From: Mario Limonciello <mario.limonciello@xxxxxxx> [ Upstream commit b845772677ea19b8e4c032bc07393ef32de4ee39 ] Picasso doesn't support the command in the uPEP mailbox to try to read the SMU version. Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2449 Fixes: f6045de1f532 ("platform/x86: amd-pmc: Export Idlemask values based on the APU") Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> Link: https://lore.kernel.org/r/20230409185348.556161-2-Shyam-sundar.S-k@xxxxxxx Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/platform/x86/amd/pmc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c index 3cbb01ec10e32..0553a6419bb90 100644 --- a/drivers/platform/x86/amd/pmc.c +++ b/drivers/platform/x86/amd/pmc.c @@ -377,6 +377,9 @@ static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev) int rc; u32 val; + if (dev->cpu_id == AMD_CPU_ID_PCO) + return -ENODEV; + rc = amd_pmc_send_cmd(dev, 0, &val, SMU_MSG_GETSMUVERSION, 1); if (rc) return rc; -- 2.39.2
