On Wednesday 24 July 2013 01:23 PM, Russell King - ARM Linux wrote: > On Wed, Jul 24, 2013 at 11:40:33AM -0400, Santosh Shilimkar wrote: >> On Wednesday 24 July 2013 10:52 AM, Russell King - ARM Linux wrote: >>> I also continue to be disappointed by the lack of things working on the >>> 4430 - it's been a number of years now and _still_ the on-board LCDs do >>> not work. People have tried to blame that on hardware faults and the >>> like, but they're just being idiotic when they say stuff like that. It >>> can't be hardware faults when the kernel supplied with the board is able >>> to make them work to the extent that userspace can play back video on all >>> three output devices simultaneously, without hiccup or any imperfection. >>> I don't know whether it's just that the backlight support isn't working >>> or what - because any information on the 4430 seems to be a tightly >>> controlled secret that only a few select people are permitted to know >>> about. As far as I'm concerned, much of the hardware is a black box to >>> me. >>> >> On the display related issues, Tomi and Archit have been sorting out >> issue but am not sure about the current state. If the pre-built binaries >> video playback works means your hardware seems to be fine. > > Just let me be absolutely crystal clear about this: the on-board LCDs > have _never_ worked with a mainline kernel, but they did work with the > kernel which originally came with the board with the original 4430 SoC. > I can right now put the original 4430 SoC back on the board and boot > using the kernel which is still on the SD card and they will work. > > Even with the original 4430 SoC and mainline kernels, they have never > worked. > > I tried it back and forth several times, but even with this, the > explanation was always "your hardware must be faulty". And then the wrong > voltage levels was found which was preventing the LCD modules from even > being recognised... but still, no sign of life on the LCD panels. > > It may be that there's some error in the kernel configuration I'm building. > I don't know, because I have _no_ idea what hardware is involved in > bringing the LCDs online. Like I said above, the 4430SDP board is just > a black box. I am totally reliant on others telling me what the right > config options are supposed to be and fixing problems when things don't > work. > > With the lack of information on this board, all I can do when things don't > work is whinge and moan at people. I am powerless to debug the problems > myself, even if they're a simple misconfiguration. > > Is there information available on the 4430SDP? Is there any reason I > can't have access to it? > I haven't come across the information which is available on the web. Let me check if there are schematics which i can send across to you. Regards, Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
