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Re: [PATCH V17 3/6] i2c: tegra: fix maximum transfer size




08.02.2019 21:17, Sowjanya Komatineni пишет:
> 
>>>  static const struct i2c_adapter_quirks tegra194_i2c_quirks = {
>>>  	.flags = I2C_AQ_NO_ZERO_LEN,
>>> +	.max_write_len = 65535 - I2C_PACKET_HEADER_SIZE,
>>
>> Ideally it should be SZ_64K - I2C_PACKET_HEADER_SIZE to not miss the one byte, otherwise good to me:
>>
>> Reviewed-by: Dmitry Osipenko <digetx@xxxxxxxxx>
> 
> With SZ_64K - I2C_PACKET_HEADR_Size, When we compute dma_buf_size = max_write_len + I2C_PACKET_HEADER_SIZE, dma_buf_size will be SZ_64K which is 0x10000 apbdma dma count limit should be < 64K meaning 65535 max is allowed
> 

But it's for the GPCDMA, does it have the same 64K limit as APB DMA?