drm/panel: Enable DSI transactions on the RPi panel.
It turns out that I had just mistaken what type of write the register
writes were supposed to be, using DCS instead of generic long writes.
Switching to transactions instead of using the atmel as a bridge also
seems to resolve the sparkling pixels problem I've had.
Signed-off-by: Eric Anholt <[email protected]>
Fixes: 2f733d6194bd ("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.")
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Boris Brezillon <[email protected]>
Acked-by: Thierry Reding <[email protected]>