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| author | Wyes Karny <wyes.karny@amd.com> | 2023-03-30 14:13:14 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-04-11 20:44:25 +0200 |
| commit | 4654e9f9f43993eb9ce383fa7c88d14b052b8cc3 (patch) | |
| tree | ba322ef1b8f12c002515e2bb2a9d6cdef1a9e9ab | |
| parent | 09a9639e56c01c7a00d6c0ca63f4c7c41abe075d (diff) | |
| download | linux-4654e9f9f43993eb9ce383fa7c88d14b052b8cc3.tar.gz | |
amd-pstate: Fix amd_pstate mode switch
amd_pstate mode can be changed by writing the mode name to the `status`
sysfs. But some combinations are not working. Fix this issue by taking
care of the edge cases.
Before the fix the mode change combination test fails:
#./pst_test.sh
Test passed: from: disable, to
Test passed: from: disable, to disable
Test failed: 1, From mode: disable, to mode: passive
Test failed: 1, From mode: disable, to mode: active
Test failed: 1, From mode: passive, to mode: active
Test passed: from: passive, to disable
Test failed: 1, From mode: passive, to mode: passive
Test failed: 1, From mode: passive, to mode: active
Test failed: 1, From mode: active, to mode: active
Test passed: from: active, to disable
Test failed: 1, From mode: active, to mode: passive
Test failed: 1, From mode: active, to mode: active
After the fix test passes:
#./pst_test.sh
Test passed: from: disable, to
Test passed: from: disable, to disable
Test passed: from: disable, to passive
Test passed: from: disable, to active
Test passed: from: passive, to active
Test passed: from: passive, to disable
Test passed: from: passive, to passive
Test passed: from: passive, to active
Test passed: from: active, to active
Test passed: from: active, to disable
Test passed: from: active, to passive
Test passed: from: active, to active
Fixes: abd61c08ef349 ("cpufreq: amd-pstate: add driver working mode switch support")
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alexey Kardashevskiy <aik@amd.com>
Signed-off-by: Wyes Karny <wyes.karny@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpufreq/amd-pstate.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 73c7643b26972b..8dd46fad151eb0 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -840,22 +840,20 @@ static int amd_pstate_update_status(const char *buf, size_t size) switch(mode_idx) { case AMD_PSTATE_DISABLE: - if (!current_pstate_driver) - return -EINVAL; - if (cppc_state == AMD_PSTATE_ACTIVE) - return -EBUSY; - cpufreq_unregister_driver(current_pstate_driver); - amd_pstate_driver_cleanup(); + if (current_pstate_driver) { + cpufreq_unregister_driver(current_pstate_driver); + amd_pstate_driver_cleanup(); + } break; case AMD_PSTATE_PASSIVE: if (current_pstate_driver) { if (current_pstate_driver == &amd_pstate_driver) return 0; cpufreq_unregister_driver(current_pstate_driver); - cppc_state = AMD_PSTATE_PASSIVE; - current_pstate_driver = &amd_pstate_driver; } + current_pstate_driver = &amd_pstate_driver; + cppc_state = AMD_PSTATE_PASSIVE; ret = cpufreq_register_driver(current_pstate_driver); break; case AMD_PSTATE_ACTIVE: @@ -863,10 +861,10 @@ static int amd_pstate_update_status(const char *buf, size_t size) if (current_pstate_driver == &amd_pstate_epp_driver) return 0; cpufreq_unregister_driver(current_pstate_driver); - current_pstate_driver = &amd_pstate_epp_driver; - cppc_state = AMD_PSTATE_ACTIVE; } + current_pstate_driver = &amd_pstate_epp_driver; + cppc_state = AMD_PSTATE_ACTIVE; ret = cpufreq_register_driver(current_pstate_driver); break; default: |