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TinyDRM ST7735R Adafruit 1.8" TFT LCD
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| config-pin p9.12 gpio | |
| config-pin p9.15 gpio | |
| config-pin p9.28 spi_cs | |
| config-pin p9.29 spi | |
| config-pin p9.30 spi | |
| config-pin p9.31 spi_sclk | |
| https://plus.google.com/photos/117542001281850354871/album/6211546193314906001/6211546196318199650 | |
| https://plus.google.com/photos/117542001281850354871/album/6211546193314906001/6211546195905450626 | |
| http://beagleboard.org/static/images/cape-headers-spi.png | |
| https://github.com/notro/fbtft/wiki/LCD-Modules | |
| https://www.element14.com/community/community/designcenter/single-board-computers/next-gen_beaglebone/blog/2015/11/24/bbb-fbtft-linux-44-kernel | |
| sudo modprobe fbtft_device busnum=1 name=adafruit18 debug=7 verbose=3 gpios=dc:48,reset:60 | |
| Display image on the LCD display: | |
| sudo apt-get install fbi | |
| wget 'http://beagleboard.org/static/uploads/BorisTux_w_Logo.png' | |
| sudo fbi -d /dev/fb0 -T 1 -a BorisTux_w_Logo.png |
root@beaglebone:~# sudo modprobe fbtft_device busnum=1 name=adafruit18 debug=7 verbose=3 gpios=dc:48,reset:60
root@beaglebone:~# dmesg
[ 1596.148240] fbtft: module is from the staging directory, the quality is unknown, you have been warned.
[ 1596.160859] fbtft_device: module is from the staging directory, the quality is unknown, you have been warned.
[ 1596.162370] spidev spi1.1: spidev spi1.1 16000kHz 8 bits mode=0x00
[ 1596.162384] spidev spi1.0: spidev spi1.0 16000kHz 8 bits mode=0x01
[ 1596.162392] spidev spi2.1: spidev spi2.1 16000kHz 8 bits mode=0x00
[ 1596.162399] spidev spi2.0: spidev spi2.0 16000kHz 8 bits mode=0x01
[ 1596.162591] spidev spi1.0: Deleting spi1.0
[ 1596.163366] fbtft_device: GPIOS used by 'adafruit18':
[ 1596.163372] fbtft_device: 'dc' = GPIO48
[ 1596.163374] fbtft_device: 'reset' = GPIO60
[ 1596.163386] spidev spi1.1: spidev spi1.1 16000kHz 8 bits mode=0x00
[ 1596.163393] spidev spi2.1: spidev spi2.1 16000kHz 8 bits mode=0x00
[ 1596.163399] spidev spi2.0: spidev spi2.0 16000kHz 8 bits mode=0x01
[ 1596.163405] spi spi1.0: fb_st7735r spi1.0 32000kHz 8 bits mode=0x00
[ 1596.199568] fb_st7735r: module is from the staging directory, the quality is unknown, you have been warned.
[ 1596.203964] fb_st7735r spi1.0: fbtft_gamma_parse_str() str=
[ 1596.203975] fb_st7735r spi1.0: 02 1c 07 12 37 32 29 2d 29 25 2B 39 00 01 03 10
03 1d 07 06 2E 2C 29 2D 2E 2E 37 3F 00 00 02 10
[ 1596.204016] fb_st7735r spi1.0: fbtft_request_gpios_match('dc')
[ 1596.204036] fb_st7735r spi1.0: fbtft_request_gpios: gpio_request_one('dc'=48) failed with -16
[ 1596.217931] fb_st7735r: probe of spi1.0 failed with error -16
root@beaglebone:~# cat /boot/uEnv.txt
#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0
uname_r=4.9.82-bone9
#uuid=
#dtb=
###U-Boot Overlays###
###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1
###
###Overide capes with eeprom
#uboot_overlay_addr0=/lib/firmware/<file0>.dtbo
#uboot_overlay_addr1=/lib/firmware/<file1>.dtbo
#uboot_overlay_addr2=/lib/firmware/<file2>.dtbo
#uboot_overlay_addr3=/lib/firmware/<file3>.dtbo
###
###Additional custom capes
uboot_overlay_addr4=/lib/firmware/BB-SPIDEV1-00A0.dtbo
#uboot_overlay_addr5=/lib/firmware/<file5>.dtbo
#uboot_overlay_addr6=/lib/firmware/<file6>.dtbo
#uboot_overlay_addr7=/lib/firmware/<file7>.dtbo
###
###Custom Cape
#dtb_overlay=/lib/firmware/<file8>.dtbo
###
###Disable auto loading of virtual capes (emmc/video/wireless/adc)
disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
disable_uboot_overlay_wireless=1
disable_uboot_overlay_adc=1
###
###PRUSS OPTIONS
###pru_rproc (4.4.x-ti kernel)
#uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo
###pru_uio (4.4.x-ti & mainline/bone kernel)
#uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo
###
###Cape Universal Enable
#enable_uboot_cape_universal=1
###
###Debug: disable uboot autoload of Cape
#disable_uboot_overlay_addr0=1
#disable_uboot_overlay_addr1=1
#disable_uboot_overlay_addr2=1
#disable_uboot_overlay_addr3=1
###
###U-Boot fdt tweaks...
