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* [PATCH] media: docs-rst: Clarify duration of LP-11 mode
@ 2019-08-11 17:36 Steve Longerbeam
  2019-08-12  8:53 ` Ian Arkver
  0 siblings, 1 reply; 3+ messages in thread
From: Steve Longerbeam @ 2019-08-11 17:36 UTC (permalink / raw)
  To: linux-media
  Cc: Sakari Ailus, Steve Longerbeam, Mauro Carvalho Chehab, linux-kernel

Add a sentence that makes it more clear when the CSI-2 transmitter
must, if possible, exit LP-11 mode. That is, maintain LP-11 mode
until stream on, at which point the transmitter activates the clock
lane and transition to HS mode.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
---
 Documentation/media/kapi/csi2.rst | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Documentation/media/kapi/csi2.rst b/Documentation/media/kapi/csi2.rst
index a7e75e2eba85..6cd1d4b0df17 100644
--- a/Documentation/media/kapi/csi2.rst
+++ b/Documentation/media/kapi/csi2.rst
@@ -49,9 +49,13 @@ where
 
 The transmitter drivers must, if possible, configure the CSI-2
 transmitter to *LP-11 mode* whenever the transmitter is powered on but
-not active. Some transmitters do this automatically but some have to
-be explicitly programmed to do so, and some are unable to do so
-altogether due to hardware constraints.
+not active, and maintain *LP-11 mode* until stream on. Only until
+stream on should the transmitter activate the clock on the clock lane
+and transition to *HS mode*.
+
+Some transmitters do this automatically but some have to be explicitly
+programmed to do so, and some are unable to do so altogether due to
+hardware constraints.
 
 Stopping the transmitter
 ^^^^^^^^^^^^^^^^^^^^^^^^
-- 
2.17.1


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] media: docs-rst: Clarify duration of LP-11 mode
  2019-08-11 17:36 [PATCH] media: docs-rst: Clarify duration of LP-11 mode Steve Longerbeam
@ 2019-08-12  8:53 ` Ian Arkver
  2019-08-12 21:39   ` Steve Longerbeam
  0 siblings, 1 reply; 3+ messages in thread
From: Ian Arkver @ 2019-08-12  8:53 UTC (permalink / raw)
  To: Steve Longerbeam, linux-media
  Cc: Sakari Ailus, Mauro Carvalho Chehab, open list

Hi Steve,

On 11/08/2019 18:36, Steve Longerbeam wrote:
> Add a sentence that makes it more clear when the CSI-2 transmitter
> must, if possible, exit LP-11 mode. That is, maintain LP-11 mode
> until stream on, at which point the transmitter activates the clock
> lane and transition to HS mode.
> 
> Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
> ---
>   Documentation/media/kapi/csi2.rst | 10 +++++++---
>   1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/media/kapi/csi2.rst b/Documentation/media/kapi/csi2.rst
> index a7e75e2eba85..6cd1d4b0df17 100644
> --- a/Documentation/media/kapi/csi2.rst
> +++ b/Documentation/media/kapi/csi2.rst
> @@ -49,9 +49,13 @@ where
>   
>   The transmitter drivers must, if possible, configure the CSI-2
>   transmitter to *LP-11 mode* whenever the transmitter is powered on but
> -not active. Some transmitters do this automatically but some have to
> -be explicitly programmed to do so, and some are unable to do so
> -altogether due to hardware constraints.
> +not active, and maintain *LP-11 mode* until stream on. Only until

s/until/at/ perhaps?

Regards,
Ian
> +stream on should the transmitter activate the clock on the clock lane
> +and transition to *HS mode*.
> +
> +Some transmitters do this automatically but some have to be explicitly
> +programmed to do so, and some are unable to do so altogether due to
> +hardware constraints.
>   
>   Stopping the transmitter
>   ^^^^^^^^^^^^^^^^^^^^^^^^
> 

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH] media: docs-rst: Clarify duration of LP-11 mode
  2019-08-12  8:53 ` Ian Arkver
@ 2019-08-12 21:39   ` Steve Longerbeam
  0 siblings, 0 replies; 3+ messages in thread
From: Steve Longerbeam @ 2019-08-12 21:39 UTC (permalink / raw)
  To: Ian Arkver, linux-media; +Cc: Sakari Ailus, Mauro Carvalho Chehab, open list

Hi Ian,

On 8/12/19 1:53 AM, Ian Arkver wrote:
> Hi Steve,
>
> On 11/08/2019 18:36, Steve Longerbeam wrote:
>> Add a sentence that makes it more clear when the CSI-2 transmitter
>> must, if possible, exit LP-11 mode. That is, maintain LP-11 mode
>> until stream on, at which point the transmitter activates the clock
>> lane and transition to HS mode.
>>
>> Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
>> ---
>>   Documentation/media/kapi/csi2.rst | 10 +++++++---
>>   1 file changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/Documentation/media/kapi/csi2.rst 
>> b/Documentation/media/kapi/csi2.rst
>> index a7e75e2eba85..6cd1d4b0df17 100644
>> --- a/Documentation/media/kapi/csi2.rst
>> +++ b/Documentation/media/kapi/csi2.rst
>> @@ -49,9 +49,13 @@ where
>>     The transmitter drivers must, if possible, configure the CSI-2
>>   transmitter to *LP-11 mode* whenever the transmitter is powered on but
>> -not active. Some transmitters do this automatically but some have to
>> -be explicitly programmed to do so, and some are unable to do so
>> -altogether due to hardware constraints.
>> +not active, and maintain *LP-11 mode* until stream on. Only until
>
> s/until/at/ perhaps?

Sure, that's a bit better language.

Steve

>
> Regards,
> Ian
>> +stream on should the transmitter activate the clock on the clock lane
>> +and transition to *HS mode*.
>> +
>> +Some transmitters do this automatically but some have to be explicitly
>> +programmed to do so, and some are unable to do so altogether due to
>> +hardware constraints.
>>     Stopping the transmitter
>>   ^^^^^^^^^^^^^^^^^^^^^^^^
>>


^ permalink raw reply	[flat|nested] 3+ messages in thread

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2019-08-11 17:36 [PATCH] media: docs-rst: Clarify duration of LP-11 mode Steve Longerbeam
2019-08-12  8:53 ` Ian Arkver
2019-08-12 21:39   ` Steve Longerbeam

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