Unfortunately this seems to just be the behavior of many wall chargers, triggered by either an excessive delay between first drawing power and beginning PD communication, or by an incorrect sequence number. From what I've heard, this is a workaround for a bug in the earliest USB-C MacBooks, but it unfortunately makes those chargers unusable for powering anything that doesn't have an internal battery. Suniel Mahesh <sunil@xxxxxxxxxxxxxxxxxxxx> ezt írta (időpont: 2024. jan. 9., K, 8:17): > > Hi Guenter/Heikki/Greg and all, > > This email is a narrowed version of the earlier discussion at: > https://lore.kernel.org/all/CAM+7aWt7hJSmJQ78Fes0jMcrF9E8yhN=sDgYuU-hBxO0+1Uj0g@xxxxxxxxxxxxxx/T/ > > Please guide/suggest on why the FUSB302B port controller on a target board > is getting reset(hard reset) on reception of a 0x0 packet from source(PD Wall > charger 100W - 20V@5A). > > log when reset: > > [ 1.599049] FUSB302: IRQ: 0x80, a: 0x00, b: 0x00, status0: 0x83 > [ 1.602836] FUSB302: IRQ: 0x00, a: 0x40, b: 0x00, status0: 0x83 > [ 1.606210] TCPM: tcpm_pd_event_handler: in TCPM_CC_EVENT > [ 1.968179] FUSB302: IRQ: 0x80, a: 0x00, b: 0x00, status0: 0x83 > [ 2.133140] FUSB302: IRQ: 0x41, a: 0x04, b: 0x00, status0: 0x93 > [ 2.133704] FUSB302: IRQ: PD tx success > [ 2.136046] FUSB302: PD message header: 161 > [ 2.136392] FUSB302: PD message len: 0 > [ 2.136845] TCPM: PD TX complete, status: 0 > [ 2.139382] FUSB302: IRQ: 0x51, a: 0x00, b: 0x00, status0: 0x93 > [ 2.142192] FUSB302: IRQ: 0x51, a: 0x00, b: 0x01, status0: 0x93 > [ 2.142804] FUSB302: IRQ: PD sent good CRC > [ 2.145274] FUSB302: PD message header: 1a3 > [ 2.145674] FUSB302: PD message len: 0 > [ 2.146072] FUSB302: fusb302_pd_read_message: to tcpm_pd_receive > [ 2.146478] TCPM: PD RX, header: 0x1a3 [1] > [ 2.147042] TCPM: tcpm_pd_ctrl_request: type:0x3 > [ 2.147435] TCPM: tcpm_pd_ctrl_request: case PD_CTRL_ACCEPT > [ 2.146309] TCPM: tcpm_pd_ctrl_request: case SOFT_RESET_SEND > [ 2.148266] TCPM: tcpm_pd_rx_handler: done > [ 2.158196] FUSB302: IRQ: 0x51, a: 0x00, b: 0x01, status0: 0x93 > [ 2.158600] FUSB302: IRQ: PD sent good CRC > [ 2.161283] FUSB302: PD message header: 0 > [ 2.161710] FUSB302: PD message len: 0 > [ 2.162092] FUSB302: fusb302_pd_read_message: to tcpm_pd_receive > [ 2.162608] TCPM: PD RX, header: 0x0 [1] > [ 2.163181] TCPM: tcpm_pd_rx_handler: done > [ 2.179843] FUSB302: IRQ: 0x41, a: 0x01, b: 0x00, status0: 0x83 > [ 2.180314] FUSB302: IRQ: PD received hardreset: interrupta: 1 > [ 2.181125] FUSB302: fusb302_pd_reset: > [ 2.182597] TCPM: tcpm_pd_event_handler: > [ 2.182937] TCPM: tcpm_pd_event_handler: TCPM_RESET_EVENT > [ 2.183292] TCPM: _tcpm_pd_hard_reset: Received hard reset > [ 2.183770] TCPM: _tcpm_pd_hard_reset: > > Let me know if you need anymore details. > > Thanks and Regards > -- > Suniel Mahesh > Embedded Linux and Kernel Engineer > Amarula Solutions India >
