On Sun, May 19, 2024 at 04:31:31AM -0300, Val Packett wrote:
On the RK3066, there is a bit that must be cleared on flush, otherwise we do not get display output (at least for RGB).
Signed-off-by: Val Packett val@packett.cool Cc: stable@vger.kernel.org
Hi! This was required to get display working on an old RK3066 tablet, along with the next tiny patch in the series enabling the RGB output.
I have spent quite a lot of time banging my head against the wall debugging that display (especially since at the same time a scaler chip is used for LVDS encoding), but finally adding debug prints showed that RK3066_SYS_CTRL0 ended up being reset to all-zero after being written correctly upon init. Looking at the register definitions in the vendor driver revealed that the reason was pretty self-explanatory: "dma_stop".
What commit id does this fix?
thanks,
greg k-h