DISP_FORMAT_MASK
pixel_format = val & DISP_FORMAT_MASK;
#define DISP_FORMAT_8BPP REG_FIELD_PREP(DISP_FORMAT_MASK, 2)
#define DISP_FORMAT_BGRA555 REG_FIELD_PREP(DISP_FORMAT_MASK, 3)
#define DISP_FORMAT_BGRX555 REG_FIELD_PREP(DISP_FORMAT_MASK, 4)
#define DISP_FORMAT_BGRX565 REG_FIELD_PREP(DISP_FORMAT_MASK, 5)
#define DISP_FORMAT_BGRX888 REG_FIELD_PREP(DISP_FORMAT_MASK, 6)
#define DISP_FORMAT_BGRA888 REG_FIELD_PREP(DISP_FORMAT_MASK, 7)
#define DISP_FORMAT_RGBX101010 REG_FIELD_PREP(DISP_FORMAT_MASK, 8)
#define DISP_FORMAT_RGBA101010 REG_FIELD_PREP(DISP_FORMAT_MASK, 9)
#define DISP_FORMAT_BGRX101010 REG_FIELD_PREP(DISP_FORMAT_MASK, 10)
#define DISP_FORMAT_BGRA101010 REG_FIELD_PREP(DISP_FORMAT_MASK, 11)
#define DISP_FORMAT_RGBX161616 REG_FIELD_PREP(DISP_FORMAT_MASK, 12)
#define DISP_FORMAT_RGBX888 REG_FIELD_PREP(DISP_FORMAT_MASK, 14)
#define DISP_FORMAT_RGBA888 REG_FIELD_PREP(DISP_FORMAT_MASK, 15)
fmt = bdw_format_to_drm(val & DISP_FORMAT_MASK);