evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

usb: pd: Add support to set the maximum speed via extcon

Browse source 
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>
This commit is contained in:
Hemant Kumar 2016-05-19 14:32:35 -07:00 • committed by Jack Pham
parent a5b4466d33
commit 85cc38fca2
1 changed files with 19 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
drivers/usb/pd/policy_engine.c
View file

@ -242,6 +242,12 @@ static void *usbpd_ipc_log;
static int min_sink_current = 900; static int min_sink_current = 900;
module_param(min_sink_current, int, S_IRUSR | S_IWUSR); 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_src_caps[] = { 0x36019096 }; /* VSafe5V @ 1.5A */
static const u32 default_snk_caps[] = { 0x2601905A, /* 5V @ 900mA */ static const u32 default_snk_caps[] = { 0x2601905A, /* 5V @ 900mA */
@ -318,6 +324,7 @@ static const unsigned int usbpd_extcon_cable[] = {
EXTCON_USB, EXTCON_USB,
EXTCON_USB_HOST, EXTCON_USB_HOST,
EXTCON_USB_CC, EXTCON_USB_CC,
EXTCON_USB_SPEED,
EXTCON_NONE, EXTCON_NONE,
}; };
@ -685,6 +692,10 @@ static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state)
SVDM_CMD_TYPE_INITIATOR, 0, SVDM_CMD_TYPE_INITIATOR, 0,
NULL, 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); extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 1);
} }
@ -754,6 +765,8 @@ static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state)
extcon_set_cable_state_(pd->extcon, extcon_set_cable_state_(pd->extcon,
EXTCON_USB_CC, EXTCON_USB_CC,
is_cable_flipped(pd)); is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon,
EXTCON_USB_SPEED, ss_dev);
extcon_set_cable_state_(pd->extcon, extcon_set_cable_state_(pd->extcon,
EXTCON_USB, 1); 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; pd->current_dr = DR_UFP;
extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC,
is_cable_flipped(pd)); is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon, EXTCON_USB_SPEED,
ss_dev);
extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1); extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1);
pd_phy_update_roles(pd->current_dr, pd->current_pr); 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_HOST, 0);
extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC,
is_cable_flipped(pd)); is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon, EXTCON_USB_SPEED, ss_dev);
extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1); extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1);
pd->current_dr = DR_UFP; pd->current_dr = DR_UFP;
} else if (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, 0);
extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC, extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC,
is_cable_flipped(pd)); 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); extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 1);
pd->current_dr = DR_DFP; pd->current_dr = DR_DFP;
@ -1343,6 +1360,8 @@ static void usbpd_sm(struct work_struct *w)
/* Likely not PD-capable, start host now */ /* Likely not PD-capable, start host now */
extcon_set_cable_state_(pd->extcon, extcon_set_cable_state_(pd->extcon,
EXTCON_USB_CC, is_cable_flipped(pd)); 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_set_cable_state_(pd->extcon,
EXTCON_USB_HOST, 1); EXTCON_USB_HOST, 1);
} else if (pd->caps_count >= PD_CAPS_COUNT) { } else if (pd->caps_count >= PD_CAPS_COUNT) {