On Wed, Sep 19, 2018 at 11:47 AM Julian Sax <jsbc@xxxxxx> wrote: > > A particular touchpad (SIPODEV SP1064) refuses to supply the HID > descriptors. This patch provides the framework for overriding these > descriptors based on DMI data. It also includes the descriptors for > said touchpad, which were extracted by listening to the traffic of the > windows filter driver, as well as the DMI data for the laptops known > to use this device. > > Relevant Bug: https://bugzilla.redhat.com/show_bug.cgi?id=1526312 > > Cc: Hans de Goede <hdegoede@xxxxxxxxxx> > Reported-and-tested-by: ahormann@xxxxxxx > Reported-and-tested-by: Bruno Jesus <bruno.fl.jesus@xxxxxxxxx> > Reported-and-tested-by: Dietrich <enaut.w@xxxxxxxxxxxxxx> > Reported-and-tested-by: kloxdami@xxxxxxxxx > Signed-off-by: Julian Sax <jsbc@xxxxxx> > --- Looks good AFAICT: Reviewed-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx> Cheers, Benjamin > Changes in v4: > * added Mediacom Flexbook Edge 11 to the override list > > Changes in v3: > * added additional check for the ACPI ID of the device > * added Direkt-Tek DTLAPY116-2 to the override list > > Changes in v2: > * added documentation about the source of the descriptors > * added documentation inside the descriptors > > drivers/hid/i2c-hid/Makefile | 3 + > .../hid/i2c-hid/{i2c-hid.c => i2c-hid-core.c} | 60 ++- > drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c | 376 ++++++++++++++++++ > drivers/hid/i2c-hid/i2c-hid.h | 20 + > 4 files changed, 439 insertions(+), 20 deletions(-) > rename drivers/hid/i2c-hid/{i2c-hid.c => i2c-hid-core.c} (96%) > create mode 100644 drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c > create mode 100644 drivers/hid/i2c-hid/i2c-hid.h > > diff --git a/drivers/hid/i2c-hid/Makefile b/drivers/hid/i2c-hid/Makefile > index 832d8f9aaba..099e1ce2f23 100644 > --- a/drivers/hid/i2c-hid/Makefile > +++ b/drivers/hid/i2c-hid/Makefile > @@ -3,3 +3,6 @@ > # > > obj-$(CONFIG_I2C_HID) += i2c-hid.o > + > +i2c-hid-objs = i2c-hid-core.o > +i2c-hid-$(CONFIG_DMI) += i2c-hid-dmi-quirks.o > diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid-core.c > similarity index 96% > rename from drivers/hid/i2c-hid/i2c-hid.c > rename to drivers/hid/i2c-hid/i2c-hid-core.c > index f3076659361..823c63ad08b 100644 > --- a/drivers/hid/i2c-hid/i2c-hid.c > +++ b/drivers/hid/i2c-hid/i2c-hid-core.c > @@ -43,6 +43,7 @@ > #include <linux/platform_data/i2c-hid.h> > > #include "../hid-ids.h" > +#include "i2c-hid.h" > > /* quirks to control the device */ > #define I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV BIT(0) > @@ -669,6 +670,7 @@ static int i2c_hid_parse(struct hid_device *hid) > char *rdesc; > int ret; > int tries = 3; > + char *use_override; > > i2c_hid_dbg(ihid, "entering %s\n", __func__); > > @@ -687,26 +689,37 @@ static int i2c_hid_parse(struct hid_device *hid) > if (ret) > return ret; > > - rdesc = kzalloc(rsize, GFP_KERNEL); > + use_override = i2c_hid_get_dmi_hid_report_desc_override(client->name, > + &rsize); > > - if (!rdesc) { > - dbg_hid("couldn't allocate rdesc memory\n"); > - return -ENOMEM; > - } > - > - i2c_hid_dbg(ihid, "asking HID report descriptor\n"); > - > - ret = i2c_hid_command(client, &hid_report_descr_cmd, rdesc, rsize); > - if (ret) { > - hid_err(hid, "reading report descriptor failed\n"); > - kfree(rdesc); > - return -EIO; > + if (use_override) { > + rdesc = use_override; > + i2c_hid_dbg(ihid, "Using a HID report descriptor override\n"); > + } else { > + rdesc = kzalloc(rsize, GFP_KERNEL); > + > + if (!rdesc) { > + dbg_hid("couldn't allocate rdesc memory\n"); > + return -ENOMEM; > + } > + > + i2c_hid_dbg(ihid, "asking HID report descriptor\n"); > + > + ret = i2c_hid_command(client, &hid_report_descr_cmd, > + rdesc, rsize); > + if (ret) { > + hid_err(hid, "reading report