[PATCH 2/7] drm/omap: tweak HDMI DDC timings

Alejandro Hernandez ajhernandez at ti.com
Thu Sep 26 14:40:26 UTC 2019

On 9/26/19 8:54 AM, Tomi Valkeinen wrote:
> On 03/09/2019 17:23, Laurent Pinchart wrote:
>> Hi Tomi,
>> Thank you for the path.
>> On Mon, Sep 02, 2019 at 03:53:54PM +0300, Tomi Valkeinen wrote:
>>> From: Alejandro Hernandez <ajhernandez at ti.com>
>>> A "HDMI I2C Master Error" is sometimes reported with the current DDC 
>>> SCL
>>> timings. The current settings for a 10us SCL period (100 KHz) causes 
>>> the
>>> error with some displays.  This patch increases the SCL signal period
>>> from 10us to 10.2us, with the new settings the error is not observed
>> It would be useful to document what those "some displays" are if you
>> can.
> Unfortunately I have no idea. This was quite a while ago.
> Alejandro, do you recall?

Not at this point, we threw out a bunch of equipment out during the move 
to the new office last year. I could only find one and it has no 
identifying information on it.


>  Tomi

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