BBB AM3358 Framebuffer Driver Problem

hoyoun lyu

Intellectual 420 points

Hi.

I use Beaglebone Black.

I work in ti-processor-sdk-linux-am335x-evm-01.00.00.03.

File System : arago-base-tisdk-image-am335x-evm

I want to use only Framebuffer. Not hdmi.

But not exist framebuffer driver.

> cat /proc/fb --> Only 0

> fbset -t 167515 20 10 2 4 10 2 ---> Timings 0 0 0 0 0 0 0

After Power-On, LCD Sync Signal (VSync, HSync, PClk, DE) is not Out.

What is Framebuffer Driver Name ?

How install Framebuffer Driver ?

Please, Help !

root@am335x-evm:~# dmesg | grep drm

[ 1.066119] [drm] Initialized drm 1.1.0 20060810
[ 1.729744] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.736414] [drm] No driver support for vblank timestamp query.
[ 1.749945] [drm] Cannot find any crtc or sizes - going 1024x768
[ 1.791856] [drm] Initialized tilcdc 1.0.0 20121205 on minor 0

Exist drm driver for framebuffer.

How use to drm driver ?

over 9 years ago

0 Yordan Kovachev over 9 years ago

TI__Guru**** 161600 points

Hi,

See the following guides:
processors.wiki.ti.com/.../Linux_Core_LCD_Controller_User_Guide
processors.wiki.ti.com/.../Processor_SDK_Linux_LCDC

They contain the available information on how to port/use FB or DRM and how to switch from one to the other in linux kernel.

Best Regards,
Yordan

0 hoyoun lyu over 9 years ago in reply to Yordan Kovachev

Intellectual 420 points

Hi, Yordan.
Thanks reply.

I already confirmed your recommend document.
But I don't understand.

I want directly use Framebuffer mmap() in console mode. Not X-Mode.
Useful drm driver ?

fbset command error ?
root@am335x-evm:~# fbset -t 167515 20 10 2 4 10 2 --> LCD Driver Chip Data
ioctl FBIOPUT_VSCREENINFO: Invalid argument

Timings 0 0 0 0 0 0 0 ?
LCD Sync Signal not Out. ?

How connect between /dev/fb and drm driver ?
cat /proc/fb
0 ?

I don't understand.
Help !

I modified am335x-boneblack.dts.

/*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;

#include "am33xx.dtsi"
#include "am335x-bone-common.dtsi"

&ldo3_reg {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
};

&mmc1 {
vmmc-supply = <&vmmcsd_fixed>;
};

&mmc2 {
vmmc-supply = <&vmmcsd_fixed>;
pinctrl-names = "default";
pinctrl-0 = <&emmc_pins>;
bus-width = <8>;
status = "okay";
ti,vcc-aux-disable-is-sleep;
};

&am33xx_pinmux {

spi1_pins: spi1_pins {
pinctrl-single,pins = <
0x190 ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (A13) mcasp0_aclkx.spi1_sclk */
0x194 ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (B13) mcasp0_fsx.spi1_d0 */
0x198 ( PIN_OUTPUT_PULLUP | MUX_MODE3 ) /* (D12) mcasp0_axr0.spi1_d1 */
0x16c ( PIN_INPUT_PULLUP | MUX_MODE5 ) /* (E17) uart0_rtsn.spi1_cs0 */
0x17c ( PIN_INPUT_PULLUP | MUX_MODE4 ) /* (D17) xdma_event_intr0.spi1_cs1 */
>;
};