#uboot_fdt_buffer=0x60000
###U-Boot Overlays###
cmdline=coherent_pool=1M net.ifnames=0 quiet
#In the event of edid real failures, uncomment this next line:
#cmdline=coherent_pool=1M net.ifnames=0 quiet video=HDMI-A-1:1024x768@60e
##Example v3.8.x
#cape_disable=capemgr.disable_partno=
#cape_enable=capemgr.enable_partno=
##Example v4.1.x
#cape_disable=bone_capemgr.disable_partno=
#cape_enable=bone_capemgr.enable_partno=
##enable Generic eMMC Flasher:
##make sure, these tools are installed: dosfstools rsync
#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh
root@beaglebone:~# echo '7 7 7 7' > /proc/sys/kernel/printk
root@beaglebone:~# modprobe fbtft_device busnum=1 name=adafruit18 debug=7 verbose=3 gpios=dc:48,reset:60
Feb 19 07:57:10 beaglebone kernel: fbtft: module is from the staging directory, the quality is unknown, you have been warned.
Feb 19 07:57:10 beaglebone kernel: fbtft_device: module is from the staging directory, the quality is unknown, you have been warned.
Feb 19 07:57:10 beaglebone kernel: spidev spi1.1: spidev spi1.1 16000kHz 8 bits mode=0x00
Feb 19 07:57:10 beaglebone kernel: spidev spi1.0: spidev spi1.0 16000kHz 8 bits mode=0x01
Feb 19 07:57:10 beaglebone kernel: spidev spi1.0: Deleting spi1.0
Feb 19 07:57:10 beaglebone kernel: fbtft_device: GPIOS used by 'adafruit18':
Feb 19 07:57:10 beaglebone kernel: fbtft_device: 'dc' = GPIO48
Feb 19 07:57:10 beaglebone kernel: fbtft_device: 'reset' = GPIO60
Feb 19 07:57:10 beaglebone kernel: spidev spi1.1: spidev spi1.1 16000kHz 8 bits mode=0x00
Feb 19 07:57:10 beaglebone kernel: spi spi1.0: fb_st7735r spi1.0 32000kHz 8 bits mode=0x00
Feb 19 07:57:10 beaglebone kernel: fb_st7735r: module is from the staging directory, the quality is unknown, you have been warned.