descriptor failed\n"); > + kfree(rdesc); > + return -EIO; > + } > } > > i2c_hid_dbg(ihid, "Report Descriptor: %*ph\n", rsize, rdesc); > > ret = hid_parse_report(hid, rdesc, rsize); > - kfree(rdesc); > + if (!use_override) > + kfree(rdesc); > + > if (ret) { > dbg_hid("parsing report descriptor failed\n"); > return ret; > @@ -833,12 +846,19 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid) > int ret; > > /* i2c hid fetch using a fixed descriptor size (30 bytes) */ > - i2c_hid_dbg(ihid, "Fetching the HID descriptor\n"); > - ret = i2c_hid_command(client, &hid_descr_cmd, ihid->hdesc_buffer, > - sizeof(struct i2c_hid_desc)); > - if (ret) { > - dev_err(&client->dev, "hid_descr_cmd failed\n"); > - return -ENODEV; > + if (i2c_hid_get_dmi_i2c_hid_desc_override(client->name)) { > + i2c_hid_dbg(ihid, "Using a HID descriptor override\n"); > + ihid->hdesc = > + *i2c_hid_get_dmi_i2c_hid_desc_override(client->name); > + } else { > + i2c_hid_dbg(ihid, "Fetching the HID descriptor\n"); > + ret = i2c_hid_command(client, &hid_descr_cmd, > + ihid->hdesc_buffer, > + sizeof(struct i2c_hid_desc)); > + if (ret) { > + dev_err(&client->dev, "hid_descr_cmd failed\n"); > + return -ENODEV; > + } > } > > /* Validate the length of HID descriptor, the 4 first bytes: > diff --git a/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c > new file mode 100644 > index 00000000000..1d645c9ab41 > --- /dev/null > +++ b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c > @@ -0,0 +1,376 @@ > +// SPDX-License-Identifier: GPL-2.0+ > + > +/* > + * Quirks for I2C-HID devices that do not supply proper descriptors > + * > + * Copyright (c) 2018 Julian Sax <jsbc@xxxxxx> > + * > + */ > + > +#include <linux/types.h> > +#include <linux/dmi.h> > +#include <linux/mod_devicetable.h> > + > +#include "i2c-hid.h" > + > + > +struct i2c_hid_desc_override { > + union { > + struct i2c_hid_desc *i2c_hid_desc; > + uint8_t *i2c_hid_desc_buffer; > + }; > + uint8_t *hid_report_desc; > + unsigned int hid_report_desc_size; > + uint8_t *i2c_name; > +}; > + > + > +/* > + * descriptors for the SIPODEV SP1064 touchpad > + * > + * This device does not supply any descriptors and on windows a filter > + * driver operates between the i2c-hid layer and the device and injects > + * these descriptors when the device is prompted. The descriptors were > + * extracted by listening to the i2c-hid traffic that occurs between the > + * windows filter driver and the windows i2c-hid driver. > + */ > + > +static const struct i2c_hid_desc_override sipodev_desc = { > + .i2c_hid_desc_buffer = (uint8_t []) > + {0x1e, 0x00, /* Length of descriptor */ > + 0x00, 0x01, /* Version of descriptor */ > + 0xdb, 0x01, /* Length of report descriptor */ > + 0x21, 0x00, /* Location of report descriptor */ > + 0x24, 0x00, /* Location of input report */ > + 0x1b, 0x00, /* Max input report length */ > + 0x25, 0x00, /* Location of output report */ > + 0x11, 0x00, /* Max output report length */ > + 0x22, 0x00, /* Location of command register */ > + 0x23, 0x00, /* Location of data register */ > + 0x11, 0x09, /* Vendor ID */ > + 0x88, 0x52, /* Product ID */ > + 0x06, 0x00, /* Version ID */ > + 0x00, 0x00, 0x00, 0x00 /* Reserved */ > + }, > + > + .hid_report_desc = (uint8_t []) > + {0x05, 0x01, /* Usage Page (Desktop), */ > + 0x09, 0x02, /* Usage (Mouse), */ > + 0xA1, 0x01, /* Collection (Application), */ > + 0x85, 0x01, /* Report ID (1), */ > + 0x09, 0x01, /* Usage (Pointer), */ > + 0xA1, 0x00, /* Collection (Physical), */ > + 0x05, 0x09, /* Usage Page (Button), */ > + 0x19, 0x01, /* Usage Minimum (01h), */ > + 0x29, 0x02, /* Usage Maximum (02h), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x95, 0x06, /* Report Count (6), */ > + 0x81, 0x01, /* Input (Constant), */ > + 0x05, 0x01, /* Usage Page (Desktop), */ > + 0x09, 