tools/power/x86/intel-speed-select: Improve error display for turbo-freq feature

This change adds improved error display and handling for commands related
to turbo-freq feature. The changes include:
- Replace perror/fprintf with helpful error message
- Error for not specifying TDP level when required
- Show error for invalid bucket number
- Show message to enable core-power before enabling turbo-freq feature

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/tools/power/x86/intel-speed-select/isst-display.c b/tools/power/x86/intel-speed-select/isst-display.c
index 0667b405f17f..bf9422336fab 100644
--- a/tools/power/x86/intel-speed-select/isst-display.c
+++ b/tools/power/x86/intel-speed-select/isst-display.c
@@ -222,7 +222,21 @@ static void _isst_fact_display_information(int cpu, FILE *outf, int level,
 	struct isst_fact_bucket_info *bucket_info = fact_info->bucket_info;
 	char header[256];
 	char value[256];
-	int j;
+	int print = 0, j;
+
+	for (j = 0; j < ISST_FACT_MAX_BUCKETS; ++j) {
+		if (fact_bucket != 0xff && fact_bucket != j)
+			continue;
+
+		if (!bucket_info[j].high_priority_cores_count)
+			break;
+
+		print = 1;
+	}
+	if (!print) {
+		fprintf(stderr, "Invalid bucket\n");
+		return;
+	}
 
 	snprintf(header, sizeof(header), "speed-select-turbo-freq-properties");
 	format_and_print(outf, base_level, header, NULL);