Messages in this thread | | | Date | Wed, 12 Apr 2023 20:58:32 +0530 | Subject | Re: [PATCH 0/2] spi: Add DMA mode support to spi-qcom-qspi | From | Vijaya Krishna Nivarthi <> |
| |
Thank you for the review...
On 4/5/2023 2:00 AM, Stephen Boyd wrote: > Quoting Vijaya Krishna Nivarthi (2023-04-04 11:03:18) >> There are large number of QSPI irqs that fire during boot/init and later >> on every suspend/resume. >> This could be made faster by doing DMA instead of PIO. >> Below is comparison for number of interrupts raised in 2 acenarios... >> Boot up and stabilise >> Suspend/Resume >> >> Sequence PIO DMA >> ======================= >> Boot-up 69088 19284 >> S/R 5066 3430 >> > The interrupts are less, yes, but does it save time or power?
We have not made measurements but the change is expected to improve performance.
Testing revealed no regressions.
| |