tools/intel_vbt_decode: Clean up SSC freq decoding

Use the same logic as we use in the kernel to decode
the SSC frequency.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

1 files changed, 20 insertions, 26 deletions

diff --git a/tools/intel_vbt_decode.c b/tools/intel_vbt_decode.c
index c626f0e9..a91273d8 100644
--- a/tools/intel_vbt_decode.c
+++ b/tools/intel_vbt_decode.c
@@ -138,6 +138,19 @@ static struct bdb_block *find_section(struct context *context, int section_id)
 	return NULL;
 }
 
+static int decode_ssc_freq(struct context *context, bool alternate)
+{
+	switch (intel_gen(context->devid)) {
+	case 2:
+		return alternate ? 66 : 48;
+	case 3:
+	case 4:
+		return alternate ? 100 : 96;
+	default:
+		return alternate ? 100 : 120;
+	}
+}
+
 static void dump_general_features(struct context *context,
 				  const struct bdb_block *block)
 {
@@ -164,21 +177,10 @@ static void dump_general_features(struct context *context,
 	printf("\tDVO color flip required: %s\n", YESNO(features->color_flip));
 
 	printf("\tExternal VBT: %s\n", YESNO(features->download_ext_vbt));
-	printf("\tEnable SSC: %s\n", YESNO(features->enable_ssc));
-	if (features->enable_ssc) {
-		if (!context->devid)
-			printf("\tSSC frequency: <unknown platform>\n");
-		else if (IS_VALLEYVIEW(context->devid) ||
-			 IS_CHERRYVIEW(context->devid) ||
-			 IS_BROXTON(context->devid))
-			printf("\tSSC frequency: 100 MHz\n");
-		else if (HAS_PCH_SPLIT(context->devid))
-			printf("\tSSC frequency: %s\n", features->ssc_freq ?
-			       "100 MHz" : "120 MHz");
-		else
-			printf("\tSSC frequency: %s\n", features->ssc_freq ?
-			       "100 MHz (66 MHz on 855)" : "96 MHz (48 MHz on 855)");
-	}
+	printf("\tLVDS SSC Enable: %s\n", YESNO(features->enable_ssc));
+	printf("\tLVDS SSC frequency: %d MHz (0x%x)\n",
+	       decode_ssc_freq(context, features->ssc_freq),
+	       features->ssc_freq);
 	printf("\tLFP on override: %s\n",
 	       YESNO(features->enable_lfp_on_override));
 	printf("\tDisable SSC on clone: %s\n",
@@ -210,17 +212,9 @@ static void dump_general_features(struct context *context,
 	printf("\tIntegrated TV: %s\n", YESNO(features->int_tv_support));
 	printf("\tIntegrated EFP: %s\n", YESNO(features->int_efp_support));
 	printf("\tDP SSC enable: %s\n", YESNO(features->dp_ssc_enable));
-	if (features->dp_ssc_enable) {
-		if (IS_VALLEYVIEW(context->devid) || IS_CHERRYVIEW(context->devid) ||
-		    IS_BROXTON(context->devid))
-			printf("\tSSC frequency: 100 MHz\n");
-		else if (HAS_PCH_SPLIT(context->devid))
-			printf("\tSSC frequency: %s\n", features->dp_ssc_freq ?
-			       "100 MHz" : "120 MHz");
-		else
-			printf("\tSSC frequency: %s\n", features->dp_ssc_freq ?
-			       "100 MHz" : "96 MHz");
-	}
+	printf("\tDP SSC frequency: %d MHz (0x%x)\n",
+	       decode_ssc_freq(context, features->dp_ssc_freq),
+	       features->dp_ssc_freq);
 	printf("\tDP SSC dongle supported: %s\n", YESNO(features->dp_ssc_dongle_supported));
 }