From: Cedric Malitte <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Friday, August 1, 2014 at 11:50 PM To: "[email protected]" <[email protected]> Subject: [beagleboard] Enable LCD4 adding .dts to Kernel source v3.1x ?
> Hi, > > I compiled the 3.13 and 3.15 kernel using Robert tools, and I saw this hoping > to get LCD4 cape support: > http://www.spinics.net/lists/linux-omap/msg109735.html > > I applied the patch against the kernel tree, but nothing happened at boot > after a rebuild, I mean screen stayed black. > > A quick look in the kernel tree dirs and the am335x-bone-display-cape.dts has > not been compiled. > So I tried to ass it to Makefile, rebuild and got a fatal error from DTC. It shouldn¹t be compiled. Looking at the link you provided, the patch is included in the am335x-boneblack.dts file so when this DT gets compiled, it will have support for your LCD. Make sure you copy the new am335x-boneblack.dts to your dtbs folder on your SDCard. Regards, John > > I'm not very used to DT, so if someone could have a look at this file and tell > me what can be wrong, I'll try to rebuild it. > >> /* >> * Copyright (C) 2014 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. >> * >> * This DTS adds supports for display capes using LCD interface for display >> * and GPIO or PWM interface for backlight controls. >> */ >> &am33xx_pinmux { >> bbcape_backlight_pins: bbcape_backlight_pins { >> pinctrl-single,pins = < >> 0x48 (PIN_OUTPUT | MUX_MODE7) /* gpmc_a[2].GPIO1[18] (backlight control) */ >>> >; >> }; >> bbcape_lcd_pins: bbcape_lcd_pins { >> pinctrl-single,pins = < >> 0xa0 (PIN_OUTPUT | MUX_MODE0) /* lcd_data0.lcd_data0 */ >> 0xa4 (PIN_OUTPUT | MUX_MODE0) /* lcd_data1.lcd_data1 */ >> 0xa8 (PIN_OUTPUT | MUX_MODE0) /* lcd_data2.lcd_data2 */ >> 0xac (PIN_OUTPUT | MUX_MODE0) /* lcd_data3.lcd_data3 */ >> 0xb0 (PIN_OUTPUT | MUX_MODE0) /* lcd_data4.lcd_data4 */ >> 0xb4 (PIN_OUTPUT | MUX_MODE0) /* lcd_data5.lcd_data5 */ >> 0xb8 (PIN_OUTPUT | MUX_MODE0) /* lcd_data6.lcd_data6 */ >> 0xbc (PIN_OUTPUT | MUX_MODE0) /* lcd_data7.lcd_data7 */ >> 0xc0 (PIN_OUTPUT | MUX_MODE0) /* lcd_data8.lcd_data8 */ >> 0xc4 (PIN_OUTPUT | MUX_MODE0) /* lcd_data9.lcd_data9 */ >> 0xc8 (PIN_OUTPUT | MUX_MODE0) /* lcd_data10.lcd_data10 */ >> 0xcc (PIN_OUTPUT | MUX_MODE0) /* lcd_data11.lcd_data11 */ >> 0xd0 (PIN_OUTPUT | MUX_MODE0) /* lcd_data12.lcd_data12 */ >> 0xd4 (PIN_OUTPUT | MUX_MODE0) /* lcd_data13.lcd_data13 */ >> 0xd8 (PIN_OUTPUT | MUX_MODE0) /* lcd_data14.lcd_data14 */ >> 0xdc (PIN_OUTPUT | MUX_MODE0) /* lcd_data15.lcd_data15 */ >> 0xe0 (PIN_OUTPUT | MUX_MODE0) /* lcd_vsync.lcd_vsync */ >> 0xe4 (PIN_OUTPUT | MUX_MODE0) /* lcd_hsync.lcd_hsync */ >> 0xe8 (PIN_OUTPUT | MUX_MODE0) /* lcd_pclk.lcd_pclk */ >> 0xec (PIN_OUTPUT | MUX_MODE0) /* lcd_ac_bias_en.lcd_ac_bias_en (lcd_en) */ >> 0x1a4 (PIN_OUTPUT_PULLUP | MUX_MODE7) /* mcasp0_fsr.gpio3[19] (lcd_disen) */ >>> >; >> }; >> bbcape_touchscreen_pins: bbcape_touchscreen_pins { >> pinctrl-single,pins = < >> 0x184 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* uart1_txd.gpio0[15] (enter) */ >> 0x40 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* gpmc_a0.gpio1[16] (left) */ >> 0x44 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* gpmc_a1.gpio1[17] (right) */ >> 0x4c (PIN_INPUT_PULLDOWN | MUX_MODE7) /* gpmc_a3.gpio1[19] (up) */ >> 0x198 (PIN_INPUT_PULLDOWN | MUX_MODE7) /* mcasp0_axr0.gpio3[16] (down) */ >>> >; >> }; >> }; >> >> / { >> backlight { >> status = "okay"; >> compatible = "gpio-backlight"; >> pinctrl-names = "default"; >> pinctrl-0 = <&bbcape_backlight_pins>; >> gpios = <&gpio1 18 GPIO_ACTIVE_HIGH>; >> default-on; >> }; >> panel { >> status = "okay"; >> compatible = "ti,tilcdc,panel"; >> pinctrl-names = "default"; >> pinctrl-0 = <&bbcape_lcd_pins>; >> 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>; >> /* www.newhavendisplay.com/app_notes/OTA5180A.pdf */ >> timing0: 480x272 { >> clock-frequency = <9200000>; >> hactive = <480>; >> vactive = <272>; >> hfront-porch = <8>; >> hback-porch = <47>; >> hsync-len = <41>; >> vback-porch = <2>; >> vfront-porch = <3>; >> vsync-len = <10>; >> hsync-active = <0>; >> vsync-active = <0>; >> de-active = <1>; >> pixelclk-active = <0>; >> }; >> }; >> }; >> }; > > Thanks > > Cedric. > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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