_PCH_P3X_DEVICE_ID_TYPE           0x7000
 #define INTEL_PCH_QEMU_DEVICE_ID_TYPE          0x2900 /* qemu q35 has 2918 */
 
 #define INTEL_PCH_TYPE(dev_priv)               ((dev_priv)->pch_type)
 #define INTEL_PCH_ID(dev_priv)                 ((dev_priv)->pch_id)
+#define HAS_PCH_ADP(dev_priv)                  (INTEL_PCH_TYPE(dev_priv) == PCH_ADP)
 #define HAS_PCH_DG1(dev_priv)                  (INTEL_PCH_TYPE(dev_priv) == PCH_DG1)
 #define HAS_PCH_JSP(dev_priv)                  (INTEL_PCH_TYPE(dev_priv) == PCH_JSP)
 #define HAS_PCH_MCC(dev_priv)                  (INTEL_PCH_TYPE(dev_priv) == PCH_MCC)