Re: [PATCH 2/2] drm/msm/hdmi: add hdmi hdcp support (V2)

From: Bjorn Andersson
Date: Wed Feb 11 2015 - 17:24:08 EST

On Wed, Feb 11, 2015 at 10:59 AM, <jilaiw@xxxxxxxxxxxxxx> wrote:
> There is one issue to use i2c_smbus_XX functions:
> i2c_smbus_read_i2c_block_data has limitation with the maximum count
> But in function hdmi_hdcp_recv_ksv_fifo, since the downstream ksv_fifo
> size will exceed this limitation and must be read in a single transaction,
> we can't use this function then.

That's interesting, because we have the same problem in the Synaptics
driver, where we want to read more than 32 bytes with a method that
follows the smbus flow.

Wolfram, do you have any input on making i2c_smbus* functions work for
larger accesses? Or should we just conclude that it's not "smbus" and
open code this in the various places?

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