[PATCH i-g-t 24/27] tools/intel_vbt_decode: Decode block 57 (Vswing PreEmphasis Table)

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Decode VBT block 57 (Vswing PreEmphasis Table). The colums of
the tables correspond to specific registers (mapping is platform
specific), the rows correspond to vswing/preemphasis combos, and
the individual table is supposed to selected using platform specific
logic baed on PHY type, link rate, low vswing, etc.

Example outout from TGL:
BDB block 57 (2642 bytes, min 2 bytes) - Vswing Preemph:
        0000: 39 52 0a 06 0b 0a 00 00  00 4c 00 00 00 3f 00 00
        0010: 00 00 00 00 00 00 00 00  00 98 00 00 00 06 00 00
        0020: 00 01 00 00 00 00 00 00  00 00 00 00 00 00 00 00
        0030: 00 0a 00 00 00 4c 00 00  00 3f 00 00 00 00 00 00
        ...
        0a00: 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
        0a10: 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
        0a20: 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
        0a30: 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
        0a40: 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
        0a50: 00 00 00 00 00

        Number of vswing tables: 6
        Number of columns: 11
        Vswing Table #1:
                V0-P0:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V0-P1:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V0-P2:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V0-P3:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V1-P0:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V1-P1:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V1-P2:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V2-P0:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V2-P1:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
                V3-P0:  0x0000000a 0x0000004c 0x0000003f 0x00000000 0x00000000 0x00000098 0x00000006 0x00000001 0x00000000 0x00000000 0x00000000
        ...
        Vswing Table #6:
                V0-P0:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V0-P1:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V0-P2:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V0-P3:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V1-P0:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V1-P1:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V1-P2:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V2-P0:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V2-P1:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
                V3-P0:  0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 tools/intel_vbt_decode.c | 41 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/tools/intel_vbt_decode.c b/tools/intel_vbt_decode.c
index 85f31f449130..58bdba0e96d2 100644
--- a/tools/intel_vbt_decode.c
+++ b/tools/intel_vbt_decode.c
@@ -418,6 +418,8 @@ static size_t block_min_size(const struct context *context, int section_id)
 		return sizeof(struct bdb_rgb_palette);
 	case BDB_COMPRESSION_PARAMETERS:
 		return sizeof(struct bdb_compression_parameters);
+	case BDB_VSWING_PREEMPH:
+		return sizeof(struct bdb_vswing_preemph);
 	case BDB_GENERIC_DTD:
 		/* FIXME check spec */
 		return sizeof(struct bdb_generic_dtd);
@@ -3413,6 +3415,40 @@ static void dump_compression_parameters(struct context *context,
 	}
 }
 
+static const char * const vswing_preemph[10] = {
+	"V0-P0",
+	"V0-P1",
+	"V0-P2",
+	"V0-P3",
+	"V1-P0",
+	"V1-P1",
+	"V1-P2",
+	"V2-P0",
+	"V2-P1",
+	"V3-P0",
+};
+
+static void dump_vswing_preemphasis(struct context *context,
+				    const struct bdb_block *block)
+{
+	const struct bdb_vswing_preemph *vs = block_data(block);
+
+	printf("\tNumber of vswing tables: %d\n", vs->num_tables);
+	printf("\tNumber of columns: %d\n", vs->num_columns);
+
+	for (int n = 0; n < vs->num_tables; n++) {
+		printf("\tVswing Table #%d:\n", n+1);
+
+		for (int i = 0; i < 10; i++) {
+			printf("\t\t%s: ", vswing_preemph[i]);
+
+			for (int j = 0; j < vs->num_columns; j++)
+				printf(" 0x%08x", vs->tables[n * 10 * vs->num_columns + j]);
+			printf("\n");
+		}
+	}
+}
+
 static int get_panel_type_pnpid(const struct context *context,
 				const char *edid_file)
 {
@@ -3761,6 +3797,11 @@ struct dumper dumpers[] = {
 		.name = "Compression parameters block",
 		.dump = dump_compression_parameters,
 	},
+	{
+		.id = BDB_VSWING_PREEMPH,
+		.name = "Vswing Preemph",
+		.dump = dump_vswing_preemphasis,
+	},
 };
 
 static void hex_dump_block(const struct bdb_block *block)
-- 
2.44.2