Hi Eric, On Monday 15 May 2017 17:03:29 Eric Anholt wrote: > Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> writes: > > On Thursday 11 May 2017 16:56:23 Eric Anholt wrote: > >> The Raspberry Pi 7" Touchscreen is a DPI touchscreen panel with > >> DSI->DPI bridge and touchscreen controller integrated, that connects > >> to the Raspberry Pi through its 15-pin "DSI" connector (some lines are > >> DSI, some lines are I2C). > >> > >> This device is represented in the DT as three nodes (DSI device, I2C > >> device, panel). Input will be left to a separate binding later, as it > >> will be a basic I2C client device. > >> > >> Signed-off-by: Eric Anholt <eric@xxxxxxxxxx> > >> --- > >> > >> .../raspberrypi,7inch-touchscreen-bridge.txt | 68 +++++++++++++++ > >> .../panel/raspberrypi,7inch-touchscreen-panel.txt | 7 +++ > >> 2 files changed, 75 insertions(+) > >> create mode 100644 > >> > >> Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-touchs > >> cr > >> een-bridge.txt create mode 100644 > >> Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchsc > >> re > >> en-panel.txt > >> > >> diff --git > >> a/Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-touc > >> hs > >> creen-bridge.txt > >> b/Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-touc > >> hs > >> creen-bridge.txt new file mode 100644 > >> index 000000000000..a5669beaf68f > >> --- /dev/null > >> +++ > >> b/Documentation/devicetree/bindings/display/bridge/raspberrypi,7inch-touc > >> hs > >> creen-bridge.txt @@ -0,0 +1,68 @@ > >> +Official 7" (800x480) Raspberry Pi touchscreen panel's bridge. > >> + > >> +This DSI panel contains: > >> + > >> +- TC358762 DSI->DPI bridge > >> +- Atmel microcontroller on I2C for power sequencing the DSI bridge and > >> + controlling backlight > >> +- Touchscreen controller on I2C for touch input > >> + > >> +and this covers the TC358762 bridge and Atmel microcontroller, while > >> +../panel/raspberrypi,7inch-touchscreen-panel.txt covers the panel. > > > > The TC358762 is a standalone bridge that doesn't depend on the ATTiny > > microcontroller used by the RPI. As it's usable standalone, I believe this > > binding should be split in two. > > Do you have a plan for how I would implement a driver on top of that > binding change, though? Note that we don't program the Toshiba > directly, we only send commands to the Atmel. I'm not too familiar with the hardware architecture, let me have a look. Is the schematics publicly available somewhere ? -- Regards, Laurent Pinchart _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
