Messages in this thread | | | Date | Mon, 26 Sep 2022 15:42:30 +0200 | From | Vincent Whitchurch <> | Subject | Re: [PATCH 4/4] spi: s3c64xx: Fix large transfers with DMA |
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On Mon, Sep 19, 2022 at 03:38:29PM +0100, Mark Brown wrote: > On Fri, Sep 16, 2022 at 01:39:51PM +0200, Vincent Whitchurch wrote: > > The COUNT_VALUE in the PACKET_CNT register is 16-bit so the maximum > > value is 65535. Asking the driver to transfer a larger size currently > > leads to the DMA transfer timing out. Fix this by splitting the > > transfer as needed. > > The driver should just set max_transfer_size and let the core > handle this.
Hmm, AFAICS, the core doesn't actually do anything with max_transfer_size? It's only used from spi-mem and a handful of other clients via spi_max_transfer_size().
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