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Subject[RESEND][PATCH 04/10] tools/power/x86/intel-speed-select: Refuse to disable core-power when getting used
Date
The turbo-freq feature is dependent on the core-power feature. If the
core-power feature is disabled while the turbo-freq feature is enabled,
this will break the turbo-freq feature. This is a firmware limitation,
where they can't return error under this scenario.

So when trying to disable core-power, make sure that the turbo-freq
feature is not enabled. If it enabled, return error if user is trying to
disable the core-power feature.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
.../power/x86/intel-speed-select/isst-core.c | 21 +++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/tools/power/x86/intel-speed-select/isst-core.c b/tools/power/x86/intel-speed-select/isst-core.c
index 6dee5332c9d3..67d32f2b9bea 100644
--- a/tools/power/x86/intel-speed-select/isst-core.c
+++ b/tools/power/x86/intel-speed-select/isst-core.c
@@ -649,6 +649,27 @@ int isst_pm_qos_config(int cpu, int enable_clos, int priority_type)
unsigned int req, resp;
int ret;

+ if (!enable_clos) {
+ struct isst_pkg_ctdp pkg_dev;
+ struct isst_pkg_ctdp_level_info ctdp_level;
+
+ ret = isst_get_ctdp_levels(cpu, &pkg_dev);
+ if (ret) {
+ debug_printf("isst_get_ctdp_levels\n");
+ return ret;
+ }
+
+ ret = isst_get_ctdp_control(cpu, pkg_dev.current_level,
+ &ctdp_level);
+ if (ret)
+ return ret;
+
+ if (ctdp_level.fact_enabled) {
+ debug_printf("Turbo-freq feature must be disabled first\n");
+ return -EINVAL;
+ }
+ }
+
ret = isst_send_mbox_command(cpu, CONFIG_CLOS, CLOS_PM_QOS_CONFIG, 0, 0,
&resp);
if (ret)
--
2.17.2
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