drm/i915/dsi: Read/write proper brightness value via MIPI DCS command

Driver has to swap the endian before send brightness level value
to tcon.

v2: Use __be16 instead of u16 to fix sparse warning.
v3: Send one or two bytes brightness value depend on the precision.
v4: get data length of brightness value more easily.

Reported-by: kernel test robot <[email protected]>
Cc: Ville Syrjala <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Vandita Kulkarni <[email protected]>
Cc: Cooper Chiou <[email protected]>
Cc: William Tseng <[email protected]>
Signed-off-by: Lee Shawn C <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
Signed-off-by: Vandita Kulkarni <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions