Hi,
Manu Abraham wrote:
Hartmut Hackmann wrote:
Hi,
Jimmy Hedman wrote:
Hi,
I have a Compro DVB-T 300 which uses the saa7134-dvb-driver. When it's
tuned it is flooding my system with between 12000 and 16000 interrupts a
second. It works, but that amout of interrupts doesn't sound healty. Any
ideas what this could be?
Many thanks in advance,
Jimmy Hedman
The streaming DMA causes loads of interrupts, but not that many.
Whether it be consistent or streaming, this has nothing to do with the
interrupt count. The only case when you have too many interrupts is when
your buffers are too small, causing the device requesting the host to
read from the DMA buffers.
For DVB-T you should expect about 70 per sec, and for analog, its
up to 50 per sec for 50Hz systems.
The only other valid interrupt source are the GPIOs (Remote control).
If there really are so many interrupts, there must be something wrong
with the GPIO config but i don't think so.
The buffer size for DVB is fixed, at 14MBit it gives the number of
buffer full IRQs i mentioned above (70 per sec). For analog, its easier.
The buffers always hold fields / frames. I forgot the sound DMA buffers,
which give about 32 IRQs per sec.
So the streaming causes about 150 IRQs per second if everything is
running.
Hartmut
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