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Date: Tue, 24 Nov 2015 15:11:19 +0100
From: Benjamin Tissoires <benjamin.tissoires@...il.com>
To: Adrien Vergé <adrienverge@...il.com>
Cc: Oliver Neukum <oneukum@...e.com>, Jiri Kosina <jikos@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Logan Gunthorpe <logang@...tatee.com>,
Hans de Goede <hdegoede@...hat.com>,
Vincent Palatin <vpalatin@...omium.org>,
Macpaul Lin <macpaul@...il.com>,
Adel Gadllah <adel.gadllah@...il.com>,
linux-input <linux-input@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] USB: quirks: Apply ALWAYS_POLL to all ELAN devices
Hi Adrien,
On Tue, Nov 24, 2015 at 2:49 PM, Adrien Vergé <adrienverge@...il.com> wrote:
> All ELAN hid devices seem to require the ALWAYS_POLL quirk. Let's use
> this quirk for all devices from this vendor, rather than maintaining a
> list of all its known product IDs.
>
> To achieve that, this patch introduces a new hid_vendor_blacklist[] that
> is checked when the product ID is not found in hid_product_blacklist[].
>
> Tested-by: Adrien Vergé <adrienverge@...il.com>
> Signed-off-by: Adrien Vergé <adrienverge@...il.com>
> ---
> drivers/hid/hid-ids.h | 5 -----
> drivers/hid/usbhid/hid-quirks.c | 43 +++++++++++++++++++++++++++--------------
> 2 files changed, 29 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
> index ac1feea..3c7e0c3 100644
> --- a/drivers/hid/hid-ids.h
> +++ b/drivers/hid/hid-ids.h
> @@ -316,11 +316,6 @@
> #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001 0xa001
>
> #define USB_VENDOR_ID_ELAN 0x04f3
> -#define USB_DEVICE_ID_ELAN_TOUCHSCREEN 0x0089
> -#define USB_DEVICE_ID_ELAN_TOUCHSCREEN_009B 0x009b
> -#define USB_DEVICE_ID_ELAN_TOUCHSCREEN_0103 0x0103
> -#define USB_DEVICE_ID_ELAN_TOUCHSCREEN_010c 0x010c
> -#define USB_DEVICE_ID_ELAN_TOUCHSCREEN_016F 0x016f
>
> #define USB_VENDOR_ID_ELECOM 0x056e
> #define USB_DEVICE_ID_ELECOM_BM084 0x0061
> diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
> index 94bb137..9550497 100644
> --- a/drivers/hid/usbhid/hid-quirks.c
> +++ b/drivers/hid/usbhid/hid-quirks.c
> @@ -21,15 +21,29 @@
>
> #include "../hid-ids.h"
>
> +struct hid_blacklist {
> + __u16 idVendor;
> + __u16 idProduct;
> + __u32 quirks;
> +};
> +
> +/*
> + * Alphabetically sorted blacklist for vendor-global quirks. If a device matches
> + * both this blacklist and the product one (below), the more specific one
> + * (product ID) prevails.
> + */
> +
> +static const struct hid_blacklist hid_vendor_blacklist[] = {
> + { USB_VENDOR_ID_ELAN, 0, HID_QUIRK_ALWAYS_POLL },
> +
> + { 0, 0, 0 }
> +};
Instead of adding a second table, I'd rather have a match on
HID_ANY_ID for the product ID.
> +
> /*
> * Alphabetically sorted blacklist by quirk type.
> */
>
> -static const struct hid_blacklist {
> - __u16 idVendor;
> - __u16 idProduct;
> - __u32 quirks;
> -} hid_blacklist[] = {
> +static const struct hid_blacklist hid_product_blacklist[] = {
> { USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_GAMEPAD, HID_QUIRK_BADPAD },
> { USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_PREDATOR, HID_QUIRK_BADPAD },
> { USB_VENDOR_ID_ALPS, USB_DEVICE_ID_IBM_GAMEPAD, HID_QUIRK_BADPAD },
> @@ -72,11 +86,6 @@ static const struct hid_blacklist {
> { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE, HID_QUIRK_ALWAYS_POLL },
> { USB_VENDOR_ID_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET },
> { USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_WIIU, HID_QUIRK_MULTI_INPUT },
> - { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN, HID_QUIRK_ALWAYS_POLL },
> - { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_009B, HID_QUIRK_ALWAYS_POLL },
> - { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_0103, HID_QUIRK_ALWAYS_POLL },
> - { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_010c, HID_QUIRK_ALWAYS_POLL },
> - { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN_016F, HID_QUIRK_ALWAYS_POLL },
This becomes:
{ USB_VENDOR_ID_ELAN, HID_ANY_ID, HID_QUIRK_ALWAYS_POLL },
> { USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET },
> { USB_VENDOR_ID_FORMOSA, USB_DEVICE_ID_FORMOSA_IR_RECEIVER, HID_QUIRK_NO_INIT_REPORTS },
> { USB_VENDOR_ID_FREESCALE, USB_DEVICE_ID_FREESCALE_MX28, HID_QUIRK_NOGET },
> @@ -337,10 +346,16 @@ static const struct hid_blacklist *usbhid_exists_squirk(const u16 idVendor,
> const struct hid_blacklist *bl_entry = NULL;
> int n = 0;
>
> - for (; hid_blacklist[n].idVendor; n++)
> - if (hid_blacklist[n].idVendor == idVendor &&
> - hid_blacklist[n].idProduct == idProduct)
And here you need to check also on the match with HID_ANY_ID for both
idVendor and idProduct.
Cheers,
Benjamin
> - bl_entry = &hid_blacklist[n];
> + for (; hid_product_blacklist[n].idVendor; n++)
> + if (hid_product_blacklist[n].idVendor == idVendor &&
> + hid_product_blacklist[n].idProduct == idProduct)
> + bl_entry = &hid_product_blacklist[n];
> +
> + if (bl_entry == NULL) {
> + for (n = 0; hid_vendor_blacklist[n].idVendor; n++)
> + if (hid_vendor_blacklist[n].idVendor == idVendor)
> + bl_entry = &hid_vendor_blacklist[n];
> + }
>
> if (bl_entry != NULL)
> dbg_hid("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
> --
> 2.4.3
>
> --
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