Re: [PATCH] spi: dw-dma: Fix Tx DMA channel working too fast

2020-07-21 Thread Mark Brown
On Tue, 21 Jul 2020 23:39:51 +0300, Serge Semin wrote: > It turns out having a Rx DMA channel serviced with higher priority than > a Tx DMA channel is not enough to provide a well balanced DMA-based SPI > transfer interface. There might still be moments when the Tx DMA channel > is occasionally han

Re: [PATCH] spi: dw-dma: Fix Tx DMA channel working too fast

2020-07-21 Thread Andy Shevchenko
On Tue, Jul 21, 2020 at 11:39 PM Serge Semin wrote: > > It turns out having a Rx DMA channel serviced with higher priority than > a Tx DMA channel is not enough to provide a well balanced DMA-based SPI > transfer interface. There might still be moments when the Tx DMA channel > is occasionally han

[PATCH] spi: dw-dma: Fix Tx DMA channel working too fast

2020-07-21 Thread Serge Semin
It turns out having a Rx DMA channel serviced with higher priority than a Tx DMA channel is not enough to provide a well balanced DMA-based SPI transfer interface. There might still be moments when the Tx DMA channel is occasionally handled faster than the Rx DMA channel. That in its turn will even