diff options
| author | Hemant Kumar <hemantk@codeaurora.org> | 2016-05-19 14:32:35 -0700 |
|---|---|---|
| committer | Jack Pham <jackp@codeaurora.org> | 2016-09-26 17:47:44 -0700 |
| commit | 85cc38fca20f3c5b93314aa992ed3863d437bb39 (patch) | |
| tree | 3ad3e3b2aaed84eaeeaeeab6278f5e424e6b2445 /drivers/usb | |
| parent | a5b4466d33d32f015ef8d41d85e0d65116658afc (diff) | |
usb: pd: Add support to set the maximum speed via extcon
Driver sets the speed using extcon cable state flag. This
allows to start host or peripheral in selected speed.
By default start peripheral in super speed mode. However,
starting host in super speed consumes more power so to
achieve lower consumption default it to high speed only.
Add module params to override the default behavior as follows:
# echo Y|N > /sys/module/policy_engine/parameters/ss_dev
# echo Y|N > /sys/module/policy_engine/parameters/ss_host
Change-Id: I2a45a4149f593a129b4dd123df730405169404f9
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/pd/policy_engine.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/pd/policy_engine.c b/drivers/usb/pd/policy_engine.c index 1bb7082be8e6..0b02cc8fcd87 100644 --- a/drivers/usb/pd/policy_engine.c +++ b/drivers/usb/pd/policy_engine.c @@ -242,6 +242,12 @@ static void *usbpd_ipc_log; static int min_sink_current = 900; module_param(min_sink_current, int, S_IRUSR | S_IWUSR); +static bool ss_host; +module_param(ss_host, bool, S_IRUSR | S_IWUSR); + +static bool ss_dev = true; +module_param(ss_dev, bool, S_IRUSR | S_IWUSR); + static const u32 default_src_caps[] = { 0x36019096 }; /* VSafe5V @ 1.5A */ static const u32 default_snk_caps[] = { 0x2601905A, /* 5V @ 900mA */ @@ -318,6 +324,7 @@ static const unsigned int usbpd_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, EXTCON_USB_CC, + EXTCON_USB_SPEED, EXTCON_NONE, }; @@ -685,6 +692,10 @@ static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state) SVDM_CMD_TYPE_INITIATOR, 0, NULL, 0); + extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, + is_cable_flipped(pd)); + extcon_set_cable_state_(pd->extcon, EXTCON_USB_SPEED, + ss_host); extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 1); } @@ -755,6 +766,8 @@ static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state) EXTCON_USB_CC, is_cable_flipped(pd)); extcon_set_cable_state_(pd->extcon, + EXTCON_USB_SPEED, ss_dev); + extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1); } } @@ -852,6 +865,8 @@ static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state) pd->current_dr = DR_UFP; extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, is_cable_flipped(pd)); + extcon_set_cable_state_(pd->extcon, EXTCON_USB_SPEED, + ss_dev); extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1); pd_phy_update_roles(pd->current_dr, pd->current_pr); } @@ -1193,12 +1208,14 @@ static void dr_swap(struct usbpd *pd) extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 0); extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, is_cable_flipped(pd)); + extcon_set_cable_state_(pd->extcon, EXTCON_USB_SPEED, ss_dev); extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1); pd->current_dr = DR_UFP; } else if (pd->current_dr == DR_UFP) { extcon_set_cable_state_(pd->extcon, EXTCON_USB, 0); extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, is_cable_flipped(pd)); + extcon_set_cable_state_(pd->extcon, EXTCON_USB_SPEED, ss_host); extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 1); pd->current_dr = DR_DFP; @@ -1344,6 +1361,8 @@ static void usbpd_sm(struct work_struct *w) extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, is_cable_flipped(pd)); extcon_set_cable_state_(pd->extcon, + EXTCON_USB_SPEED, ss_host); + extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 1); } else if (pd->caps_count >= PD_CAPS_COUNT) { usbpd_dbg(&pd->dev, "Src CapsCounter exceeded, disabling PD\n"); |