lcd_pins_default: lcd_pins_default {
pinctrl-single,pins = <
0xa0 ( PIN_OUTPUT | MUX_MODE0 ) /* (R1) lcd_data0.lcd_data0 */
0xa4 ( PIN_OUTPUT | MUX_MODE0 ) /* (R2) lcd_data1.lcd_data1 */
0xa8 ( PIN_OUTPUT | MUX_MODE0 ) /* (R3) lcd_data2.lcd_data2 */
0xac ( PIN_OUTPUT | MUX_MODE0 ) /* (R4) lcd_data3.lcd_data3 */
0xb0 ( PIN_OUTPUT | MUX_MODE0 ) /* (T1) lcd_data4.lcd_data4 */
0xb4 ( PIN_OUTPUT | MUX_MODE0 ) /* (T2) lcd_data5.lcd_data5 */
0xb8 ( PIN_OUTPUT | MUX_MODE0 ) /* (T3) lcd_data6.lcd_data6 */
0xbc ( PIN_OUTPUT | MUX_MODE0 ) /* (T4) lcd_data7.lcd_data7 */
0xc0 ( PIN_OUTPUT | MUX_MODE0 ) /* (U1) lcd_data8.lcd_data8 */
0xc4 ( PIN_OUTPUT | MUX_MODE0 ) /* (U2) lcd_data9.lcd_data9 */
0xc8 ( PIN_OUTPUT | MUX_MODE0 ) /* (U3) lcd_data10.lcd_data10 */
0xcc ( PIN_OUTPUT | MUX_MODE0 ) /* (U4) lcd_data11.lcd_data11 */
0xd0 ( PIN_OUTPUT | MUX_MODE0 ) /* (V2) lcd_data12.lcd_data12 */
0xd4 ( PIN_OUTPUT | MUX_MODE0 ) /* (V3) lcd_data13.lcd_data13 */
0xd8 ( PIN_OUTPUT | MUX_MODE0 ) /* (V4) lcd_data14.lcd_data14 */
0xdc ( PIN_OUTPUT | MUX_MODE0 ) /* (T5) lcd_data15.lcd_data15 */
0xe0 ( PIN_OUTPUT | MUX_MODE0 ) /* (U5) lcd_vsync.lcd_vsync */
0xe4 ( PIN_OUTPUT | MUX_MODE0 ) /* (R5) lcd_hsync.lcd_hsync */
0xe8 ( PIN_OUTPUT | MUX_MODE0 ) /* (V5) lcd_pclk.lcd_pclk */
0xec ( PIN_OUTPUT | MUX_MODE0 ) /* (R6) lcd_ac_bias_en.lcd_ac_bias_en */
>;
};

// nxp_hdmi_bonelt_pins: nxp_hdmi_bonelt_pins {
// pinctrl-single,pins = <
// 0x1b0 0x03 /* xdma_event_intr0, OMAP_MUX_MODE3 | AM33XX_PIN_OUTPUT */
// 0xa0 0x08 /* lcd_data0.lcd_data0, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xa4 0x08 /* lcd_data1.lcd_data1, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xa8 0x08 /* lcd_data2.lcd_data2, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xac 0x08 /* lcd_data3.lcd_data3, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xb0 0x08 /* lcd_data4.lcd_data4, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xb4 0x08 /* lcd_data5.lcd_data5, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xb8 0x08 /* lcd_data6.lcd_data6, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xbc 0x08 /* lcd_data7.lcd_data7, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xc0 0x08 /* lcd_data8.lcd_data8, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xc4 0x08 /* lcd_data9.lcd_data9, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xc8 0x08 /* lcd_data10.lcd_data10, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xcc 0x08 /* lcd_data11.lcd_data11, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xd0 0x08 /* lcd_data12.lcd_data12, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xd4 0x08 /* lcd_data13.lcd_data13, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xd8 0x08 /* lcd_data14.lcd_data14, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xdc 0x08 /* lcd_data15.lcd_data15, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT | AM33XX_PULL_DISA */
// 0xe0 0x00 /* lcd_vsync.lcd_vsync, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT */
// 0xe4 0x00 /* lcd_hsync.lcd_hsync, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT */
// 0xe8 0x00 /* lcd_pclk.lcd_pclk, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT */
// 0xec 0x00 /* lcd_ac_bias_en.lcd_ac_bias_en, OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT */
// >;
// };
// nxp_hdmi_bonelt_off_pins: nxp_hdmi_bonelt_off_pins {
// pinctrl-single,pins = <
// 0x1b0 0x03 /* xdma_event_intr0, OMAP_MUX_MODE3 | AM33XX_PIN_OUTPUT */
// >;
// };
//
// mcasp0_pins: mcasp0_pins {
// pinctrl-single,pins = <
// 0x1ac (PIN_INPUT_PULLUP | MUX_MODE0) /* mcasp0_ahclkx.mcasp0_ahclkx */
// 0x19c (PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* mcasp0_ahclkr.mcasp0_axr2 */
// 0x194 (PIN_OUTPUT_PULLUP | MUX_MODE0) /* mcasp0_fsx.mcasp0_fsx */
// 0x190 (PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mcasp0_aclkx.mcasp0_aclkx */
// 0x06c (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* gpmc_a11.GPIO1_27 */
// >;
// };
//
// mcasp0_pins_sleep: mcasp0_pins_sleep {
// pinctrl-single,pins = <
// 0x1ac (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_ahclkx.mcasp0_ahclkx */
// 0x19c (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_ahclkr.mcasp0_axr2 */
// 0x194 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_fsx.mcasp0_fsx */
// 0x190 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_aclkx.mcasp0_aclkx */
// 0x06c (PIN_INPUT_PULLDOWN | MUX_MODE7) /* gpmc_a11.GPIO1_27 */
// >;
// };
};

