Thanks John, That's what I realized this morning when looking back at the code.
But I wasn't aware of the need to copy the dts file to the sdcard. Will give it a try later when back home. Regards Cédric Malitte > Le 2014-08-02 à 15:21, John Syn <[email protected]> a écrit : > > > 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 shouldn’t 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 a topic in the Google > Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/wAcTyHqLfwg/unsubscribe. > To unsubscribe from this group and all its topics, 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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