Hello Peter,
Thank you for your feedback!
> Subject: Re: [RFC] drm/bridge/sii902x: Fix EDID readback
snip
> >
> > To further detail the problem, the system is vulnerable from before the
> > last write
> > performed by sii902x_i2c_bypass_select to after we conf
On 2018-11-01 18:32, Fabrizio Castro wrote:
> Hello Peter,
>
> Thank you for your feedback!
>
>> Subject: Re: [RFC] drm/bridge/sii902x: Fix EDID readback
>
> snip
>
>>>
>>> To further detail the problem, the system is vulnerable
On 2018-11-01 17:04, Fabrizio Castro wrote:
> Hello Peter,
>
> Thank you for your feedback!
>
>>> The "mux-locked" implementation was the one I first tried and I discovered
>>> it doesn't work for me, as other traffic on the parent adapter can get in
>>> the
>>> way. What we need for this
Hello Peter,
Thank you for your feedback!
snip
> > Yeah, there is some issue with locking here, and that's coming down
> > from the fact that when we call into drm_get_edid, we implicitly call
> > i2c_transfer which ultimately locks the i2c adapter, and then calls
> > into our
Hello Peter,
Again, thank you very much for your precious comments.
I'll send a patch out shortly addressing all of the comments I have received so
far,
including yours.
Cheers,
Fab
> Subject: Re: [RFC] drm/bridge/sii902x: Fix EDID readback
>
> On 2018-11-01 18:32, Fabrizio Cas
On 2018-11-01 12:04, Fabrizio Castro wrote:
> Hello Peter,
>
> Thank you for your feedback!
>
> snip
>
>>> Yeah, there is some issue with locking here, and that's coming down
>>> from the fact that when we call into drm_get_edid, we implicitly call
>>> i2c_transfer which ultimately locks the
Hello Peter,
Thank you for your feedback!
> > The "mux-locked" implementation was the one I first tried and I discovered
> > it doesn't work for me, as other traffic on the parent adapter can get in
> > the
> > way. What we need for this device is no other traffic on the bus during the
> >
Hello Mark,
Thank you for your feedback!
> Subject: Re: [RFC] drm/bridge/sii902x: Fix EDID readback
>
> On Wed, Oct 31, 2018 at 04:55:53PM +, Fabrizio Castro wrote:
>
> > Having the option of using "unlocked" flavours of reads and writes
> > is what we need
On Wed, Oct 31, 2018 at 04:55:53PM +, Fabrizio Castro wrote:
> Having the option of using "unlocked" flavours of reads and writes
> is what we need here, but looking at drivers/base/regmap/regmap-i2c.c
> I couldn't find anything suitable for my case, maybe Mark could advise
> on this one? I
Hello Linus,
> Subject: Re: [RFC] drm/bridge/sii902x: Fix EDID readback
>
> Hi Fabrizio,
>
> thanks for your patch!
Thank you for your feedback!
>
> On Wed, Oct 31, 2018 at 1:58 PM Fabrizio Castro
> wrote:
>
> > While adding SiI9022A support to the iwg2
On 2018-10-31 17:55, Fabrizio Castro wrote:
> Hello Linus,
>
>> Subject: Re: [RFC] drm/bridge/sii902x: Fix EDID readback
>>
>> Hi Fabrizio,
>>
>> thanks for your patch!
>
> Thank you for your feedback!
>
>>
>> On Wed, Oct 31, 2018
Hi Fabrizio,
thanks for your patch!
On Wed, Oct 31, 2018 at 1:58 PM Fabrizio Castro
wrote:
> While adding SiI9022A support to the iwg23s board it came up
> that when the HDMI transmitter is in pass through mode the
> device is not compliant with the I2C specification anymore,
> as it requires
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