RADEON_CRTC2_PIX_WIDTH_SHIFT
value |= RADEON_CRTC2_CRT2_ON | (2 << RADEON_CRTC2_PIX_WIDTH_SHIFT);
value |= (2 << RADEON_CRTC2_PIX_WIDTH_SHIFT) | RADEON_CRTC2_CRT2_ON