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_gamma_parse_str() str=
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: 02 1c 07 12 37 32 29 2d 29 25 2B 39 00 01 03 10
03 1d 07 06 2E 2C 29 2D 2E 2E 37 3F 00 00 02 10
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_request_gpios_match('dc')
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_request_gpios: 'dc' = GPIO48
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_request_gpios_match('reset')
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_request_gpios: 'reset' = GPIO60
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_verify_gpios()
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_reset()
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: init: write(0x01)
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_reg8_bus8: 01
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_spi(len=1): 01
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: init: mdelay(150)
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: init: write(0x11)
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_reg8_bus8: 11
Feb 19 07:57:10 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_spi(len=1): 11
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: init: mdelay(500)
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: init: write(0xB1) 0x01 0x2C 0x2D
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_reg8_bus8: b1 01 2c 2d
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_spi(len=1): b1
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_spi(len=3): 01 2c 2d
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: init: write(0xB2) 0x01 0x2C 0x2D
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_reg8_bus8: b2 01 2c 2d
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_spi(len=1): b2
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_spi(len=3): 01 2c 2d
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: init: write(0xB3) 0x01 0x2C 0x2D 0x01 0x2C 0x2D
Feb 19 07:57:11 beaglebone kernel: fb_st7735r spi1.0: fbtft_write_reg8_bus8: b3 01 2c 2d 01 2c 2d
root@beaglebone:/opt/source/bb.org-overlays# git diff
diff --git a/src/arm/BB-SPIDEV1-00A0.dts b/src/arm/BB-SPIDEV1-00A0.dts
index e9d07a0..3574554 100644
--- a/src/arm/BB-SPIDEV1-00A0.dts
+++ b/src/arm/BB-SPIDEV1-00A0.dts
@@ -7,6 +7,9 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+
+#include <dt-bindings/pinctrl/am33xx.h>
+
/dts-v1/;
/plugin/;
@@ -75,6 +78,18 @@
reg = <1>;
spi-max-frequency = <16000000>;
};
+
+ display@0{
+ status = "okay";
+ compatible = "jianda,jd-t18003-t01", "sitronix,st7735r";
+ reg = <0>;
+ spi-max-frequency = <16000000>;
+ /* https://elinux.org/Beagleboard:Cape_Expansion_Headers */
+ dc-gpios = <&gpio1 28 0>; /* dc:48 P9.15 GPIO1_16 */
+ reset-gpios = <&gpio1 16 0>; /* reset:60 P9.12 GPIO1_28 */
+ rotation = <270>;
+ };
+
};
};
};
[ 0.880046] pinctrl-single 44e10800.pinmux: 142 pins, size 568
[ 0.892708] gpio-of-helper ocp:cape-universal: ready
[ 0.895670] wkup_m3_ipc 44e11324.wkup_m3_ipc: could not get rproc handle
[ 0.897279] Serial: 8250/16550 driver, 6 ports, IRQ sharing disabled
[ 0.900349] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 30, base_baud = 3000000) is a 8250
[ 0.917009] console [ttyS0] enabled
[ 0.919988] omap_rng 48310000.rng: Random Number Generator ver. 20
[ 1.109965] pinctrl-single 44e10800.pinmux: pin PIN100 already requested by ocp:P9_31_pinmux; cannot claim for 481a0000.spi
[ 1.121254] pinctrl-single 44e10800.pinmux: pin-100 (481a0000.spi) status -22
[ 1.128440] pinctrl-single 44e10800.pinmux: could not request pin 100 (PIN100) from group pinmux_bb_spi1_pins on device pinctrl-single
[ 1.140686] omap2_mcspi 481a0000.spi: Error applying setting, reverse things back
[ 1.148298] omap2_mcspi: probe of 481a0000.spi failed with error -22
[ 1.148973] libphy: Fixed MDIO Bus: probed
config-pin p9.12 gpio
config-pin p9.15 gpio
config-pin p9.28 spi_cs
config-pin p9.29 spi
config-pin p9.30 spi
config-pin p9.31 spi_sclk
sudo modprobe fbtft_device busnum=1 name=adafruit18 debug=6 verbose=3 gpios=dc:48,reset:60
debian@beaglebone:/opt/source/bb.org-overlays$ git diff
diff --git a/src/arm/BB-SPIDEV1-00A0.dts b/src/arm/BB-SPIDEV1-00A0.dts
index e9d07a0..3574554 100644
--- a/src/arm/BB-SPIDEV1-00A0.dts
+++ b/src/arm/BB-SPIDEV1-00A0.dts
@@ -7,6 +7,9 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+
+#include <dt-bindings/pinctrl/am33xx.h>
+
/dts-v1/;
/plugin/;
@@ -75,6 +78,18 @@
reg = <1>;
spi-max-frequency = <16000000>;
};
+
+ display@0{
+ status = "okay";
+ compatible = "jianda,jd-t18003-t01", "sitronix,st7735r";
+ reg = <0>;
+ spi-max-frequency = <16000000>;
