Commit d26d1643 authored by Swapnil Sapkal's avatar Swapnil Sapkal Committed by Mario Limonciello
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amd-pstate-ut: Reset amd-pstate driver mode after running selftests 



In amd-pstate-ut, one of the basic test is to switch between all
possible mode combinations. After running this test the mode of the
amd-pstate driver is active mode. Store and reset the mode to its original
state.

Reviewed-by: default avatarGautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: default avatarSwapnil Sapkal <swapnil.sapkal@amd.com>
Reviewed-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250430064206.7402-1-swapnil.sapkal@amd.com


Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
parent 608a76b6

drivers/cpufreq/amd-pstate-ut.c

+12 −7
Original line number Diff line number Diff line
@@ -242,6 +242,8 @@ static int amd_pstate_set_mode(enum amd_pstate_mode mode) 
static int amd_pstate_ut_check_driver(u32 index)

{

	enum amd_pstate_mode mode1, mode2 = AMD_PSTATE_DISABLE;

	enum amd_pstate_mode orig_mode = amd_pstate_get_status();

	int ret;



	for (mode1 = AMD_PSTATE_DISABLE; mode1 < AMD_PSTATE_MAX; mode1++) {

		int ret = amd_pstate_set_mode(mode1);
@@ -251,16 +253,19 @@ static int amd_pstate_ut_check_driver(u32 index) 
			if (mode1 == mode2)

				continue;

			ret = amd_pstate_set_mode(mode2);

			if (ret) {

				pr_err("%s: failed to update status for %s->%s\n", __func__,

					amd_pstate_get_mode_string(mode1),

					amd_pstate_get_mode_string(mode2));

				return ret;

			}

			if (ret)

				goto out;

		}

	}



	return 0;

out:

	if (ret)

		pr_warn("%s: failed to update status for %s->%s: %d\n", __func__,

			amd_pstate_get_mode_string(mode1),

			amd_pstate_get_mode_string(mode2), ret);



	amd_pstate_set_mode(orig_mode);

	return ret;

}



static int __init amd_pstate_ut_init(void)

drivers/cpufreq/amd-pstate.c

+6 −0
Original line number Diff line number Diff line
@@ -1332,6 +1332,12 @@ static ssize_t amd_pstate_show_status(char *buf) 
	return sysfs_emit(buf, "%s\n", amd_pstate_mode_string[cppc_state]);

}



int amd_pstate_get_status(void)

{

	return cppc_state;

}

EXPORT_SYMBOL_GPL(amd_pstate_get_status);



int amd_pstate_update_status(const char *buf, size_t size)

{

	int mode_idx;

drivers/cpufreq/amd-pstate.h

+1 −0
Original line number Diff line number Diff line
@@ -121,6 +121,7 @@ enum amd_pstate_mode { 
	AMD_PSTATE_MAX,

};

const char *amd_pstate_get_mode_string(enum amd_pstate_mode mode);

int amd_pstate_get_status(void);

int amd_pstate_update_status(const char *buf, size_t size);



#endif /* _LINUX_AMD_PSTATE_H */