1.54LCD ST7789v fbtft display at kernel 5.4

[DRAgon715205]

https://www.aliexpress.com/item/3297003 ... 2970035492
I use this 1.54 lcd . work well with the driver at kernel 4.9

But when I use the lastest official raspbian os . then driver not work, so I do a dts by my self

Code: Select all

/dts-v1/;
/plugin/;

/ {
        compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";

        fragment@0 {
                target = <&spi0>;
                __overlay__ {
                        status = "okay";

                        spidev@0{
                                status = "disabled";
                        };

                        spidev@1{
                                status = "disabled";
                        };
                };
        };

        fragment@1 {
                target = <&gpio>;
                __overlay__ {
                        pitft_pins: pitft_pins {
                                brcm,pins = <22 27>;
                                brcm,function = <1 1>; /* out */
                                brcm,pull = <0>; /* none */
                        };
                };
        };

        fragment@2 {
                target = <&spi0>;
                __overlay__ {
                        /* needed to avoid dtc warning */
                        #address-cells = <1>;
                        #size-cells = <0>;

                        pitft: pitft@0{
                		compatible = "sitronix,st7789v";
                                reg = <0>;
                                pinctrl-names = "default";
                                pinctrl-0 = <&pitft_pins>;
                                spi-max-frequency = <48000000>;
                                rotate = <0>;
                                width = <240>;
                                height = <240>;
				fps = <30>;
                                buswidth = <8>;
                                reset-gpios = <&gpio 27 1>;
				dc-gpios = <&gpio 22 0>;

                                debug = <0>;
					
				init = <0x1000011
					0x20000ff
					0x1000036 0x70
					0x100003a 0x05
					0x10000b2 0x0c 0x0c 0x00 0x33 0x33
					0x10000b7 0x35
					0x10000bb 0x1a
					0x10000c0 0x2c
					0x10000c2 0x01
					0x10000c3 0x0b
					0x10000c4 0x20
					0x10000c6 0x0f
					0x10000d0 0xa4 0xa1

					0x1000021 
					0x10000e0 0x00 0x19 0x1E 0x0A 0x09 0x15 0x3D 0x44 0x51 0x12 0x03 0x00 0x3F 0x3F				
					0x10000e1 0x00 0x18 0x1E 0x0A 0x09 0x25 0x3F 0x43 0x52 0x33 0x03 0x00 0x3F 0x3F
					0x1000029>;
                        };
                };
        };


        __overrides__ {
                speed =   <&pitft>,"spi-max-frequency:0";
                rotate =  <&pitft>,"rotate:0";
                width =   <&pitft>,"width:0";
                height =  <&pitft>,"height:0";
                fps =     <&pitft>,"fps:0";
                debug =   <&pitft>,"debug:0";
        };
};

But the color not right like this


the old driver at /etc/rc.local work well

Code: Select all

sudo modprobe flexfb setaddrwin=0 buswidth=8  width=240 height=240 init=-1,0x11,-2,120,-1,0x36,0x00,-1,0x3A,0x05,-1,0xB2,0x0C,0x0C,0x00,0x33,0x33,-1,0xB7,0x35,-1,0xBB,0x1A,-1,0xC0,0x2C,-1,0xC2,0x01,-1,0xC3,0x0B,-1,0xC4,0x20,-1,0xC6,0x0F,-1,0xD0,0xA4,0xA1,-1,0x21,-1,0xE0,0x00,0x19,0x1E,0x0A,0x09,0x15,0x3D,0x44,0x51,0x12,0x03,0x00,0x3F,0x3F,-1,0xE1,0x00,0x18,0x1E,0x0A,0x09,0x25,0x3F,0x43,0x52,0x33,0x03,0x00,0x3F,0x3F,-1,0x29,-3
sudo modprobe fbtft_device debug=3 rotate=90 name=flexfb speed=48000000 gpios=reset:27,dc:22

[DRAgon715205]

why is it not different between kernel 4.9 and 5.4 with the same int code ?

[DRAgon715205]

kernel 5.4 need extra other code for st7789v >?

[6by9]

The fbtft driver has been deprecated by the mainline Linux developers. There was some API change internally to the kernel and that meant that it wasn't feasible to keep the driver going.

ST7789V has a kernel driver - https://elixir.bootlin.com/linux/latest ... -st7789v.c
Half the parameters that you're inserting into your overlay are not supported by the driver and will just be ignored. You need to follow the device tree binding defined for the driver - https://elixir.bootlin.com/linux/v5.10- ... 7789v.yaml

[6by9]

And please don't double post - viewtopic.php?f=107&t=279734

[DRAgon715205]

sorry about that,

can you give a init code work well ??/

[DRAgon715205]

see this

https://elixir.bootlin.com/linux/v5.10- ... 7789v.yaml

I not see this parameter
dc-gpios = <&gpio xx 0>;

[DRAgon715205]

I change the new int code

Code: Select all

reg = <0>;
                                pinctrl-names = "default";
                                pinctrl-0 = <&waveshare154_pins>;
                                spi-max-frequency = <48000000>;
                                rotate = <270>;
                                width = <240>;
                                height = <240>;
                                fps = <30>;
                                buswidth = <8>;

                                txbuflen = <32768>;
                                custom = <1> ;

                                reset-gpios = <&gpio 27 1>;
                                dc-gpios = <&gpio 22 0>;

                                spi-cpol;
                                spi-cpha;

                                bgr;

                                debug = <0>;

                                init = <0x1000011
                                        0x20000ff

                                        0x100003A 0x55
                                        0x10000C0 0x0C
                                        0x1000021
                                        0x1000029
                                        >;

[DRAgon715205]

change 0x10000C0 0x2C to 0x10000C0 0x0C and add bgr ;

or not change 0x10000C0 0x2C , keep it , but not add bgr ;

I get the same right color, but still have some problem. the yellow color Seems more brighter

like this

[DRAgon715205]

I try to change compatible = "sitronix,st7789v"; to compatible = "ilitek,ili9340"; the color will all go right ,
but I can not change the right Display direction

[DRAgon715205]

QAQ > ? who have any idea ? thanks

[xlla]

I am run into same issue while upgrade to kernel 5.4.
After

change 0x10000C0 0x2C to 0x10000C0 0x0C and add bgr ;

, color looks right but the white looks slight grey.

Code: Select all

rpi4:~$ modinfo fb_st7789v
filename:       /lib/modules/5.4.83-v8/kernel/drivers/staging/fbtft/fb_st7789v.ko
license:        GPL
author:         Dennis Menschel
description:    FB driver for the ST7789V LCD Controller
alias:          platform:st7789v
alias:          spi:st7789v
alias:          platform:fb_st7789v
alias:          spi:fb_st7789v
srcversion:     7E2B0FCE6212EC23E7292BE
alias:          of:N*T*Csitronix,st7789vC*
alias:          of:N*T*Csitronix,st7789v
depends:        fbtft
staging:        Y
intree:         Y
name:           fb_st7789v
vermagic:       5.4.83-v8 SMP preempt mod_unload modversions aarch64

Should I choice

drivers/gpu/drm/panel/panel-sitronix-st7789v.c

instead of

drivers/staging/fbtft/fb_st7789v.ko

?

[DRAgon715205]

@xlla

Do you solve this problem？？