Messages in this thread | | | Subject | Re: [PATCH 1/8] ARM: dts: bcm283x: Define standard pinctrl groups in the gpio node. | From | Dave Stevenson <> | Date | Sun, 11 Sep 2016 22:22:36 +0100 |
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On 09/09/16 22:20, Eric Anholt wrote: > e<#secure method=pgpmime mode=sign> > Gerd Hoffmann <kraxel@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."
On the forum there are some that report they have used DPI in RGB888, but they're not using the Kippah. I had mentioned this to Phil E that there should be a dpi18 overlay, but not got around to sorting that.
> > _______________________________________________ > linux-rpi-kernel mailing list > linux-rpi-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-rpi-kernel >
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