0x30, /* Usage (X), */ > + 0x09, 0x31, /* Usage (Y), */ > + 0x15, 0x81, /* Logical Minimum (-127), */ > + 0x25, 0x7F, /* Logical Maximum (127), */ > + 0x75, 0x08, /* Report Size (8), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x81, 0x06, /* Input (Variable, Relative), */ > + 0xC0, /* End Collection, */ > + 0xC0, /* End Collection, */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x09, 0x05, /* Usage (Touchpad), */ > + 0xA1, 0x01, /* Collection (Application), */ > + 0x85, 0x04, /* Report ID (4), */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x09, 0x22, /* Usage (Finger), */ > + 0xA1, 0x02, /* Collection (Logical), */ > + 0x15, 0x00, /* Logical Minimum (0), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0x09, 0x47, /* Usage (Touch Valid), */ > + 0x09, 0x42, /* Usage (Tip Switch), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x75, 0x03, /* Report Size (3), */ > + 0x25, 0x05, /* Logical Maximum (5), */ > + 0x09, 0x51, /* Usage (Contact Identifier), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x03, /* Report Count (3), */ > + 0x81, 0x03, /* Input (Constant, Variable), */ > + 0x05, 0x01, /* Usage Page (Desktop), */ > + 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */ > + 0x75, 0x10, /* Report Size (16), */ > + 0x55, 0x0E, /* Unit Exponent (14), */ > + 0x65, 0x11, /* Unit (Centimeter), */ > + 0x09, 0x30, /* Usage (X), */ > + 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x46, 0xBC, 0x02, /* Physical Maximum (700), */ > + 0x26, 0x34, 0x05, /* Logical Maximum (1332), */ > + 0x09, 0x31, /* Usage (Y), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0xC0, /* End Collection, */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x09, 0x22, /* Usage (Finger), */ > + 0xA1, 0x02, /* Collection (Logical), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0x09, 0x47, /* Usage (Touch Valid), */ > + 0x09, 0x42, /* Usage (Tip Switch), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x75, 0x03, /* Report Size (3), */ > + 0x25, 0x05, /* Logical Maximum (5), */ > + 0x09, 0x51, /* Usage (Contact Identifier), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x03, /* Report Count (3), */ > + 0x81, 0x03, /* Input (Constant, Variable), */ > + 0x05, 0x01, /* Usage Page (Desktop), */ > + 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */ > + 0x75, 0x10, /* Report Size (16), */ > + 0x09, 0x30, /* Usage (X), */ > + 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x46, 0xBC, 0x02, /* Physical Maximum (700), */ > + 0x26, 0x34, 0x05, /* Logical Maximum (1332), */ > + 0x09, 0x31, /* Usage (Y), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0xC0, /* End Collection, */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x09, 0x22, /* Usage (Finger), */ > + 0xA1, 0x02, /* Collection (Logical), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0x09, 0x47, /* Usage (Touch Valid), */ > + 0x09, 0x42, /* Usage (Tip Switch), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x75, 0x03, /* Report Size (3), */ > + 0x25, 0x05, /* Logical Maximum (5), */ > + 0x09, 0x51, /* Usage (Contact Identifier), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x03, /* Report Count (3), */ > + 0x81, 0x03, /* Input (Constant, Variable), */ > + 0x05, 0x01, /* Usage Page (Desktop), */ > + 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */ > + 0x75, 0x10, /* Report Size (16), */ > + 0x09, 0x30, /* Usage (X), */ > + 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x46, 0xBC, 0x02, /* Physical Maximum (700), */ > + 0x26, 0x34, 0x05, /* Logical Maximum (1332), */ > + 0x09, 0x31, /* Usage (Y), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0xC0, /* End Collection, */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x09, 0x22, /* Usage (Finger), */ > + 0xA1, 0x02, /* Collection (Logical), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0x09, 0x47, /* Usage (Touch Valid), */ > + 0x09, 0x42, /* Usage (Tip Switch), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x75, 0x03, /* Report Size (3), */ > + 0x25, 0x05, /* Logical Maximum (5), */ > + 0x09, 0x51, /* Usage (Contact Identifier), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x03, /* Report Count (3), */ > + 0x81, 0x03, /* Input (Constant, Variable), */ > + 0x05, 0x01, /* Usage Page (Desktop), */ > + 0x26, 0x44, 0x0A, /* Logical Maximum (2628), */ > + 0x75, 0x10, /* Report Size (16), */ > + 0x09, 0x30, /* Usage (X), */ > + 0x46, 0x1A, 0x04, /* Physical Maximum (1050), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x46, 0xBC, 0x02, /* Physical Maximum (700), */ > + 0x26, 0x34, 0x05, /* Logical Maximum (1332), */ > + 0x09, 0x31, /* Usage (Y), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0xC0, /* End Collection, */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x55, 0x0C, /* Unit Exponent (12), */ > + 0x66, 0x01, 0x10, /* Unit (Seconds), */ > + 0x47, 0xFF, 0xFF, 0x00, 0x00,/* Physical Maximum (65535), */ > + 0x27, 0xFF, 0xFF, 0x00, 0x00,/* Logical Maximum (65535), */ > + 0x75, 0x10, /* Report Size (16), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x09, 0x56, /* Usage (Scan Time), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x09, 0x54, /* Usage (Contact Count), */ > + 0x25, 0x7F, /* Logical Maximum (127), */ > + 0x75, 0x08, /* Report Size (8), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x05, 0x09, /* Usage Page (Button), */ > + 0x09, 0x01, /* Usage (01h), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x81, 0x02, /* Input (Variable), */ > + 0x95, 0x07, /* Report Count (7), */ > + 0x81, 0x03, /* Input (Constant, Variable), */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x85, 0x02, /* Report ID (2), */ > + 0x09, 0x55, /* Usage (Contact Count Maximum), */ > + 0x09, 0x59, /* Usage (59h), */ > + 0x75, 0x04, /* Report Size (4), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x25, 0x0F, /* Logical Maximum (15), */ > + 0xB1, 0x02, /* Feature (Variable), */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x85, 0x07, /* Report ID (7), */ > + 0x09, 0x60, /* Usage (60h), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0xB1, 0x02, /* Feature (Variable), */ > + 0x95, 0x07, /* Report Count (7), */ > + 0xB1, 0x03, /* Feature (Constant, Variable), */ > + 0x85, 0x06, /* Report ID (6), */ > + 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */ > + 0x09, 0xC5, /* Usage (C5h), */ > + 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ > + 0x75, 0x08, /* Report Size (8), */ > + 0x96, 0x00, 0x01, /* Report Count (256), */ > + 0xB1, 0x02, /* Feature (Variable), */ > + 0xC0, /* End Collection, */ > + 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */ > + 0x09, 0x01, /* Usage (01h), */ > + 0xA1, 0x01, /* Collection (Application), */ > + 0x85, 0x0D, /* Report ID (13), */ > + 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ > + 0x19, 0x01, /* Usage Minimum (01h), */ > + 0x29, 0x02, /* Usage Maximum (02h), */ > + 0x75, 0x08, /* Report Size (8), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0xB1, 0x02, /* Feature (Variable), */ > + 0xC0, /* End Collection, */ > + 0x05, 0x0D, /* Usage Page (Digitizer), */ > + 0x09, 0x0E, /* Usage (Configuration), */ > + 0xA1, 0x01, /* Collection (Application), */ > + 0x85, 0x03, /* Report ID (3), */ > + 0x09, 0x22, /* Usage (Finger), */ > + 0xA1, 0x02, /* Collection (Logical), */ > + 0x09, 0x52, /* Usage (Device Mode), */ > + 0x25, 0x0A, /* Logical Maximum (10), */ > + 0x95, 0x01, /* Report Count (1), */ > + 0xB1, 0x02, /* Feature (Variable), */ > + 0xC0, /* End Collection, */ > + 0x09, 0x22, /* Usage (Finger), */ > + 0xA1, 0x00, /* Collection (Physical), */ > + 0x85, 