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platform/chrome: cros_ec_typec: Configure muxes at start of port update

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There are situations where the mux state reported by the Embedded
Controller (EC), might lag the partner "connected" state. So, the mux
state might still suggest that a partner is connected, while the PD
"connected" state, being in Try.SNK (for example) suggests that the
partner is disconnected.

In such a scenario, we will end up sending a disconnect command to the
mux driver, followed by a connect command, since the mux is configured
later. Avoid this by configuring the mux before
registering/disconnecting a partner.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/chrome-platform/20220208184721.1697194-4-pmalani@chromium.org/
This commit is contained in:
Prashant Malani 2022-02-08 18:47:22 +00:00
parent 0d8495dc03
commit af34f115b3
1 changed files with 6 additions and 6 deletions
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12
drivers/platform/chrome/cros_ec_typec.c
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@ -965,6 +965,11 @@ static int cros_typec_port_update(struct cros_typec_data *typec, int port_num)
if (ret < 0)
return ret;
/* Update the switches if they exist, according to requested state */
ret = cros_typec_configure_mux(typec, port_num, &resp);
if (ret)
dev_warn(typec->dev, "Configure muxes failed, err = %d\n", ret);
dev_dbg(typec->dev, "Enabled %d: 0x%hhx\n", port_num, resp.enabled);
dev_dbg(typec->dev, "Role %d: 0x%hhx\n", port_num, resp.role);
dev_dbg(typec->dev, "Polarity %d: 0x%hhx\n", port_num, resp.polarity);
@ -980,12 +985,7 @@ static int cros_typec_port_update(struct cros_typec_data *typec, int port_num)
if (typec->typec_cmd_supported)
cros_typec_handle_status(typec, port_num);
/* Update the switches if they exist, according to requested state */
ret = cros_typec_configure_mux(typec, port_num, &resp);
if (ret)
dev_warn(typec->dev, "Configure muxes failed, err = %d\n", ret);
return ret;
return 0;
}
static int cros_typec_get_cmd_version(struct cros_typec_data *typec)