From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Date: Wed, 13 Jun 2012 17:09:08 -0600 Subject: [U-Boot] [PATCH v2 0/19] tegra: Add display driver and LCD support for Seaboard In-Reply-To: <4FD91C2B.4010408@wwwdotorg.org> References: <1339604395-6621-1-git-send-email-sjg@chromium.org> <4FD91AEA.6040400@wwwdotorg.org> <4FD91C2B.4010408@wwwdotorg.org> Message-ID: <4FD91D94.4040604@wwwdotorg.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 06/13/2012 05:03 PM, Stephen Warren wrote: > On 06/13/2012 04:57 PM, Stephen Warren wrote: >> On 06/13/2012 10:19 AM, Simon Glass wrote: >>> This series adds support for the Tegra2x's display peripheral. This >>> supports the LCD display on Seaboard and we use this to enable console >>> output in U-Boot on the LCD. >> >> Simon, >> >> This series doesn't apply to u-boot-tegra/master cleanly; there are a >> couple trivial conflicts in arch/arm/cpu/armv7/tegra2/Makefile to >> resolve, but I had to apply the final patch completely by hand. >> >> When I run the resultant binary, I see the LCD backlight turn on, but >> the image on the LCD is wrong; it starts completely black without any >> text showing, then slowly fills in to white/gray with many horizontal >> and vertical black lines; I guess the LCD timing is incorrect - are >> there multiple different LCD models? Note that I am using a real >> Seaboard not a Springbank for this test. > > Oh, false alarm on this second point - the LCD is screwed up after using > nvflash to flash the device, but when power-cycling it rather than just > resetting it, the LCD works fine. I guess this means the driver is not > initializing something that nvflash changed, and relying on a power-on > default. I suppose it might not be worth fixing that given it works from > cold power on. Oops, there is a problem - executing "reset" in U-Boot, or "reboot" from the kernel (one without any display support at least; mainline Linux) will get into the "bad LCD" state too. So, I guess there is something that needs to be fixed. Sorry for the back-to-back emails.