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drm/amd/pm/smu7: Fix AC/DC switch notification

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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: 96da0d8661 ("drm/amd/pm/smu7: Notify SMU7 of DC->AC switch")
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 516f8fc30a1b56af03f39e93c18707d13419fb1f)
Cc: stable@vger.kernel.org
This commit is contained in:
Timur Kristóf 2026-07-12 19:39:28 +02:00 committed by Alex Deucher
parent 0148ac3354
commit ec917f19ff
1 changed files with 10 additions and 6 deletions
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16
drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
View File

@ -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 = {