GL_GLOBAL_ALPHA_SHIFT 410 drivers/gpu/drm/zte/zx_plane.c 0xff << GL_GLOBAL_ALPHA_SHIFT); GL_GLOBAL_ALPHA_SHIFT 23 drivers/gpu/drm/zte/zx_plane_regs.h #define GL_GLOBAL_ALPHA_MASK (0xff << GL_GLOBAL_ALPHA_SHIFT)