+ /* https://elinux.org/Beagleboard:Cape_Expansion_Headers */
+ dc-gpios = <&gpio1 28 0>; /* dc:48 P9.15 GPIO1_16 */
+ reset-gpios = <&gpio1 16 0>; /* reset:60 P9.12 GPIO1_28 */
+ rotation = <270>;
+ };
+
};
};
};
[ 0.980709] omap2_mcspi 481a0000.spi: chipselect 0 already in use
[ 0.986882] spi_master spi1: spi_device register error /ocp/spi@481a0000/channel@0
[ 0.994544] spi_master spi1: Failed to create SPI device for /ocp/spi@481a0000/channel@0
[ 21.028802] [drm] Initialized st7735r 1.0.0 20171128 for spi1.0 on minor 0
[ 22.568816] random: crng init done
[ 22.902358] Console: switching to colour frame buffer device 20x16
[ 22.902817] st7735r spi1.0: fb0: frame buffer device
debian@beaglebone:/opt/source/bb.org-overlays$ grep -v ^# /boot/uEnv.txt
uname_r=4.16.0-rc2-bone3
enable_uboot_overlays=1
uboot_overlay_addr4=/lib/firmware/BB-SPIDEV1-00A0.dtbo
disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
disable_uboot_overlay_wireless=1
disable_uboot_overlay_adc=1
cmdline=coherent_pool=1M net.ifnames=0 quiet
debian@beaglebone:/opt/source/bb.org-overlays$ lsmod
Module Size Used by
st7735r 16384 0
mipi_dbi 20480 1 st7735r
tinydrm 24576 2 mipi_dbi,st7735r
evdev 24576 1
uio_pdrv_genirq 16384 0
uio 20480 1 uio_pdrv_genirq
8021q 32768 0
garp 16384 1 8021q
mrp 20480 1 8021q
stp 16384 1 garp
llc 16384 2 garp,stp
usb_f_mass_storage 53248 2
usb_f_acm 16384 2
u_serial 20480 3 usb_f_acm
usb_f_ecm 20480 2
usb_f_rndis 32768 2
u_ether 20480 2 usb_f_ecm,usb_f_rndis
libcomposite 61440 16 usb_f_ecm,usb_f_acm,usb_f_mass_storage,usb_f_rndis
iptable_nat 16384 0
nf_conntrack_ipv4 20480 1
nf_defrag_ipv4 16384 1 nf_conntrack_ipv4
nf_nat_ipv4 16384 1 iptable_nat
nf_nat 28672 1 nf_nat_ipv4
nf_conntrack 139264 3 nf_conntrack_ipv4,nf_nat_ipv4,nf_nat
iptable_mangle 16384 0
iptable_filter 16384 0
binfmt_misc 20480 1
spidev 20480 0
ip_tables 24576 3 iptable_mangle,iptable_filter,iptable_nat
x_tables 36864 3 iptable_mangle,ip_tables,iptable_filter
debian@beaglebone:~$ ls -ltar /dev/fb*
crw-rw---- 1 root video 29, 0 Feb 20 07:27 /dev/fb0
https://github.com/notro/tinydrm/wiki/Tools
https://github.com/notro/tinydrm/wiki/Development
notro/tinydrm#2
https://github.com/notro/tinydrm/wiki/board:-Raspberry-Pi
https://github.com/notro/tinydrm/wiki/fbtft
https://github.com/notro/fbtft/wiki/How-it-works
https://gist.github.com/pdp7/b1cc9b5a25a0c25153b24e0e75964db0
debian@beaglebone:~/libdrm$ find /dev/dri/
/dev/dri/
/dev/dri/card0
debian@beaglebone:~/libdrm$ sudo fbi -d /dev/dri/card0 -i
using "DejaVu Sans Mono-16", pixelsize=16.67 file=/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf
ioctl VT_GETSTATE: Inappropriate ioctl for device (not a linux console?)
[ 1260.017213] [drm:mipi_dbi_fb_dirty [mipi_dbi]] Flushing [FB:34] x1=144, x2=152, y1=72, y2=80
[ 1260.017247] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2a, par=00 90 00 97
[ 1260.017325] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2b, par=00 48 00 4f
[ 1260.017359] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2c, len=128
[ 1260.221236] [drm:mipi_dbi_fb_dirty [mipi_dbi]] Flushing [FB:34] x1=144, x2=152, y1=72, y2=80
[ 1260.221269] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2a, par=00 90 00 97
[ 1260.221348] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2b, par=00 48 00 4f
[ 1260.221384] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2c, len=128
[ 1260.425221] [drm:mipi_dbi_fb_dirty [mipi_dbi]] Flushing [FB:34] x1=144, x2=152, y1=72, y2=80
[ 1260.425255] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2a, par=00 90 00 97
[ 1260.425333] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2b, par=00 48 00 4f
[ 1260.425368] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2c, len=128
[ 1260.629268] [drm:mipi_dbi_fb_dirty [mipi_dbi]] Flushing [FB:34] x1=144, x2=152, y1=72, y2=80
[ 1260.629302] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2a, par=00 90 00 97
[ 1260.629384] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2b, par=00 48 00 4f
[ 1260.629420] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2c, len=128
[ 1260.833261] [drm:mipi_dbi_fb_dirty [mipi_dbi]] Flushing [FB:34] x1=144, x2=152, y1=72, y2=80
[ 1260.833297] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2a, par=00 90 00 97
[ 1260.833379] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2b, par=00 48 00 4f
[ 1260.833413] [drm:mipi_dbi_typec3_command [mipi_dbi]] cmd=2c, len=128
root@beaglebone:~/tinydrm# apt-get install linux-headers-4.16.0-rc2-bone3
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
linux-headers-4.16.0-rc2-bone3
0 upgraded, 1 newly installed, 0 to remove and 4 not upgraded.
