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SubjectRe: [PATCH RESEND] Input: xpad - fix PowerA init quirk for some gamepad models
On Tue, Aug 08, 2017 at 05:01:35PM -0700, Cameron Gutman wrote:
> The PowerA gamepad initialization quirk worked with the PowerA
> wired gamepad I had around (0x24c6:0x543a), but a user reported [0]
> that it didn't work for him, even though our gamepads shared the
> same vendor and product IDs.
>
> When I initially implemented the PowerA quirk, I wanted to avoid
> actually triggering the rumble action during init. My tests showed
> that my gamepad would work correctly even if it received a rumble
> of 0 intensity, so that's what I went with.
>
> Unfortunately, this apparently isn't true for all models (perhaps
> a firmware difference?). This non-working gamepad seems to require
> the real magic rumble packet that the Microsoft driver sends, which
> actually vibrates the gamepad. To counteract this effect, I still
> send the old zero-rumble PowerA quirk packet which cancels the
> rumble effect before the motors can spin up enough to vibrate.
>
> [0]: https://github.com/paroj/xpad/issues/48#issuecomment-313904867
>
> Reported-by: Kyle Beauchamp <kyleabeauchamp@gmail.com>
> Tested-by: Kyle Beauchamp <kyleabeauchamp@gmail.com>
> Fixes: 81093c9848a7 ("Input: xpad - support some quirky Xbox One pads")
> Cc: stable@vger.kernel.org # v4.12
> Signed-off-by: Cameron Gutman <aicommander@gmail.com>
> ---
> Forgot to CC LKML last time, resending to hit the testbots (and people)
> there.

Applied, thank you.

>
> ---
> drivers/input/joystick/xpad.c | 24 +++++++++++++++++++-----
> 1 file changed, 19 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
> index 298a6ba51411..ca0e19ae7a90 100644
> --- a/drivers/input/joystick/xpad.c
> +++ b/drivers/input/joystick/xpad.c
> @@ -476,10 +476,21 @@ static const u8 xboxone_hori_init[] = {
> };
>
> /*
> - * A rumble packet is required for some PowerA pads to start
> + * A specific rumble packet is required for some PowerA pads to start
> * sending input reports. One of those pads is (0x24c6:0x543a).
> */
> -static const u8 xboxone_zerorumble_init[] = {
> +static const u8 xboxone_rumblebegin_init[] = {
> + 0x09, 0x00, 0x00, 0x09, 0x00, 0x0F, 0x00, 0x00,
> + 0x1D, 0x1D, 0xFF, 0x00, 0x00
> +};
> +
> +/*
> + * A rumble packet with zero FF intensity will immediately
> + * terminate the rumbling required to init PowerA pads.
> + * This should happen fast enough that the motors don't
> + * spin up to enough speed to actually vibrate the gamepad.
> + */
> +static const u8 xboxone_rumbleend_init[] = {
> 0x09, 0x00, 0x00, 0x09, 0x00, 0x0F, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x00
> };
> @@ -494,9 +505,12 @@ static const struct xboxone_init_packet xboxone_init_packets[] = {
> XBOXONE_INIT_PKT(0x0e6f, 0x0165, xboxone_hori_init),
> XBOXONE_INIT_PKT(0x0f0d, 0x0067, xboxone_hori_init),
> XBOXONE_INIT_PKT(0x0000, 0x0000, xboxone_fw2015_init),
> - XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_zerorumble_init),
> - XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_zerorumble_init),
> - XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_zerorumble_init),
> + XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_rumblebegin_init),
> + XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_rumblebegin_init),
> + XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_rumblebegin_init),
> + XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_rumbleend_init),
> + XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_rumbleend_init),
> + XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_rumbleend_init),
> };
>
> struct xpad_output_packet {
> --
> 2.13.4
>

--
Dmitry

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