Grab the stepping info from RUNTIME_INFO(dev_priv)->step
on the dmc side to grab the right blob.
Adding the helper intel_get_soc_info() that has SOC stepping
lookup table.

Cc: Lucas De Marchi <lucas.demar...@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.sriva...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dmc.c | 113 ++++++++++++++++++++++-
 1 file changed, 109 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c 
b/drivers/gpu/drm/i915/display/intel_dmc.c
index f8789d4543bf..1b2e01adac48 100644
--- a/drivers/gpu/drm/i915/display/intel_dmc.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc.c
@@ -266,14 +266,119 @@ static const struct stepping_info icl_stepping_info[] = {
 };
 
 static const struct stepping_info no_stepping_info = { '*', '*' };
+struct stepping_info *soc;
+
+static struct stepping_info *
+intel_get_soc_stepping(struct intel_step_info step)
+{
+
+       switch (step.soc_step) {
+               case STEP_A0:
+                       soc->stepping = 'A';
+                       soc->substepping = '0';
+                       break;
+               case STEP_A2:
+                       soc->stepping = 'A';
+                       soc->substepping = '2';
+                       break;
+               case STEP_B0:
+                       soc->stepping = 'B';
+                       soc->substepping = '0';
+                       break;
+               case STEP_B1:
+                       soc->stepping = 'B';
+                       soc->substepping = '1';
+                       break;
+               case STEP_B2:
+                       soc->stepping = 'B';
+                       soc->substepping = '2';
+                       break;
+               case STEP_B10:
+                       soc->stepping = 'B';
+                       soc->substepping = 'A';
+                       break;
+               case STEP_C0:
+                       soc->stepping = 'C';
+                       soc->substepping = '0';
+                       break;
+               case STEP_D0:
+                       soc->stepping = 'D';
+                       soc->substepping = '0';
+                       break;
+               case STEP_D1:
+                       soc->stepping = 'D';
+                       soc->substepping = '1';
+                       break;
+               case STEP_E0:
+                       soc->stepping = 'E';
+                       soc->substepping = '0';
+                       break;
+               case STEP_F0:
+                       soc->stepping = 'F';
+                       soc->substepping = '0';
+                       break;
+               case STEP_G0:
+                       soc->stepping = 'G';
+                       soc->substepping = '0';
+                       break;
+               case STEP_H0:
+                       soc->stepping = 'H';
+                       soc->substepping = '0';
+                       break;
+               case STEP_H5:
+                       soc->stepping = 'H';
+                       soc->substepping = '5';
+                       break;
+               case STEP_J0:
+                       soc->stepping = 'J';
+                       soc->substepping = '0';
+                       break;
+               case STEP_J1:
+                       soc->stepping = 'J';
+                       soc->substepping = '1';
+                       break;
+               case STEP_K0:
+                       soc->stepping = 'K';
+                       soc->substepping = '0';
+                       break;
+               case STEP_P0:
+                       soc->stepping = 'L';
+                       soc->substepping = '0';
+                       break;
+               case STEP_L0:
+                       soc->stepping = 'P';
+                       soc->substepping = '0';
+                       break;
+               case STEP_Q0:
+                       soc->stepping = 'Q';
+                       soc->substepping = '0';
+                       break;
+               case STEP_R0:
+                       soc->stepping = 'R';
+                       soc->substepping = '0';
+                       break;
+               case STEP_Y0:
+                       soc->stepping = 'Y';
+                       soc->substepping = '0';
+                       break;
+               default:
+                       soc->stepping = '*';
+                       soc->substepping = '*';
+                       break;
+       }
+       return soc;
+}
 
 static const struct stepping_info *
 intel_get_stepping_info(struct drm_i915_private *dev_priv)
 {
        const struct stepping_info *si;
+       struct intel_step_info step = RUNTIME_INFO(dev_priv)->step;
        unsigned int size;
 
-       if (IS_ICELAKE(dev_priv)) {
+       if (DISPLAY_VER(dev_priv) >= 12) {
+               si = intel_get_soc_stepping(step);
+       } else if (IS_ICELAKE(dev_priv)) {
                size = ARRAY_SIZE(icl_stepping_info);
                si = icl_stepping_info;
        } else if (IS_SKYLAKE(dev_priv)) {
@@ -287,10 +392,10 @@ intel_get_stepping_info(struct drm_i915_private *dev_priv)
                si = NULL;
        }
 
-       if (INTEL_REVID(dev_priv) < size)
-               return si + INTEL_REVID(dev_priv);
+       if (DISPLAY_VER(dev_priv) < 12)
+               return INTEL_REVID(dev_priv) < size ? si + 
INTEL_REVID(dev_priv) : &no_stepping_info;
 
-       return &no_stepping_info;
+       return si;
 }
 
 static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv)
-- 
2.32.0

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