Changes between Version 30 and Version 31 of venice/mipi

Timestamp:

03/22/2023 10:57:28 PM (3 years ago)

Author:

Ryan Erbstoesser

Comment:

add additional information

venice/mipi

@@ -103 +103 @@
 Gateworks can also be hired to create custom audio designs. 
 
+=== Adding a New Venice MIPI DSI Display
+
+Please note, a display of any kind needs a software driver for the chip used on the display as well as a software driver for the IMX MIPI-DSI controller. These drivers are not trivial and if a chip is on the display that doesn't have an existing driver for it, one will need datasheets and reference manuals to write the driver - this is not an easy lift and would require strong software expertise. 
+
+Please note this software effort has basically already been completed for our pre-approved and tested displays  [#rpi here]
+
+Note for use of other displays there are several MIPI DSI bridge chips with Linux drivers listed in: 
+[https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/bridge/Kconfig]
+
+Note that it is difficult to obtain software documentation for these chips, including the ones there so it would be wise to only try using something with a MIPI-DSI bridge chip that is already supported.
+
+For example:
+The raspberry pi 7-inch display uses:
+- TC358762 MIPI DSI to DBI bridge which does have a driver in mainline: https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/bridge/tc358762.c
+- ATTINY controller with proprietary firmware implementing a regulator and PWM controller over I2C - its undocumented but luckily there is a driver for it in mainline: https://elixir.bootlin.com/linux/latest/source/drivers/regulator/rpi-panel-attiny-regulator.c
+- Powertip ph800480t013-idf02 LCD - support for it is in the drm simple-panel driver: https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/panel/panel-simple.c
+- Focaltec FT5604 touch controller - support for it is in https://elixir.bootlin.com/linux/latest/source/drivers/input/touchscreen/edt-ft5x06.c
+
 [=#software]
 == Venice MIPI DSI / CSI Software
@@ -108 +126 @@
 '''This wiki page covers all hardware related information to the Venice MIPI interfaces. Software is also a very important aspect, and all software information is covered on the [wiki:venice/multimedia] page.'''
 
-Please note, a display of any kind needs a software driver for the chip used on the display as well as a software driver for the IMX MIPI-DSI controller. These drivers are not trivial and if a chip is on the display that doesn't have an existing driver for it, one will need datasheets and reference manuals to write the driver - this is not an easy lift and would require strong software expertise. 
-
-Please note this software effort has basically already been completed for our pre-approved and tested displays  [#rpi here]
 
 == MIPI-CSI Camera Support