Re: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-28 Thread Dmitry Osipenko
29.01.2019 5:02, Sowjanya Komatineni пишет: > > This patch adds DMA support for Tegra I2C. Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for transfer size of the max FIFO depth and DMA mode is used for transfer size higher than max FIFO depth to save CPU o

RE: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-28 Thread Sowjanya Komatineni
> > > This patch adds DMA support for Tegra I2C. > > > > > > Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for > > > transfer size of the max FIFO depth and DMA mode is used for > > > transfer size higher than max FIFO depth to save CPU overhead. > > > > > > PIO mode needs full

RE: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-28 Thread Sowjanya Komatineni
> > This patch adds DMA support for Tegra I2C. > > > > Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for > > transfer size of the max FIFO depth and DMA mode is used for transfer > > size higher than max FIFO depth to save CPU overhead. > > > > PIO mode needs full intervention o

Re: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-26 Thread Dmitry Osipenko
26.01.2019 6:57, Sowjanya Komatineni пишет: > This patch adds DMA support for Tegra I2C. > > Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for > transfer size of the max FIFO depth and DMA mode is used for > transfer size higher than max FIFO depth to save CPU overhead. > > PIO mode

Re: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-26 Thread Dmitry Osipenko
26.01.2019 6:57, Sowjanya Komatineni пишет: > This patch adds DMA support for Tegra I2C. > > Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for > transfer size of the max FIFO depth and DMA mode is used for > transfer size higher than max FIFO depth to save CPU overhead. > > PIO mode

Re: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-26 Thread Dmitry Osipenko
26.01.2019 20:11, Dmitry Osipenko пишет: > 26.01.2019 6:57, Sowjanya Komatineni пишет: >> This patch adds DMA support for Tegra I2C. >> >> Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for >> transfer size of the max FIFO depth and DMA mode is used for >> transfer size higher than max

Re: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-26 Thread Dmitry Osipenko
26.01.2019 6:57, Sowjanya Komatineni пишет: > This patch adds DMA support for Tegra I2C. > > Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for > transfer size of the max FIFO depth and DMA mode is used for > transfer size higher than max FIFO depth to save CPU overhead. > > PIO mode

Re: [PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-26 Thread Dmitry Osipenko
26.01.2019 6:57, Sowjanya Komatineni пишет: > This patch adds DMA support for Tegra I2C. > > Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for > transfer size of the max FIFO depth and DMA mode is used for > transfer size higher than max FIFO depth to save CPU overhead. > > PIO mode

[PATCH V3 3/3] i2c: tegra: Add DMA Support

2019-01-25 Thread Sowjanya Komatineni
This patch adds DMA support for Tegra I2C. Tegra I2C TX and RX FIFO depth is 8 words. PIO mode is used for transfer size of the max FIFO depth and DMA mode is used for transfer size higher than max FIFO depth to save CPU overhead. PIO mode needs full intervention of CPU to fill or empty FIFO's an