I'm trying to transition existing code written under SDK v6.0 to the new Processor SDK v1.0.
I have as custom board cloning the original beaglebone with an Ortus resistive touch LCD.
These are the changes that I made to the original code to get the framebuffer device and the LCD panel to work correctly.
Changes to board-am335xevm.c
static struct lcd_ctrl_config lcd_cfg_16 = {
&disp_panel_16,
.ac_bias = 255,
.ac_bias_intrpt = 0,
.dma_burst_sz = 16,
.bpp = 16,
.fdd = 0x80,
.tft_alt_mode = 0,
.stn_565_mode = 0,
.mono_8bit_mode = 0,
.invert_line_clock = 1,
.invert_frm_clock = 1,
.sync_edge = 0,
.sync_ctrl = 1,
.raster_order = 0,
};
struct da8xx_lcdc_platform_data Ortus_COM35T3M09XTC_pdata = {
.manu_name = "Ortustech",
.controller_data = &lcd_cfg_16,
.type = "Ortus_COM35T3M09XTC",
};
/* Custom board based on Beaglebone Rev A3 and after*/
static struct evm_dev_cfg beaglebone_dev_cfg[] = {
{am335x_rtc_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{clkout2_enable, DEV_ON_BASEBOARD, PROFILE_NONE},
{tps65217_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{mii1_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{lcdc_16_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{mfd_tscadc_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{usb0_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{usb1_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{mmc1_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{mmc0_no_cd_init, DEV_ON_BASEBOARD, PROFILE_NONE},
{NULL, 0, 0},
};
Addition to video driver da8xx-fb.c
static struct da8xx_panel known_lcd_panels[] = {
...
/* Ortustech COM35T3M09XTC */
[3] = {
.name = "Ortus_COM35T3M09XTC",
.width = 240,
.height = 320,
.hfp = 44,
.hbp = 1,
.hsw = 2,
.vfp = 3,
.vbp = 1,
.vsw = 2,
.pxl_clk = 5600000,
.invert_pxl_clk = 0,
},
...
};
Addition to modedb.c
/* 240x320 @ 60 Hz, 5.6 kHz hsync, 3:4 aspect ratio */
{ NULL, 60, 240, 320, 56000, 44, 2, 3, 2, 1, 48, 1, 0,
FB_VMODE_DOUBLE },
I am having no success getting the fb0 device to create itself in the new DRM .dts framework.
I've added the following to the am335x-bone-common.dtsi file:
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 {
240x320p60 {
hactive = <240>;
vactive = <320>;
hback-porch = <1>;
hfront-porch = <44>;
hsync-len = <2>;
vback-porch = <1>;
vfront-porch = <3>;
vsync-len = <2>;
clock-frequency = <5600000>;
hsync-active = <0>;
vsync-active = <0>;
};
};
tscadc {
compatible = "ti-tscadc-dt";
ti,hwmods = "adc_tsc";
tsc-wires = <4>;
tsc-x-plate-resistance = <200>;
tsc-steps = <5>;
adc-channels = <4>;
};
lcd_pins_default: lcd_pins_default {
pinctrl-single,pins = <
0x20 0x01 /* gpmc_ad8.lcd_data16, OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT */
0x24 0x01 /* gpmc_ad9.lcd_data17, OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT */
0x28 0x01 /* gpmc_ad10.lcd_data18, OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT */
0x2c 0x01 /* gpmc_ad11.lcd_data19, OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT */
0x30 0x01 /* gpmc_ad12.lcd_data20, OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT */
0x34 0x01 /* gpmc_ad13.lcd_data21, OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT */
0x38 0x01 /* gpmc_ad14.lcd_data22, OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT */
0x3c 0x01 /* gpmc_ad15.lcd_data23, OMAP_MUX_MODE1 | 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 */
>;
};
However, during kernel startup, I see
[1.582480] [drm] Initialized drm 1.1.0 20060810
but I see no other acknowledgement of the LCD device.
When I start executing my processes I immediately see
INIT: version 2.88 booting
Error opening /dev/fb0: No such file or directory.
I'm looking for advice in changes to the .dts file and/or the singlecore-omap2plus-defconfig file to get my framebuffer recognized.
Any suggestions or help would be appreciated.
David
