Extern or forward variable declaration at include/drm/tinydrm/mipi-dbi.h, line 17 References: drivers/gpu/drm/tinydrm/hx8357d.c, line 225 drivers/gpu/drm/tinydrm/ili9225.c, line 382 drivers/gpu/drm/tinydrm/ili9341.c, line 181 drivers/gpu/drm/tinydrm/mi0283qt.c, line 186 drivers/gpu/drm/tinydrm/mipi-dbi.c, line 972 drivers/gpu/drm/tinydrm/st7586.c, line 329 drivers/gpu/drm/tinydrm/st7735r.c, line 156 include/drm/tinydrm/mipi-dbi.h, line 17 include/drm/tinydrm/mipi-dbi.h, line 54 include/drm/tinydrm/mipi-dbi.h, line 59 include/drm/tinydrm/mipi-dbi.h, line 71