0x05, /* Report ID (5), */ > + 0x09, 0x57, /* Usage (57h), */ > + 0x09, 0x58, /* Usage (58h), */ > + 0x75, 0x01, /* Report Size (1), */ > + 0x95, 0x02, /* Report Count (2), */ > + 0x25, 0x01, /* Logical Maximum (1), */ > + 0xB1, 0x02, /* Feature (Variable), */ > + 0x95, 0x06, /* Report Count (6), */ > + 0xB1, 0x03, /* Feature (Constant, Variable),*/ > + 0xC0, /* End Collection, */ > + 0xC0 /* End Collection */ > + }, > + .hid_report_desc_size = 475, > + .i2c_name = "SYNA3602:00" > +}; > + > + > +static const struct dmi_system_id i2c_hid_dmi_desc_override_table[] = { > + { > + .ident = "Teclast F6 Pro", > + .matches = { > + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TECLAST"), > + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "F6 Pro"), > + }, > + .driver_data = (void *)&sipodev_desc > + }, > + { > + .ident = "Teclast F7", > + .matches = { > + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TECLAST"), > + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "F7"), > + }, > + .driver_data = (void *)&sipodev_desc > + }, > + { > + .ident = "Trekstor Primebook C13", > + .matches = { > + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TREKSTOR"), > + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Primebook C13"), > + }, > + .driver_data = (void *)&sipodev_desc > + }, > + { > + .ident = "Trekstor Primebook C11", > + .matches = { > + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TREKSTOR"), > + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Primebook C11"), > + }, > + .driver_data = (void *)&sipodev_desc > + }, > + { > + .ident = "Direkt-Tek DTLAPY116-2", > + .matches = { > + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Direkt-Tek"), > + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "DTLAPY116-2"), > + }, > + .driver_data = (void *)&sipodev_desc > + }, > + { > + .ident = "Mediacom Flexbook Edge 11", > + .matches = { > + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "MEDIACOM"), > + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "FlexBook edge11 - M-FBE11"), > + }, > + .driver_data = (void *)&sipodev_desc > + } > +}; > + > + > +struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name) > +{ > + struct i2c_hid_desc_override *override; > + const struct dmi_system_id *system_id; > + > + system_id = dmi_first_match(i2c_hid_dmi_desc_override_table); > + if (!system_id) > + return NULL; > + > + override = system_id->driver_data; > + if (strcmp(override->i2c_name, i2c_name)) > + return NULL; > + > + return override->i2c_hid_desc; > +} > + > +char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name, > + unsigned int *size) > +{ > + struct i2c_hid_desc_override *override; > + const struct dmi_system_id *system_id; > + > + system_id = dmi_first_match(i2c_hid_dmi_desc_override_table); > + if (!system_id) > + return NULL; > + > + override = system_id->driver_data; > + if (strcmp(override->i2c_name, i2c_name)) > + return NULL; > + > + *size = override->hid_report_desc_size; > + return override->hid_report_desc; > +} > diff --git a/drivers/hid/i2c-hid/i2c-hid.h b/drivers/hid/i2c-hid/i2c-hid.h > new file mode 100644 > index 00000000000..a8c19aef582 > --- /dev/null > +++ b/drivers/hid/i2c-hid/i2c-hid.h > @@ -0,0 +1,20 @@ > +/* SPDX-License-Identifier: GPL-2.0+ */ > + > +#ifndef I2C_HID_H > +#define I2C_HID_H > + > + > +#ifdef CONFIG_DMI > +struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name); > +char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name, > + unsigned int *size); > +#else > +static inline struct i2c_hid_desc > + *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name) > +{ return NULL; } > +static inline char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name, > + unsigned int *size) > +{ return NULL; } > +#endif > + > +#endif > -- > 2.18.0 >
