On Fri, Aug 06 2021, Viresh Kumar <> wrote:
> On 23-07-21, 10:56, Viresh Kumar wrote:
>> The I2C protocol allows requests with no data, like the SMBus Quick
>> command, where the command is inferred based on the read/write flag
>> itself.
>>
>> In order to allow such a request, allocate another bit,
>> VIRTIO_I2C_FLAGS_M_RD(1), in the flags to pass the request type, as read
>> or write. This was earlier done using the read/write permission to the
>> buffer itself.
>>
>> This still won't work well if multiple buffers are passed for the same
>> request, i.e. the write-read requests, as the VIRTIO_I2C_FLAGS_M_RD flag
>> can only be used with a single buffer.
>>
>> Coming back to it, there is no need to send multiple buffers with a
>> single request. All we need, is a way to group several requests
>> together, which we can already do based on the
>> VIRTIO_I2C_FLAGS_FAIL_NEXT flag.
>>
>> Remove support for multiple buffers within a single request.
>>
>> Since we are at very early stage of development currently, we can do
>> these modifications without addition of new features or versioning of
>> the protocol.
>>
>> Signed-off-by: Viresh Kumar <>
>> ---
>
> Gentle reminder!
Hm, I thought there had been some feedback already? I've been waiting
for a respin.
