linux-kernel - Re: [Patch v2 01/15] dt-bindings: media: s5p-mfc: Add new DT schema for MFC

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Date:   Thu, 8 Sep 2022 17:11:16 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Aakarsh Jain <aakarsh.jain@...sung.com>,
        'Krzysztof Kozlowski' <krzysztof.kozlowski@...aro.org>,
        'Smitha T Murthy' <smitha.t@...sung.com>,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:     m.szyprowski@...sung.com, andrzej.hajda@...el.com,
        mchehab@...nel.org, hverkuil-cisco@...all.nl,
        ezequiel@...guardiasur.com.ar, jernej.skrabec@...il.com,
        benjamin.gaignard@...labora.com, stanimir.varbanov@...aro.org,
        dillon.minfei@...il.com, david.plowman@...pberrypi.com,
        mark.rutland@....com, robh+dt@...nel.org, krzk+dt@...nel.org,
        andi@...zian.org, alim.akhtar@...sung.com,
        aswani.reddy@...sung.com, pankaj.dubey@...sung.com,
        linux-fsd@...la.com
Subject: Re: [Patch v2 01/15] dt-bindings: media: s5p-mfc: Add new DT schema
 for MFC

On 08/09/2022 14:56, Aakarsh Jain wrote:
> 
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...aro.org]
>> Sent: 07 September 2022 16:52
>> To: Smitha T Murthy <smitha.t@...sung.com>; linux-arm-
>> kernel@...ts.infradead.org; linux-media@...r.kernel.org; linux-
>> kernel@...r.kernel.org; devicetree@...r.kernel.org
>> Cc: m.szyprowski@...sung.com; andrzej.hajda@...el.com;
>> mchehab@...nel.org; hverkuil-cisco@...all.nl;
>> ezequiel@...guardiasur.com.ar; jernej.skrabec@...il.com;
>> benjamin.gaignard@...labora.com; stanimir.varbanov@...aro.org;
>> dillon.minfei@...il.com; david.plowman@...pberrypi.com;
>> mark.rutland@....com; robh+dt@...nel.org; krzk+dt@...nel.org;
>> andi@...zian.org; alim.akhtar@...sung.com; aswani.reddy@...sung.com;
>> pankaj.dubey@...sung.com; linux-fsd@...la.com;
>> aakarsh.jain@...sung.com
>> Subject: Re: [Patch v2 01/15] dt-bindings: media: s5p-mfc: Add new DT
>> schema for MFC
>>
>> On 07/09/2022 08:47, Smitha T Murthy wrote:
>>> Adds DT schema for s5p-mfc in yaml format
>>
>> s/Adds/Convert/
>> (as convert to DT schema)
>>
> ok, I will change.
> 
>> Please mention here changes to original binding (I see at least adding
>> iommus and dropping some properties).
>>
> ok. I will make this changes. 
>>>
>>> Signed-off-by: Aakarsh Jain <aakarsh.jain@...sung.com>
>>> Signed-off-by: Smitha T Murthy <smitha.t@...sung.com>
>>> ---
>>>  .../devicetree/bindings/media/s5p-mfc.txt     |  77 +------------
>>>  .../bindings/media/samsung,s5p-mfc.yaml       | 109
>> ++++++++++++++++++
>>>  2 files changed, 110 insertions(+), 76 deletions(-)  create mode
>>> 100644 Documentation/devicetree/bindings/media/samsung,s5p-mfc.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/media/s5p-mfc.txt
>>> b/Documentation/devicetree/bindings/media/s5p-mfc.txt
>>> index aa54c8159d9f..0b7c4dd40095 100644
>>> --- a/Documentation/devicetree/bindings/media/s5p-mfc.txt
>>> +++ b/Documentation/devicetree/bindings/media/s5p-mfc.txt
>>> @@ -1,76 +1 @@
>>> -* Samsung Multi Format Codec (MFC)
>>> -
>>> -Multi Format Codec (MFC) is the IP present in Samsung SoCs which
>>> -supports high resolution decoding and encoding functionalities.
>>> -The MFC device driver is a v4l2 driver which can encode/decode -video
>>> raw/elementary streams and has support for all popular -video codecs.
>>> -
>>> -Required properties:
>>> -  - compatible : value should be either one among the following
>>> -	(a) "samsung,mfc-v5" for MFC v5 present in Exynos4 SoCs
>>> -	(b) "samsung,mfc-v6" for MFC v6 present in Exynos5 SoCs
>>> -	(c) "samsung,mfc-v7" for MFC v7 present in Exynos5420 SoC
>>> -	(d) "samsung,mfc-v8" for MFC v8 present in Exynos5800 SoC
>>> -	(e) "samsung,exynos5433-mfc" for MFC v8 present in Exynos5433
>> SoC
>>> -	(f) "samsung,mfc-v10" for MFC v10 present in Exynos7880 SoC
>>> -
>>> -  - reg : Physical base address of the IP registers and length of memory
>>> -	  mapped region.
>>> -
>>> -  - interrupts : MFC interrupt number to the CPU.
>>> -  - clocks : from common clock binding: handle to mfc clock.
>>> -  - clock-names : from common clock binding: must contain "mfc",
>>> -		  corresponding to entry in the clocks property.
>>> -
>>> -Optional properties:
>>> -  - power-domains : power-domain property defined with a phandle
>>> -			   to respective power domain.
>>> -  - memory-region : from reserved memory binding: phandles to two
>> reserved
>>> -	memory regions, first is for "left" mfc memory bus interfaces,
>>> -	second if for the "right" mfc memory bus, used when no SYSMMU
>>> -	support is available; used only by MFC v5 present in Exynos4 SoCs
>>> -
>>> -Obsolete properties:
>>> -  - samsung,mfc-r, samsung,mfc-l : support removed, please use memory-
>> region
>>> -	property instead
>>
>> When did they become obsolete? Is it enough of time to remove them?
> 
> these properties were there earlier, we didn't added them in obsolete properties.

This is not the answer to my question. Is it enough of time to remove
deprecated properties?



Best regards,
Krzysztof