Re: 2.6.36/2.6.37: broken compatibility with userspace input-utils?

From: Mark Lord
Date: Wed Jan 26 2011 - 14:30:26 EST

On 11-01-26 12:59 PM, Dmitry Torokhov wrote:
> On Wed, Jan 26, 2011 at 03:41:01PM -0200, Mauro Carvalho Chehab wrote:
>> Em 26-01-2011 12:58, Mark Lord escreveu:
>>> On 11-01-26 06:26 AM, Mauro Carvalho Chehab wrote:
>>> ..
>>>> However, as said previously in this thread, input-kbd won't work with any
>>>> RC table that uses NEC extended (and there are several devices on the
>>>> current Kernels with those tables), since it only reads up to 16 bits.
>>>> ir-keytable works with all RC tables, if you use a kernel equal or upper to
>>>> 2.6.36, due to the usage of the new ioctl's.
>>> Is there a way to control the key repeat rate for a device
>>> controlled by ir-kbd-i2c ?
>>> It appears to be limited to a max of between 4 and 5 repeats/sec somewhere,
>>> and I'd like to fix that.
>> It depends on what device do you have. Several I2C chips have the repeat
>> logic inside the I2C microcontroller PROM firmware. or at the remote
>> controller itself. So, there's nothing we can do to change it.
>> I have even one device here (I think it is a saa7134-based Kworld device)
>> that doesn't send any repeat event at all for most keys (I think it only
>> sends repeat events for volume - Can't remember the specific details anymore -
>> too many devices!).
>> The devices that produce repeat events can be adjusted via the normal
>> input layer tools like kbdrate.
> Unfortunately kbdrate affects all connected devices and I am not sure if
> there is a utility allowing to set rate on individual devices. But here
> is the main part:
> static int input_set_rate(int fd,
> unsigned int delay, unsigned int period)
> {
> unsigned int rep[2] = { delay, period };
> if (ioctl(fd, EVIOCSREP, rep) < 0) {
> perror("evdev ioctl");
> return -1;
> }
> return 0;
> }

Okay, if that's still a global in this day and age,
then I suppose I'll just have to special-case it here in my copy.

The hardware itself is capable of much faster repeat rates,
and prior to 2.6.36 I used to patch it for intelligent ramp-up
on repeats inside ir-kbd-i2c.

As of 2.6.36 that stopped working, and is now limited somewhere
to no more than one repeat every 210msecs.

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