Need to get 11.4 MB of archives.
After this operation, 78.6 MB of additional disk space will be used.
Get:1 http://repos.rcn-ee.com/debian stretch/main armhf linux-headers-4.16.0-rc2-bone3 armhf 1stretch [11.4 MB]
Fetched 11.4 MB in 2s (5,633 kB/s)
Selecting previously unselected package linux-headers-4.16.0-rc2-bone3.
(Reading database ... 106281 files and directories currently installed.)
Preparing to unpack .../linux-headers-4.16.0-rc2-bone3_1stretch_armhf.deb ...
Unpacking linux-headers-4.16.0-rc2-bone3 (1stretch) ...
Setting up linux-headers-4.16.0-rc2-bone3 (1stretch) ...
root@beaglebone:~/tinydrm# less README.md ^C
root@beaglebone:~/tinydrm# make
make -C /lib/modules/`uname -r`/build M=$PWD
make[1]: Entering directory '/usr/src/linux-headers-4.16.0-rc2-bone3'
CC [M] /root/tinydrm/tinydrm-helpers2.o
CC [M] /root/tinydrm/tinydrm-regmap.o
CC [M] /root/tinydrm/tinydrm-fbtft.o
CC [M] /root/tinydrm/tinydrm-ili9325.o
/root/tinydrm/tinydrm-ili9325.c:108:13: error: ‘drm_fb_cma_destroy’ undeclared here (not in a function)
.destroy = drm_fb_cma_destroy,
^~~~~~~~~~~~~~~~~~
/root/tinydrm/tinydrm-ili9325.c:109:19: error: ‘drm_fb_cma_create_handle’ undeclared here (not in a function)
.create_handle = drm_fb_cma_create_handle,
^~~~~~~~~~~~~~~~~~~~~~~~
/root/tinydrm/tinydrm-ili9325.c:350:12: error: ‘drm_fb_cma_debugfs_show’ undeclared here (not in a function)
{ "fb", drm_fb_cma_debugfs_show, 0 },
^~~~~~~~~~~~~~~~~~~~~~~
scripts/Makefile.build:316: recipe for target '/root/tinydrm/tinydrm-ili9325.o' failed
make[2]: *** [/root/tinydrm/tinydrm-ili9325.o] Error 1
Makefile:1549: recipe for target '_module_/root/tinydrm' failed
make[1]: *** [_module_/root/tinydrm] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.16.0-rc2-bone3'
