[igt-dev] [PATCH i-g-t v14 6/6] tests/i915/i915_pm_dc:Skip the DC6 test if BIOS has disabled PC8+

Anshuman Gupta
2019-09-06T14:12:24Z

As DC6 requires platform to enter PC8 package C state.
It make sense to skip the DC6 igt-test, if BIOS configuration
has disabled PC8+ package C states.

Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
---
tests/i915/i915_pm_dc.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c
index b93466a7..86c12adf 100644
--- a/tests/i915/i915_pm_dc.c
+++ b/tests/i915/i915_pm_dc.c
@@ -23,10 +23,12 @@
*/

#include <errno.h>
+#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "igt.h"
+#include "igt_kmod.h"
#include "igt_psr.h"
#include "igt_sysfs.h"
#include "limits.h"
@@ -37,6 +39,7 @@

typedef struct {
int drm_fd;
+ int msr_fd;
int debugfs_fd;
uint32_t devid;
igt_display_t display;
@@ -253,6 +256,12 @@ int main(int argc, char *argv[])
igt_require(has_runtime_pm);
igt_require(igt_pm_dmc_loaded(data.debugfs_fd));
igt_display_require(&data.display, data.drm_fd);
+ /* Make sure our Kernel supports MSR and the module is loaded */
+ igt_require(igt_kmod_load("msr", NULL) == 0);
+
+ data.msr_fd = open("/dev/cpu/0/msr", O_RDONLY);
+ igt_assert_f(data.msr_fd >= 0,
+ "Can't open /dev/cpu/0/msr.\n");
}

igt_describe("DC5 igt test with PSR Sleep state");
@@ -270,6 +279,8 @@ int main(int argc, char *argv[])
psr_enable(data.debugfs_fd, data.op_psr_mode);
igt_require_f(edp_psr_sink_support(&data),
"Sink does not support PSR\n");
+ igt_require_f(is_bios_limits_pc8_plus_residencies(data.msr_fd),
+ "PC8+ residencies not supported\n");
test_dc_state_psr(&data, CHECK_DC6);
}

@@ -280,11 +291,14 @@ int main(int argc, char *argv[])

igt_describe("DC6 igt test with all connectors DPMS OFF/ON");
igt_subtest("dc6-dpms") {
+ igt_require_f(is_bios_limits_pc8_plus_residencies(data.msr_fd),
+ "PC8+ residencies not supported\n");
test_dc_state_dpms(&data, CHECK_DC6);
}

igt_fixture {
close(data.debugfs_fd);
+ close(data.msr_fd);
display_fini(&data);