[PATCH i-g-t v5 5/7] tools/vbt_decode: parse & dump VS/PE-O tables for Snps

["Michał Grzelak" <michal.grzelak@intel.com>]

Dump VBT #57 tables for Snps. Add a table of strings to store each table
purpose. Show the affected modes on dumping.

v2->v3
- use Cx0 for Snps

v1->v2
- check platform basing on devid not VBT signature (Jani)

Signed-off-by: Michał Grzelak <michal.grzelak@intel.com>
---
 tools/intel_vbt_decode.c | 42 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/tools/intel_vbt_decode.c b/tools/intel_vbt_decode.c
index 2f3f720573..8d54b113ad 100644
--- a/tools/intel_vbt_decode.c
+++ b/tools/intel_vbt_decode.c
@@ -3474,6 +3474,15 @@ static const char * const vspeo_lt_tables[6] = {
 	"DP 2.1",
 };
 
+static const char * const vspeo_cx0_tables[6] = {
+	"C10: DP 1.4 RBR/HBR; C20: UNUSED",
+	"C10: DP 1.4 HBR2/HBR3; C20: UNUSED",
+	"C10: eDP non-HBR3; C20: UNUSED",
+	"C10: eDP HBR3; C20: UNUSED",
+	"C10: UNUSED; C20: DP 1.4",
+	"C10: UNUSED; C20: DP 2.X",
+};
+
 static void dump_lt_vspeo(const struct bdb_vswing_preemph *vspeo,
 			  int num_rows)
 {
@@ -3503,6 +3512,34 @@ static void dump_lt_vspeo(const struct bdb_vswing_preemph *vspeo,
 	}
 }
 
+static void dump_cx0_vspeo(const struct bdb_vswing_preemph *vspeo,
+			   int num_rows)
+{
+	const unsigned int *tables = vspeo->tables;
+	size_t offset = 0;
+
+	printf("\tNumber of vswing tables: %d\n", vspeo->num_tables);
+	printf("\tNumber of columns: %d\n", vspeo->num_columns);
+	printf("\tNumber of rows: %d\n", num_rows);
+
+	printf("\tPHY type: Cx0\n");
+	for (int idx = 0; idx < vspeo->num_tables; idx++) {
+		printf("\tVswing Table #%d (%s):\n", idx+1, vspeo_cx0_tables[idx]);
+		for (int row = 0; row < num_rows; row++) {
+			int vswing = tables[offset];
+			int pre_cursor = tables[offset + 1];
+			int post_cursor = tables[offset + 2];
+
+			printf("\t\tPreset #%02d: ", row+1);
+			printf("vswing: 0x%08x, ", vswing);
+			printf("pre-cursor: 0x%08x, ", pre_cursor);
+			printf("post-cursor: 0x%08x\n", post_cursor);
+
+			offset += vspeo->num_columns;
+		}
+	}
+}
+
 static int
 vswing_preemph_num_rows(int devid)
 {
@@ -3525,6 +3562,11 @@ static void dump_vswing_preemphasis(struct context *context,
 
 	if (IS_NOVALAKE_P(devid) || IS_NOVALAKE_S(devid)) {
 		dump_lt_vspeo(vspeo, num_rows);
+	} else if (IS_PANTHERLAKE(devid) ||
+		   IS_BATTLEMAGE(devid) ||
+		   IS_LUNARLAKE(devid) ||
+		   IS_METEORLAKE(devid)) {
+		dump_cx0_vspeo(vspeo, num_rows);
 	} else {
 		printf("Warning: deparsing VS/PE-O from devid %x not supported\n", devid);
 	}
-- 
2.45.2