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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Oct 2024 12:23:34.9472 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: db082848-9614-4ed2-7e93-08dce46f5e10 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF000001F2.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6826 Content-Type: text/plain; charset="utf-8" While switching the driver mode between active and passive, Collaborative Processor Performance Control (CPPC) is disabled in amd_pstate_unregister_driver(). But, it is not enabled back while registeri= ng the new driver (passive or active). This leads to the new driver mode not working correctly, so enable it back in amd_pstate_register_driver(). Fixes: 3ca7bc818d8c ("cpufreq: amd-pstate: Add guided mode control support = via sysfs") Signed-off-by: Dhananjay Ugwekar Reviewed-by: Mario Limonciello --- drivers/cpufreq/amd-pstate.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index cdc08d2ddd52..4acf5fbeb116 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1191,11 +1191,21 @@ static int amd_pstate_register_driver(int mode) return -EINVAL; =20 cppc_state =3D mode; + + ret =3D amd_pstate_enable(true); + if (ret) { + pr_err("failed to enable cppc during amd-pstate driver registration, ret= urn %d\n", + ret); + amd_pstate_driver_cleanup(); + return ret; + } + ret =3D cpufreq_register_driver(current_pstate_driver); if (ret) { amd_pstate_driver_cleanup(); return ret; } + return 0; } =20 --=20 2.34.1