diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h index d51b81fea9c80..1f46162adb649 100644 --- a/drivers/gpu/drm/ast/ast_drv.h +++ b/drivers/gpu/drm/ast/ast_drv.h @@ -282,7 +282,9 @@ static inline void ast_set_index_reg(struct ast_private *ast, uint32_t base, uint8_t index, uint8_t val) { - ast_io_write16(ast, base, ((u16)val << 8) | index); + ast_io_write8(ast, base, index); + ++base; + ast_io_write8(ast, base, val); } void ast_set_index_reg_mask(struct ast_private *ast,