On 16/08/13 12:40, Sean Young wrote:
> On Fri, Aug 16, 2013 at 11:53:48AM +0100, Srinivas KANDAGATLA wrote:
>> Thanks Sean for the comments.
>> On 16/08/13 09:38, Sean Young wrote:
>>> On Wed, Aug 14, 2013 at 06:27:01PM +0100, Srinivas KANDAGATLA wrote:
>> [...]
>>>> + /* discard the entire collection in case of errors! */
>>>> + dev_info(dev->dev, "IR RX overrun\n");
>>>> + writel(IRB_RX_OVERRUN_INT,
>>>> + dev->rx_base + IRB_RX_INT_CLEAR);
>>>> + continue;
>>>> + }
>>>> +
>>>> + symbol = readl(dev->rx_base + IRB_RX_SYS);
>>>> + mark = readl(dev->rx_base + IRB_RX_ON);
>>>> +
>>>> + if (symbol == IRB_TIMEOUT)
>>>> + last_symbol = 1;
>>>> +
>>>> + /* Ignore any noise */
>>>> + if ((mark > 2) && (symbol > 1)) {
>>>> + symbol -= mark;
>>>> + if (dev->overclocking) { /* adjustments to timings */
>>>> + symbol *= dev->sample_mult;
>>>> + symbol /= dev->sample_div;
>>>> + mark *= dev->sample_mult;
>>>> + mark /= dev->sample_div;
>>>> + }
>>>> +
>>>> + ev.duration = US_TO_NS(mark);
>>>> + ev.pulse = true;
>>>> + ir_raw_event_store(dev->rdev, &ev);
>>>> +
>>>> + if (!last_symbol) {
>>>> + ev.duration = US_TO_NS(symbol);
>>>> + ev.pulse = false;
>>>> + ir_raw_event_store(dev->rdev, &ev);
>>>
>>> Make sure you call ir_raw_event_handle() once a while (maybe every time
>>> the interrupt handler is called?) to prevent the ir kfifo from
>>> overflowing in case of very long IR. ir_raw_event_store() just adds
>>> new edges to the kfifo() but does not flush them to the decoders or
>>> lirc.
>> I agree, but Am not sure it will really help in this case because, we
>> are going to stay in this interrupt handler till we get a
>> last_symbol(full key press/release event).. So calling
>> ir_raw_event_store mulitple times might not help because the
>> ir_raw_event kthread(which is clearing kfifo) which is only scheduled
>> after returning from this interrupt.
>
> If I read it correctly, then this is only true if the fifo contains an
> IRB_TIMEOUT symbol. If not yet, then the interrupt handlers is not
> waiting around for those symbols to arrive.
Yes, as we are clearing the fifo and fifo size is 64 words its always
highly possible that It will contain IRB_TIMEOUT for that interrupt.
Thanks,
srini
>
> Thanks
> Sean
>
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