Dear Maxime Ripard, > Hi Marek, > > Le 22/04/2013 11:16, Marek Vasut a écrit : > > Dear Maxime Ripard, > > > >> The current code always registers as a 32 bits display, and uses the > >> hardware to drop the MSB of each color to abjust to the interface width > >> used by the panel. > >> > >> This results on 18 bits (and probably 16 bits display as well) in colors > >> being displayed poorly, because the MSB are obviously the most important > >> bits for each color definition. > >> > >> The default controller behaviour when using an interface width smaller > >> than the color depth is to drop the LSBs of each color, which makes more > >> sense because you lose the least important part of the color definition. > >> > >> So, to fix the colors display, just get back to the default controller > >> behaviour. > >> > >> Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> > > > > Did you receive my latest email? Check M28EVK (imx28-m28evk.dts), it uses > > 18bit LCD and works without this patch I think. > > Thanks for the pointer. You mentionned in your other mail that it was > wired on 24bits but that the screen is actually 18 bits. I went to > search for the schematics to look at the wirings to see what could > differ, but I couldn't find any for the M28EVK. Are they publicly > available? Yes, [1] page 6 . [1] http://www.denx-cs.de/doku/sites/default/files/M28EVK_V20_0.pdf Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