Makefile:4: recipe for target 'default' failed
make: *** [default] Error 2
root@beaglebone:~/tinydrm#
root@beaglebone:~/tinydrm/tools# python ./mipi-dcs
File: /sys/kernel/debug/dri/0/command
# which ?
./tests/modetest/modetest -M "mi0283qt" -c
root@beaglebone:/opt/source/bb.org-overlays# grep -v ^# /boot/uEnv.txt
uname_r=4.16.0-rc2-bone3
enable_uboot_overlays=1
uboot_overlay_addr4=/lib/firmware/BB-SPIDEV1-00A0.dtbo
disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
disable_uboot_overlay_wireless=1
disable_uboot_overlay_adc=1
cmdline=coherent_pool=1M net.ifnames=0 quiet
root@beaglebone:/opt/source/bb.org-overlays# dmesg |grep spi
[ 20.549080] [drm] Initialized st7735r 1.0.0 20171128 for spi1.0 on minor 0
[ 21.632666] st7735r spi1.0: fb0: frame buffer device
::::::::::::::
/sys/kernel/debug/dri/0/framebuffer
::::::::::::::
framebuffer[34]:
allocated by = [fbcon]
refcount=3
format=RG16 little-endian (0x36314752)
modifier=0x0
size=160x128
layers:
size[0]=160x128
pitch[0]=320
offset[0]=0
obj[0]:
name=0
refcount=1
start=00010000
size=122880
imported=no
paddr=0x9d120000
vaddr=63dee652
::::::::::::::
/sys/kernel/debug/dri/0/state
::::::::::::::
plane[29]: plane-0
crtc=crtc-0
fb=34
allocated by = [fbcon]
refcount=3
format=RG16 little-endian (0x36314752)
modifier=0x0
size=160x128
layers:
size[0]=160x128
pitch[0]=320
offset[0]=0
obj[0]:
name=0
refcount=1
start=00010000
size=122880
imported=no
paddr=0x9d120000
vaddr=63dee652
crtc-pos=160x128+0+0
src-pos=160.000000x128.000000+0.000000+0.000000
rotation=1
crtc[30]: crtc-0
enable=1
active=1
planes_changed=1
mode_changed=0
active_changed=0
connectors_changed=0
color_mgmt_changed=0
plane_mask=1
connector_mask=1
encoder_mask=1
mode: 0:"160x128" 0 1 160 160 160 160 128 128 128 128 0x48 0x0
connector[28]: Virtual-1
crtc=crtc-0
::::::::::::::
/sys/kernel/debug/dri/0/gem_names
::::::::::::::
name size handles refcount
::::::::::::::
/sys/kernel/debug/dri/0/clients
::::::::::::::
command pid dev master a uid magic
::::::::::::::
/sys/kernel/debug/dri/0/name
::::::::::::::
st7735r dev=spi1.0 unique=spi1.0
diff --git a/src/arm/BB-SPIDEV1-00A0.dts b/src/arm/BB-SPIDEV1-00A0.dts
index e9d07a0..0780a34 100644
--- a/src/arm/BB-SPIDEV1-00A0.dts
+++ b/src/arm/BB-SPIDEV1-00A0.dts
@@ -7,6 +7,9 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+
+#include <dt-bindings/pinctrl/am33xx.h>
+
/dts-v1/;
/plugin/;
@@ -55,7 +58,7 @@
pinctrl-0 = <&bb_spi1_pins>;
ti,pio-mode; /* disable dma when used as an overlay, dma gets stuck at 160 bits... */
- channel@0 {
+ /*channel@0 {
#address-cells = <1>;
#size-cells = <0>;
@@ -74,7 +77,19 @@
reg = <1>;
spi-max-frequency = <16000000>;
- };
+ };*/
+
+ display@0{
+ status = "okay";
+ compatible = "jianda,jd-t18003-t01", "sitronix,st7735r";
+ reg = <0>;
+ spi-max-frequency = <16000000>;
+ /* https://elinux.org/Beagleboard:Cape_Expansion_Headers */
+ dc-gpios = <&gpio1 28 0>; /* dc:48 P9.15 GPIO1_16 */
+ reset-gpios = <&gpio1 16 0>; /* reset:60 P9.12 GPIO1_28 */
+ rotation = <270>;
+ };
+
};
};
tinydrm uses dumb buffers (no special GPU buffers) so it doesn't have special handling.
# Show info
modetest -M st7735r
# Show test image
modetest -M st7735r -s <connector_id>:128x160
debian@beaglebone:~/libdrm/tests/modetest$ ./modetest -M st7735r |head
Encoders:
id crtc type possible crtcs possible clones
31 30 none 0x00000001 0x00000000
Connectors:
id encoder status name size (mm) modes encoders
28 31 connected Virtual-1 35x28 1 31
modes:
name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
160x128 0 160 160 160 160 128 128 128 128 1 flags: ; type: preferred, driver
debian@beaglebone:~/libdrm/tests/modetest$ sudo ./modetest -M st7735r -s 28:160x128
setting mode 160x128-0Hz@XR24 on connectors 28, crtc 30
debian@beaglebone:~/libdrm/tests/modetest$ find |grep modetest^C
debian@beaglebone:~/libdrm/tests/modetest$ sudo ./modetest -M st7735r -s 28:160x128 -v
setting mode 160x128-0Hz@XR24 on connectors 28, crtc 30
freq: 37.50Hz
freq: 37.43Hz
For anyone interested, here is a discussion thread about using this Adafruit 1.8" TFT LCD with tinydrm on BeagleBone.
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