This patch is a further update for rdo based on [1], which removed max_snk_ma/mv/mw but kept operating_snk_mw. operating_snk_mw is only used to judge capability mismatch, per PD spec, we can achieve this via compare the selected source PDO and matching sink PDO, also after patch [1], we don't limit the PDO matching between the same type, so the rdo operating and max current/power calculation should be updated accordingly.
[1]https://patchwork.kernel.org/patch/10342299/ Signed-off-by: Li Jun <jun...@nxp.com> --- drivers/usb/typec/tcpm.c | 52 ++++++++++++++++++++++++++++++------------------ 1 file changed, 33 insertions(+), 19 deletions(-) diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 27192083..0be04b3 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -1854,28 +1854,42 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) else mv = pdo_min_voltage(pdo); - /* Select maximum available current within the sink pdo's limit */ - if (type == PDO_TYPE_BATT) { - mw = min_power(pdo, matching_snk_pdo); - ma = 1000 * mw / mv; - } else { - ma = min_current(pdo, matching_snk_pdo); - mw = ma * mv / 1000; - } - flags = RDO_USB_COMM | RDO_NO_SUSPEND; - /* Set mismatch bit if offered power is less than operating power */ - max_ma = ma; - max_mw = mw; - if (mw < port->operating_snk_mw) { - flags |= RDO_CAP_MISMATCH; - if (type == PDO_TYPE_BATT && - (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) - max_mw = pdo_max_power(matching_snk_pdo); - else if (pdo_max_current(matching_snk_pdo) > - pdo_max_current(pdo)) + switch (type) { + case PDO_TYPE_FIXED: + case PDO_TYPE_VAR: + if (pdo_type(matching_snk_pdo) == PDO_TYPE_BATT) + max_ma = pdo_max_power(matching_snk_pdo) * 1000 / mv; + else max_ma = pdo_max_current(matching_snk_pdo); + + if (max_ma > pdo_max_current(pdo)) { + flags |= RDO_CAP_MISMATCH; + ma = pdo_max_current(pdo); + } else { + ma = max_ma; + } + break; + case PDO_TYPE_BATT: + if (pdo_type(matching_snk_pdo) == PDO_TYPE_BATT) + max_mw = pdo_max_power(matching_snk_pdo); + else + max_mw = pdo_max_current(matching_snk_pdo) * + pdo_min_voltage(matching_snk_pdo) / + 1000; + + if (max_mw > pdo_max_power(pdo)) { + flags |= RDO_CAP_MISMATCH; + mw = pdo_max_power(pdo); + } else { + mw = max_mw; + } + + ma = mw * 1000 / mv; + break; + default: + break; } tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
