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HID: Increase HID maximum report size to 16KB 

Currently the maximum HID report size which can be buffered by the kernel is
8KB. This is sufficient for the vast majority of HID devices on the market, as
most HID reports are fairly small.

However, some unusual devices such as the Elgate Stream Deck exist which use a
report size slightly over 8KB for the image data that is sent to the device.
Reports these large cannot be buffered by the regular HID subsystem currently,
thus the only way to use such device is to bypass the HID subsystem entirely.

This increases the maximum HID report size to 16KB, which should cover all
sanely designed HID devices.

Signed-off-by: Dean Camera <dean@fourwalledcubicle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
zero-sugar-mainline-defconfig
Dean Camera 2020-11-26 09:39:34 +11:00 committed by Jiri Kosina
parent 6b55427526
commit 6a0eaf5123
1 changed files with 1 additions and 1 deletions
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2
include/linux/hid.h
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@ -494,7 +494,7 @@ struct hid_report_enum {
};
#define HID_MIN_BUFFER_SIZE 64 /* make sure there is at least a packet size of space */
#define HID_MAX_BUFFER_SIZE 8192 /* 8kb */
#define HID_MAX_BUFFER_SIZE 16384 /* 16kb */
#define HID_CONTROL_FIFO_SIZE 256 /* to init devices with >100 reports */
#define HID_OUTPUT_FIFO_SIZE 64