On Monday 24 March 2008 15:46:43 Andy Green wrote: > The "black snow" effect after resume seems to be caused by the > memory in the glamo needing to be reset after the > "deep power down". This patch rewrites a subset of registers in > that area on resume (reinitializing them all destroys the video > output action) and removes the black snow issue. > > The "black snow" is logical corruption of the pixel data in the > glamo confirmed by locking a scope to VYSNC and looking at the > pixel data at the same offset over multiple frames, it was > changing frame by frame logically for the same offset. So it > makes sense the underlying cause of problems here is the memory > in the Glamo. > > Also, sometimes when the SD card was kicked into 16MHz speed after > resume it failed, this is also believed to be to the Glamo internal > memory which the SD peripheral also uses being in a bad state on > resume and this might also be helped.
Hey Andy, yeah this makes the device usable after a resume! My only wish would be to blank the LCM sooner and undo the blanking later :) z.
