From: Timur Kristóf Date: Sun, 12 Jul 2026 17:39:28 +0000 (+0200) Subject: drm/amd/pm/smu7: Fix AC/DC switch notification X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ec917f19ff1077709e1c4aa7926c7451106080d0;p=thirdparty%2Fkernel%2Flinux.git drm/amd/pm/smu7: Fix AC/DC switch notification There were two mistakes in the previous implementation: The check for AutomaticDCTransition should be inverted. We recently learned that the kernel should send PPSMC_MSG_RunningOnAC when the flag is set, and not the other way around. The clocks also need to be recomputed, because the code in the smu7_apply_state_adjust_rules() function selects different limits on AC and DC. Fixes: 96da0d86614e ("drm/amd/pm/smu7: Notify SMU7 of DC->AC switch") Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher (cherry picked from commit 516f8fc30a1b56af03f39e93c18707d13419fb1f) Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c index 95bf187f02a5..bc82ba2e4c9b 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c @@ -5857,15 +5857,19 @@ static int smu7_power_off_asic(struct pp_hwmgr *hwmgr) static void smu7_notify_ac_dc(struct pp_hwmgr *hwmgr) { struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev); + const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs; - /* Check if the platform already manages the AC/DC switch via dedicated GPIO. */ - if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps, + /* + * Check if the platform already manages the AC/DC switch via dedicated GPIO. + * Otherwise SMU automatically notices DC, but needs to be notified of AC. + */ + if (adev->pm.ac_power && + phm_cap_enabled(hwmgr->platform_descriptor.platformCaps, PHM_PlatformCaps_AutomaticDCTransition)) - return; - - /* The SMU automatically notices DC, but needs to be notified when switching to AC. */ - if (adev->pm.ac_power) smum_send_msg_to_smc(hwmgr, PPSMC_MSG_RunningOnAC, NULL); + + /* Recompute clocks with updated max_limits. */ + pp_funcs->pm_compute_clocks(adev->powerplay.pp_handle); } static const struct pp_hwmgr_func smu7_hwmgr_funcs = {