On 01/08/2018 07:27 PM, Mark Grosen wrote:
On Mon, Jan 8, 2018 at 10:08 AM David Lechner <da...@lechnology.com
<mailto:da...@lechnology.com>> wrote:
On 01/07/2018 05:59 PM, Mark Grosen wrote:
> I am trying to get the kernel driver for the ssd1306 working with the
PocketBeagle USB HUB cape which has a 64x32 SSD1306 display
(https://www.tindie.com/products/microwavemont/oled-with-24-port-usb-hub-cape-for-pocketbeagle/)
I know it is physically working as I can use it via user-mode I2C. I believe a
small change is needed to support the unusual 64 pixel width of this board. I have
built and loaded a new kernel and have a .dtbo
And what does your device tree overlay look like?
/dts-v1/;
/plugin/;
#include <dt-bindings/board/am335x-bbw-bbb-base.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>
/ {
fragment@0 {
target = <&i2c1>;
__overlay__ {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
ssd1306: oled@3c {
compatible = "solomon,ssd1306fb-i2c";
reg = <0x3c>;
solomon,width = <64>;
solomon,height = <32>;
solomon,page-offset = <0>;
};
};
};
};
> loaded via u-boot with 4.4.88-ti-r128 kernel. It shows up in
/proc/device-tree correctly (at least as far as I can tell - the entries match the
dts values). I am missing how to get this connected to the framebuffer world -
there is no /dev/fb0 showing up. I see the config options appear to be enabled (I
am using the defconfig).
And which options did you enable/are enabled?
mark@pocket:~$ zcat /proc/config.gz | grep CONFIG_FB | grep -v '#'
CONFIG_FB=y
CONFIG_FB_CMDLINE=y
CONFIG_FB_NOTIFY=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
CONFIG_FB_SYS_FILLRECT=y
CONFIG_FB_SYS_COPYAREA=y
CONFIG_FB_SYS_IMAGEBLIT=y
CONFIG_FB_SYS_FOPS=y
CONFIG_FB_DEFERRED_IO=y
CONFIG_FB_BACKLIGHT=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
CONFIG_FB_SMSCUFX=m
CONFIG_FB_UDL=m
CONFIG_FB_SIMPLE=y
CONFIG_FB_SSD1307=y
Looks alright to me. Is there any error in `dmesg`?
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