xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: common: Parse for USB SSP genXxY

Browse Source 
[ Upstream commit 52c2d15703c3a900d5f78cd599b823db40d5100b ]

The USB "maximum-speed" property can now take the SSP signaling rate
generation and lane count with these new strings:

"super-speed-plus-gen2x2"
"super-speed-plus-gen2x1"
"super-speed-plus-gen1x2"

Introduce usb_get_maximum_ssp_rate() to parse for the corresponding
usb_ssp_rate enum. The original usb_get_maximum_speed() will return
USB_SPEED_SUPER_PLUS if it matches one of these new strings.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/f8ed896313d8cd8e2d2b540fc82db92b3ddf8a47.1611106162.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: b6155eaf6b05 ("usb: common: debug: Check non-standard control requests")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thinh Nguyen
2021-01-19 17:36:14 -08:00
committed by Greg Kroah-Hartman
parent ffffb159e1
commit c1ef8c66a3
2 changed files with 36 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
include/linux/usb/ch9.h
View File

@@ -71,6 +71,17 @@ extern const char *usb_speed_string(enum usb_device_speed speed);
*/
extern enum usb_device_speed usb_get_maximum_speed(struct device *dev);
/**
* usb_get_maximum_ssp_rate - Get the signaling rate generation and lane count
* of a SuperSpeed Plus capable device.
* @dev: Pointer to the given USB controller device
*
* If the string from "maximum-speed" property is super-speed-plus-genXxY where
* 'X' is the generation number and 'Y' is the number of lanes, then this
* function returns the corresponding enum usb_ssp_rate.
*/
extern enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev);
/**
* usb_state_string - Returns human readable name for the state.
* @state: The state to return a human-readable name for. If it's not