From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-yk0-x22b.google.com ([2607:f8b0:4002:c07::22b]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WznXH-00063G-0g for barebox@lists.infradead.org; Wed, 25 Jun 2014 13:46:52 +0000 Received: by mail-yk0-f171.google.com with SMTP id 200so1091395ykr.16 for ; Wed, 25 Jun 2014 06:46:28 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20140623165754.GA27898@pengutronix.de> References: <20140618195849.GL15686@pengutronix.de> <20140623074308.GU15686@pengutronix.de> <20140623165754.GA27898@pengutronix.de> Date: Wed, 25 Jun 2014 15:46:28 +0200 Message-ID: From: Holger Schurig List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: i.MX6 frame buffer inside barebox? To: Robert Schwebel Cc: "barebox@lists.infradead.org" I just noticed that simplefb wouldn't work with i.MX6 anyway, even if I adapt it. When I setup the framebuffer from barebox and display a splash and then boot into Linux, then my framebuffer vanishes. Even when I don't have simplefb or ipu enabled. I think (!) the reason is the clock framework.The clocks for the IPU are turned off, and so I don't see anything anymore (this is, however, a wild assumption, I haven't checked it yet). However, I checked with an Oscillioscope that if I setup the backlight PWM (pwm0 in Barebox) and start Linux without CONFIG_PWM / CONFIG_PWM_IMX, then the PWM is turned off as soon as Linux has been started. Memory 0x2080000 shows in bit 0 that the PWM is still turned on. But as nothing comes out, it must be the clock. _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox