From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from qmail.e-mind.com ([188.94.192.40]) by bombadil.infradead.org with smtp (Exim 4.87 #1 (Red Hat Linux)) id 1cbprd-000787-HA for barebox@lists.infradead.org; Thu, 09 Feb 2017 14:38:28 +0000 From: gianluca Message-ID: <3a707429-03a7-db6b-a1b1-1e70ec0b929e@eurekelettronica.it> Date: Thu, 9 Feb 2017 15:37:41 +0100 MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Using LVDS in a iMX6Q/D from Barebox To: barebox@lists.infradead.org Hello, I would like to know if there is a clear way on using the lvds pins to drive a LVDS display in a custom made board, based on iMX6Q (in the near future the iMX6Dual). Actually it boots using Barebox 2017.01 and if there is a HDMI display it uses without hassle. My init scripts are loading a splash screen, then boot into linux: > echo "Load splash.png from filesystem..." > splash -f /dev/fb0 -b 0 $bootconfig_path/splash.png > fb0.enable=1 But now, we are looking for a clear way to activate the LVDS signals in the LCD Controller when an eeprom chip is found in the I2C bus (more or less like EDID stuff) during bootup. In my bootup script (or specific board initcall code [board.c]) if no EEPROM is found, then it will boot naturally with the HDMI port LCD Display (if any) or completely BLIND board if no lcd is present. If it easy to activate the i2c bus and check for some chip addresses, I do not know on how to activate the lvds within code. In my iMX28 based board, I was used the: > add_generic_device("stmfb", 0, NULL, IMX_FB_BASE, 0x2000, > IORESOURCE_MEM, &board_fb_pdata); system call to activate a specific videomode defined in the board_fb_data. Which is the correct way to enable LVDS stuff? Maybe in the device tree stuff? Best regards for any example or any help, hint or clue you will give me -- Eurek s.r.l. | Electronic Engineering | http://www.eurek.it via Celletta 8/B, 40026 Imola, Italy | Phone: +39-(0)542-609120 p.iva 00690621206 - c.f. 04020030377 | Fax: +39-(0)542-609212 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox