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usb: typec: tcpm: fusb302: fix pd rx packet loss

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This amends the following points:
 - pull all RX messages from FIFO to TCPM while packet received and
   GoodCRC sent.
 - for TX success alert, just complete the tx status and GoodCRC will
   be read out at RX process (GCRCSENT alert).

The above changes can fix the Source Caps packets may loss in PD
renegotiate stage probably.

Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Change-Id: I0422449842fd24e42e398a38446dc00477c7acce
This commit is contained in:
Frank Wang
2023-02-20 10:02:50 +08:00
committed by Tao Huang
parent 8dc7042e4b
commit 99321070f1
1 changed files with 18 additions and 11 deletions
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29
drivers/usb/typec/tcpm/fusb302.c
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@@ -389,6 +389,14 @@ static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode)
return ret;
}
static int fusb302_rx_fifo_is_empty(struct fusb302_chip *chip)
{
u8 data;
return (fusb302_i2c_read(chip, FUSB_REG_STATUS1, &data) > 0) &&
(data & FUSB_REG_STATUS1_RX_EMPTY);
}
static int tcpm_init(struct tcpc_dev *dev)
{
struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
@@ -1594,12 +1602,7 @@ static void fusb302_irq_work(struct kthread_work *work)
if (interrupta & FUSB_REG_INTERRUPTA_TX_SUCCESS) {
fusb302_log(chip, "IRQ: PD tx success");
ret = fusb302_pd_read_message(chip, &pd_msg);
if (ret < 0) {
fusb302_log(chip,
"cannot read in PD message, ret=%d", ret);
goto done;
}
tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS);
}
if (interrupta & FUSB_REG_INTERRUPTA_HARDRESET) {
@@ -1614,11 +1617,15 @@ static void fusb302_irq_work(struct kthread_work *work)
if (interruptb & FUSB_REG_INTERRUPTB_GCRCSENT) {
fusb302_log(chip, "IRQ: PD sent good CRC");
ret = fusb302_pd_read_message(chip, &pd_msg);
if (ret < 0) {
fusb302_log(chip,
"cannot read in PD message, ret=%d", ret);
goto done;
while (!fusb302_rx_fifo_is_empty(chip)) {
memset(&pd_msg, 0, sizeof(struct pd_message));
ret = fusb302_pd_read_message(chip, &pd_msg);
if (ret < 0) {
fusb302_log(chip,
"cannot read in PD message, ret=%d", ret);
goto done;
}
}
}
done: