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Assume a default RGB subpixel order and flip it around if 180° rotation is configured via address mode. Report subpixel order to userspace. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://lore.kernel.org/r/20240626-drm-panel-ili9881c-rotation-v1-2-e0ff54173e32@pengutronix.de Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240626-drm-panel-ili9881c-rotation-v1-2-e0ff54173e32@pengutronix.de