drm/i915/adl_p: Add IPs stepping mapping

This will allow us to better implement workarounds.

Cc: Matt Roper <[email protected]>
Signed-off-by: José Roberto de Souza <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Signed-off-by: Matt Roper <[email protected]>
Reviewed-by: Anusha Srivatsa <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: zehortigoza

drivers/gpu/drm/i915/i915_drv.h

@@ -1543,6 +1543,14 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 	(IS_ALDERLAKE_S(__i915) && \
 	 IS_GT_STEP(__i915, since, until))
 
+#define IS_ADLP_DISPLAY_STEP(__i915, since, until) \
+	(IS_ALDERLAKE_P(__i915) && \
+	 IS_DISPLAY_STEP(__i915, since, until))
+
+#define IS_ADLP_GT_STEP(__i915, since, until) \
+	(IS_ALDERLAKE_P(__i915) && \
+	 IS_GT_STEP(__i915, since, until))
+
 #define IS_LP(dev_priv)	(INTEL_INFO(dev_priv)->is_lp)
 #define IS_GEN9_LP(dev_priv)	(IS_GEN(dev_priv, 9) && IS_LP(dev_priv))
 #define IS_GEN9_BC(dev_priv)	(IS_GEN(dev_priv, 9) && !IS_LP(dev_priv))

drivers/gpu/drm/i915/intel_step.c

@@ -47,14 +47,24 @@ static const struct intel_step_info adls_revid_step_tbl[] = {
 	[0xC] = { .gt_step = STEP_D0, .display_step = STEP_C0 },
 };
 
+static const struct intel_step_info adlp_revid_step_tbl[] = {
+	[0x0] = { .gt_step = STEP_A0, .display_step = STEP_A0 },
+	[0x4] = { .gt_step = STEP_B0, .display_step = STEP_B0 },
+	[0x8] = { .gt_step = STEP_C0, .display_step = STEP_C0 },
+	[0xC] = { .gt_step = STEP_C0, .display_step = STEP_D0 },
+};
+
 void intel_step_init(struct drm_i915_private *i915)
 {
 	const struct intel_step_info *revids = NULL;
 	int size = 0;
 	int revid = INTEL_REVID(i915);
 	struct intel_step_info step = {};
 
-	if (IS_ALDERLAKE_S(i915)) {
+	if (IS_ALDERLAKE_P(i915)) {
+		revids = adlp_revid_step_tbl;
+		size = ARRAY_SIZE(adlp_revid_step_tbl);
+	} else if (IS_ALDERLAKE_S(i915)) {
 		revids = adls_revid_step_tbl;
 		size = ARRAY_SIZE(adls_revid_step_tbl);
 	} else if (IS_TGL_U(i915) || IS_TGL_Y(i915)) {