evie/android_kernel_oneplus_msm8998
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usb: pd: Update uevent parameters during hard reset

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Ensure that a few of the parameters (SELECTED_PDO, REQUESTED_PDO,
RDO) are properly cleared out during hard reset and a uevent
update is sent to notify userspace clients.

Also, don't reset src_cap_id upon disconnect. This makes it a
a monotonically increasing value upon every connection so that
clients can distinguish when a new PD session is established.
Demote it to a u16 in order to have a smaller wraparound (65535).

Change-Id: I622ad1155b3680d3f616d5e9a835d4c6cbca3636
Signed-off-by: Jack Pham <jackp@codeaurora.org>
This commit is contained in:
Jack Pham 2017-01-31 15:23:56 -08:00
parent 47fdec0cf1
commit da9c7fa2a5
1 changed files with 11 additions and 2 deletions
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13
drivers/usb/pd/policy_engine.c
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@ -309,7 +309,7 @@ struct usbpd {
spinlock_t rx_lock;
u32 received_pdos[7];
int src_cap_id;
u16 src_cap_id;
u8 selected_pdo;
u8 requested_pdo;
u32 rdo; /* can be either source or sink */
@ -1551,9 +1551,9 @@ static void usbpd_sm(struct work_struct *w)
pd->hard_reset_recvd = false;
pd->caps_count = 0;
pd->hard_reset_count = 0;
pd->src_cap_id = 0;
pd->requested_voltage = 0;
pd->requested_current = 0;
pd->selected_pdo = pd->requested_pdo = 0;
memset(&pd->received_pdos, 0, sizeof(pd->received_pdos));
rx_msg_cleanup(pd);
@ -1621,8 +1621,12 @@ static void usbpd_sm(struct work_struct *w)
POWER_SUPPLY_PROP_PD_IN_HARD_RESET, &val);
pd->in_pr_swap = false;
pd->in_explicit_contract = false;
pd->selected_pdo = pd->requested_pdo = 0;
pd->rdo = 0;
rx_msg_cleanup(pd);
reset_vdm_state(pd);
kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE);
if (pd->current_pr == PR_SINK) {
usbpd_set_state(pd, PE_SNK_TRANSITION_TO_DEFAULT);
@ -1845,8 +1849,10 @@ static void usbpd_sm(struct work_struct *w)
pd_send_hard_reset(pd);
pd->in_explicit_contract = false;
pd->rdo = 0;
rx_msg_cleanup(pd);
reset_vdm_state(pd);
kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE);
pd->current_state = PE_SRC_TRANSITION_TO_DEFAULT;
kick_sm(pd, PS_HARD_RESET_TIME);
@ -2166,7 +2172,10 @@ static void usbpd_sm(struct work_struct *w)
pd_send_hard_reset(pd);
pd->in_explicit_contract = false;
pd->selected_pdo = pd->requested_pdo = 0;
pd->rdo = 0;
reset_vdm_state(pd);
kobject_uevent(&pd->dev.kobj, KOBJ_CHANGE);
usbpd_set_state(pd, PE_SNK_TRANSITION_TO_DEFAULT);
break;