Re: [alsa-devel] [PATCH] ASoC: fsl-ssi: fix SDMA starvation

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Markus Pargmann wrote:
>Can you change the code so that the interrupts are enabled only on
>i.MX?  On PowerPC, the interrupts are used only for debugging.

Why is this necessary? The interrupts were enabled for all
architectures before.

My concern is with these lines:

	write_ssi_mask(&ssi->sier, 0, CCSR_SSI_SIER_TDMAE);
...
	write_ssi_mask(&ssi->sier, CCSR_SSI_SIER_TDMAE, 0);

This toggles the TDMAE interrupt on PowerPC, which I believe is VITAL to making it work. The SSI and the DMA controller talk to each other automatically, and if I'm reading the documentation correctly, that communication depends on TDMAE and RDMAE.
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]