Hi Laurent, On 04/19/2018 01:09 PM, Laurent Pinchart wrote: > Hi Philippe, > > On Thursday, 19 April 2018 12:31:15 EEST Philippe CORNU wrote: >> On 04/19/2018 10:11 AM, Laurent Pinchart wrote: >>> On Tuesday, 10 April 2018 08:19:26 EEST Philippe Cornu wrote: >>> >>>> Add the 3 optional power supplies using the exact description >>>> found in the document named >>>> "SiI9022A/SiI9024A HDMI Transmitter Data Sheet (August 2016)". >>>> >>>> Signed-off-by: Philippe Cornu <philippe.cornu@xxxxxx> >>>> --- >>>> >>>> Documentation/devicetree/bindings/display/bridge/sii902x.txt | 3 +++ >>>> 1 file changed, 3 insertions(+) >>>> >>>> diff --git >>>> a/Documentation/devicetree/bindings/display/bridge/sii902x.txt >>>> b/Documentation/devicetree/bindings/display/bridge/sii902x.txt index >>>> 56a3e68ccb80..cf53678fe574 100644 >>>> --- a/Documentation/devicetree/bindings/display/bridge/sii902x.txt >>>> +++ b/Documentation/devicetree/bindings/display/bridge/sii902x.txt >>>> @@ -8,6 +8,9 @@ Optional properties: >>>> - interrupts-extended or interrupt-parent + interrupts: describe >>>> the interrupt line used to inform the host about hotplug events. >>>> - reset-gpios: OF device-tree gpio specification for RST_N pin. >>>> + - iovcc-supply: I/O supply voltage (1.8V or 3.3V, host-dependent). >>>> + - avcc12-supply: TMDS analog supply voltage (1.2V). >>>> + - cvcc12-supply: Digital core supply voltage (1.2V). >>> >>> It seems that the AVCC12 and CVCC12 power supplies are usually derived >>> from the same source. How about starting with one DT property for both, >>> and adding a second one later if needed ? >> >> Well, I do not know what is the best. Here I took the description from >> the documentation, and to allow all possible board configurations, I >> added these supplies as "optional" properties: if there is only one 1v2 >> regulator on the board, the dt will contain only avcc12 or cvcc12 and >> everything will work fine (we will have a dummy regulator for the >> missing optional 1v2 reg), if both regulators are there for any reasons >> (stability, noise, whatever...) then both entries will be in the dt. >> >> If you confirm you prefer a single 1v2 supply (named for instance >> "vcc12-supply") then I will do :-) > > Please see https://lists.freedesktop.org/archives/dri-devel/2018-April/ > 172400.html (and the messages that lead to it) and https:// > lists.freedesktop.org/archives/dri-devel/2018-March/170763.html. > Thanks for this discussion thread. On my side, I found "CVCC12 and AVCC12 can be derived from the same power source" written with a small font (august 2016 datasheet p13) so then your advice is clearly what we have to do :-) I will add this info in v2 too. Thank you, Philippe :-) >>>> Optional subnodes: >>>> - video input: this subnode can contain a video input port node > ��.n��������+%������w��{.n����z�{��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
