Hi all.
The display does not output normally.
1. This is the screen of the problem.
2. This is a screen that should come out normally.
Therefore, it is necessary to review whether the settings are correct in the bootloader and the kernel.
Below are the system information and tasks.
- Hardware system
Module: Apalis iMX6, Ixora Carrier Board v1.1
LVDS 2 port : LA123WF4-SL05, 12.3”WU (1920 X RGB X 720) TFT- LCD
- Operation system
boot2qt : Boot to Qt for Embedded Linux 2.3.4
bootloader: U-Boot 2016.11-dirty
kernel : Linux version 4.1.44-2.7.5+g18717e2
- LCD timing
- Device Tree of kernel, arch/arm/boot/dts/imx6qdl-apalis.dtsi
mxcfb1: fb@0 {
compatible = "fsl,mxc_sdc_fb";
disp_dev = "ldb";
interface_pix_fmt = "RGB24";
default_bpp = <24>;
int_clk = <0>;
late_init = <0>;
status = "disabled"; // "okey" in arch/arm/boot/dts/imx6qdl-apalis-ixora-v1.1.dtsi
};
&ldb {
status = "okay";
split-mode;
// dual-mode;
lvds-channel@0 {
reg = <0>;
fsl,data-mapping = "spwg"; /* "jeida"; */
fsl,data-width = <24>;
crtc = "ipu2-di1";
primary;
status = "okay";
display-timings {
native-mode = <&timing01>;
timing01: 1920x720 {
clock-frequency = <89400000>;
hactive = <1920>;
vactive = <720>;
hback-porch = <96>;
hfront-porch = <30>;
vback-porch = <3>;
vfront-porch = <3>;
hsync-len = <2>;
vsync-len = <2>;
};
};
};
lvds-channel@1 {
reg = <1>;
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
crtc = "ipu1-di0";
status = "okay";
display-timings {
timing02: 1920x720 {
clock-frequency = <89400000>;
hactive = <1920>;
vactive = <720>;
hback-porch = <96>;
hfront-porch = <30>;
vback-porch = <3>;
vfront-porch = <3>;
hsync-len = <2>;
vsync-len = <2>;
};
};
};
};
- u-boot env
vidargs=video=mxcfb0:dev=ldb,1920x720@60,if=RGB24, video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off
- kernel log
:
[ 0.244330] MIPI DSI driver module loaded
[ 0.244682] ldb 2000000.aips-bus:ldb@020e0008: split mode
[ 0.244951] ldb 2000000.aips-bus:ldb@020e0008: split mode or dual mode, ignoring second output
[ 0.245615] 20e0000.hdmi_video supply HDMI not found, using dummy regulator
[ 0.247074] mxc_sdc_fb fb@0: registered mxc display driver ldb
[ 0.262134] mxc_sdc_fb fb@0: 1920x720 h_sync,r,l: 2,30,96 v_sync,l,u: 2,3,3 pixclock=89405000 Hz
[ 0.272800] imx-ipuv3 2800000.ipu: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)
[ 0.306740] mxc_sdc_fb fb@0: 1920x720 h_sync,r,l: 2,30,96 v_sync,l,u: 2,3,3 pixclock=89405000 Hz
[ 0.354510] Console: switching to colour frame buffer device 240x45
[ 0.389237] mxc_sdc_fb fb@1: mxcfb1 is turned off!
[ 0.389484] mxc_sdc_fb fb@2: mxcfb2 is turned off!
[ 0.389720] mxc_sdc_fb fb@3: mxcfb3 is turned off!
:
- Run fbset of target
root@b2qt-apalis-imx6:~# fbset
mode "1920x720-60"
# D: 89.405 MHz, H: 43.655 kHz, V: 59.966 Hz
geometry 1920 720 1920 1440 24
timings 11185 96 30 3 3 2 2
accel false
rgba 8/16,8/8,8/0,0/0
endmode
Is there anything else to check?
Thanks.
Hi.
There was a problem with the pinmap.
Now the screen comes out, but two screens are displayed instead of one screen.
1.set to split-mode
1) Timing
clock-frequency = <89400000>;
hactive = <1920>;
vactive = <720>;
hback-porch = <96>;
hfront-porch = <30>;
vback-porch = <3>;
vfront-porch = <3>;
hsync-len = <2>;
vsync-len = <2>;
=> Two screens, pushed to the right.
2) Timing
clock-frequency = <44700000>;
hactive = <1920>;
vactive = <720>;
hback-porch = <48>;
hfront-porch = <15>;
vback-porch = <3>;
vfront-porch = <3>;
hsync-len = <1>;
vsync-len = <2>;
3) If both of them operate in a single mode, the screen will not come out.
4) Data mapping was done with "spwg". (If you use "jeida", the colors are strange.)
I have to come out on one screen. Can you help me with setting up?
Thank you.