Dave Stevenson <linux-rpi-ker...@destevenson.freeserve.co.uk> writes:
> On 09/09/16 22:20, Eric Anholt wrote: >> e<#secure method=pgpmime mode=sign> >> Gerd Hoffmann <kra...@redhat.com> writes: >> >>> Hi, >>> >>>> According to this page [1] the pinctrl group for parallel display >>>> interface is >>>> missing. Is it intended? >>>> >>>> [1] - http://elinux.org/RPi_BCM2835_GPIOs >>> Just an oversight I guess. Eric? >>> >>> Does this look correct? >>> >>> + dpi_gpio4: dpi_gpio4 { >>> + brcm,pins = <4 5 6 7 8 9 10 11 12 13 >>> + 14 15 16 17 18 19 20 21 >>> + 22 23 24 25 26 27>; >>> + brcm,function = <BCM2835_FSEL_ALT2>; >>> + }; >> For DPI, you also need pins 0-3 in there for clock and syncs. >> >> That set of data pins would be for a 24-bit mode, which is what we >> should be using for the Adafruit kippah + 7" panel combo. > The Kippah is only 18bit, RGB666. > https://www.adafruit.com/products/2454 > "The pins used are GPIO 2 through 21 inclusive. That means you don't get > the UART RX/TX pins (no console cable) and you don't get the standard > user I2C pins, the EEPROM I2C pins, or hardware SPI pins. You do get to > use pins #22, #23, #24, #25, #26 and #27, and the USB ports are fine to > use too." I was confused because my pinctrl was set up for 18, but the panel driver for it is set up for 24. It looks like 18 is right, so I should probably correct the panel driver.
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