On 02/28/14 14:47, Philipp Zabel wrote: > Am Freitag, den 28.02.2014, 13:57 +0100 schrieb Sebastian Hesselbarth: >> On 02/28/14 13:20, Tomi Valkeinen wrote: >>> This series is a re-send of >>> http://article.gmane.org/gmane.linux.drivers.devicetree/61739 >>> >> ... >>> Shortly about the display components in the series, in the order of probable >>> public interest: >>> >>> * Analog TV, DVI and HDMI Connectors represent a respective connector on the >>> board. They don't do much, but they do mark the end of the video >>> pipeline (from >>> the board's pov), and they should also in the future offer ways to >>> handle >>> things like the +5V pin on DVI and HDMI connector and HPD pin. >>> >>> * MIPI DPI panel and MIPI DSI CM panels represent bindings for simple panels >>> using the respective video bus. >>> >>> * Sony acx565akm is an SPI controlled panel using flatlink video bus. >>> >>> * TFP410 is a DPI to DVI encoder. >>> >>> * TPD12S015 is a HDMI companion chip, used on OMAP boards. >> >> Tomi, >> >> Out of curiosity, will there be DT nodes for pull-up resistors soon, >> too? ;) >> >> Honestly, TPD12S015 is a level shifter, there is nothing in it that >> would justify a DT node nor a driver. >> >> Above you already note, that connector nodes should offer HPD in the >> future, but I guess the binding should represent that now already. >> I will be a DT stub anyway, the corresponding video sink driver will >> have to look it up. >> >> Looking through the bindings for DVI and HDMI, I guess HPD gpio is >> better kept in those nodes. From the relevant (DT) properties DVI and >> HDMI connectors are in no way different. > > I like the idea of adding actual connector nodes to the board device > trees. A TV encoder driver for example could this way detect from the > device tree whether it is connected to a VGA, Composite, or S-Video > connector (or maybe to both Composite and S-Video connectors at the same > time).
I agree that different connectors help providing a better user-experienced view of board layout. But I doubt that besides the differentiation (HDMI, DVI, VGA, SVideo, ...) and the endpoint there should be anything more in that node. Sebastian
