linux-kernel - Re: [PATCH v2] OMAPDSS: HDMI5: Change DDC timings

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Message-ID: <57205439.3010303@ti.com>
Date:	Wed, 27 Apr 2016 08:55:05 +0300
From:	Tomi Valkeinen <tomi.valkeinen@...com>
To:	"J.D. Schroeder" <Linux.HWI@...min.com>
CC:	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-fbdev@...r.kernel.org>, <misael.lopez@...com>,
	Jim Lodes <jim.lodes@...min.com>,
	"J.D. Schroeder" <jay.schroeder@...min.com>
Subject: Re: [PATCH v2] OMAPDSS: HDMI5: Change DDC timings

On 21/04/16 20:27, J.D. Schroeder wrote:
> From: Jim Lodes <jim.lodes@...min.com>
> 
> The DDC scl high and low times were set to the minimum values
> from the i2c specification, but the i2c specification takes into
> account the rise time and fall time to calculate the frequency.
> To pass HDMI certification DDC can not exceed 100kHz therefore in
> a system where the rise times and fall times are negligible the high
> and low times for scl need to be 10us.
> 
> Signed-off-by: Jim Lodes <jim.lodes@...min.com>
> Signed-off-by: J.D. Schroeder <jay.schroeder@...min.com>
> ---
>  drivers/gpu/drm/omapdrm/dss/hdmi5_core.c          | 4 ++--
>  drivers/video/fbdev/omap2/omapfb/dss/hdmi5_core.c | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)

Thanks! Queuing this for 4.7.

 Tomi



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