&spi1 {
pinctrl-names = "default";
pinctrl-0 = <&spi1_pins>;

status = "okay";
spidev@0 {
compatible = "linux,spidev";
spi-max-frequency = <24000000>; /* TODO */
reg = <0>;
};
spidev@1 {
compatible = "linux,spidev";
spi-max-frequency = <24000000>; /* TODO */
reg = <1>;
};
};

&lcdc {
status = "okay";
};

//&mcasp0 {
// pinctrl-names = "default", "sleep";
// pinctrl-0 = <&mcasp0_pins>;
// pinctrl-1 = <&mcasp0_pins_sleep>;
// status = "okay";
// op-mode = <0>; /* MCASP_IIS_MODE */
// tdm-slots = <2>;
// serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
// 0 0 1 0
// >;
// tx-num-evt = <1>;
// rx-num-evt = <1>;
//};

/ {
panel {
compatible = "ti,tilcdc,panel";
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&lcd_pins_default>;

panel-info {
ac-bias = <255>;
ac-bias-intrpt = <0>;
dma-burst-sz = <16>;
bpp = <16>;
fdd = <0x80>;
sync-edge = <0>;
sync-ctrl = <1>;
raster-order = <0>;
fifo-th = <0>;
};

display-timings {
native-mode = <&timing0>;
timing0: 240x320p60 {
clock-frequency = <6000000>;
hactive = <240>;
vactive = <320>;
hfront-porch = <10>;
hback-porch = <20>;
hsync-len = <10>;
vback-porch = <2>;
vfront-porch = <4>;
vsync-len = <2>;
hsync-active = <1>;
vsync-active = <1>;
};
};
};

hdmi {
//compatible = "ti,tilcdc,slave";
//i2c = <&i2c0>;
//pinctrl-names = "default", "off";
//pinctrl-0 = <&nxp_hdmi_bonelt_pins>;
//pinctrl-1 = <&nxp_hdmi_bonelt_off_pins>;
status = "disabled";
};

// clk_mcasp0_fixed: clk_mcasp0_fixed {
// #clock-cells = <0>;
// compatible = "fixed-clock";
// clock-frequency = <24576000>;
// };
//
// clk_mcasp0: clk_mcasp0 {
// #clock-cells = <0>;
// compatible = "ti,gpio-gate-clock";
// clocks = <&clk_mcasp0_fixed>;
// enable-gpios = <&gpio1 27 0>; /* BeagleBone Black Clk enable on GPIO1_27 */
// };
//
// hdmi_audio: hdmi_audio@0 {
// compatible = "linux,hdmi-audio";
// status = "okay";
// };
//
// sound {
// compatible = "ti,beaglebone-black-audio";
// ti,model = "TI BeagleBone Black";
// ti,audio-codec = <&hdmi_audio>;
// ti,mcasp-controller = <&mcasp0>;
// ti,audio-routing =
// "HDMI Out", "TX";
// clocks = <&clk_mcasp0>;
// clock-names = "mclk";
// };
};

Please, Confirm !

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BBB AM3358 Framebuffer Driver Problem