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From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: "J.D. Schroeder" <Linux.HWI@garmin.com>
Cc: linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
	linux-fbdev@vger.kernel.org, misael.lopez@ti.com,
	Jim Lodes <jim.lodes@garmin.com>,
	"J.D. Schroeder" <jay.schroeder@garmin.com>
Subject: Re: [PATCH v2] OMAPDSS: HDMI5: Change DDC timings
Date: Wed, 27 Apr 2016 05:55:05 +0000	[thread overview]
Message-ID: <57205439.3010303@ti.com> (raw)
In-Reply-To: <1461259669-5194-1-git-send-email-Linux.HWI@garmin.com>


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On 21/04/16 20:27, J.D. Schroeder wrote:
> From: Jim Lodes <jim.lodes@garmin.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@garmin.com>
> Signed-off-by: J.D. Schroeder <jay.schroeder@garmin.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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WARNING: multiple messages have this Message-ID (diff)
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: "J.D. Schroeder" <Linux.HWI@garmin.com>
Cc: linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
	linux-fbdev@vger.kernel.org, misael.lopez@ti.com,
	Jim Lodes <jim.lodes@garmin.com>,
	"J.D. Schroeder" <jay.schroeder@garmin.com>
Subject: Re: [PATCH v2] OMAPDSS: HDMI5: Change DDC timings
Date: Wed, 27 Apr 2016 08:55:05 +0300	[thread overview]
Message-ID: <57205439.3010303@ti.com> (raw)
In-Reply-To: <1461259669-5194-1-git-send-email-Linux.HWI@garmin.com>


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On 21/04/16 20:27, J.D. Schroeder wrote:
> From: Jim Lodes <jim.lodes@garmin.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@garmin.com>
> Signed-off-by: J.D. Schroeder <jay.schroeder@garmin.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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WARNING: multiple messages have this Message-ID (diff)
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: "J.D. Schroeder" <Linux.HWI@garmin.com>
Cc: <linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>,
	<linux-fbdev@vger.kernel.org>, <misael.lopez@ti.com>,
	Jim Lodes <jim.lodes@garmin.com>,
	"J.D. Schroeder" <jay.schroeder@garmin.com>
Subject: Re: [PATCH v2] OMAPDSS: HDMI5: Change DDC timings
Date: Wed, 27 Apr 2016 08:55:05 +0300	[thread overview]
Message-ID: <57205439.3010303@ti.com> (raw)
In-Reply-To: <1461259669-5194-1-git-send-email-Linux.HWI@garmin.com>


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On 21/04/16 20:27, J.D. Schroeder wrote:
> From: Jim Lodes <jim.lodes@garmin.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@garmin.com>
> Signed-off-by: J.D. Schroeder <jay.schroeder@garmin.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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  reply	other threads:[~2016-04-27  5:55 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-21  0:02 [PATCH] OMAPDSS: HDMI5: Change DDC timings J.D. Schroeder
2016-04-21  0:02 ` J.D. Schroeder
2016-04-21  0:02 ` J.D. Schroeder
2016-04-21 14:38 ` Tomi Valkeinen
2016-04-21 14:38   ` Tomi Valkeinen
2016-04-21 14:38   ` Tomi Valkeinen
2016-04-21 16:04   ` J.D. Schroeder
2016-04-21 16:04     ` J.D. Schroeder
2016-04-21 16:04     ` J.D. Schroeder
2016-04-21 17:27 ` [PATCH v2] " J.D. Schroeder
2016-04-21 17:27   ` J.D. Schroeder
2016-04-21 17:27   ` J.D. Schroeder
2016-04-27  5:55   ` Tomi Valkeinen [this message]
2016-04-27  5:55     ` Tomi Valkeinen
2016-04-27  5:55     ` Tomi Valkeinen

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