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?
Re: [PATCH 0/2] spi: Add DMA mode support to spi-qcom-qspi
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- Subject: Re: [PATCH 0/2] spi: Add DMA mode support to spi-qcom-qspi
- From: Stephen Boyd <swboyd@xxxxxxxxxxxx>
- Date: Tue, 4 Apr 2023 13:30:28 -0700
- Cc: quic_msavaliy@xxxxxxxxxxx, dianders@xxxxxxxxxxxx, mka@xxxxxxxxxxxx, quic_vtanuku@xxxxxxxxxxx
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